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-rw-r--r--llvm/test/CodeGen/X86/extract-lowbits.ll2374
1 files changed, 2374 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/extract-lowbits.ll b/llvm/test/CodeGen/X86/extract-lowbits.ll
new file mode 100644
index 00000000000..825e25fe547
--- /dev/null
+++ b/llvm/test/CodeGen/X86/extract-lowbits.ll
@@ -0,0 +1,2374 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=i686-unknown-linux-gnu -mattr=-bmi,-tbm,-bmi2 < %s | FileCheck %s --check-prefixes=CHECK,X86,NOBMI,X86-NOBMI
+; RUN: llc -mtriple=i686-unknown-linux-gnu -mattr=+bmi,-tbm,-bmi2 < %s | FileCheck %s --check-prefixes=CHECK,X86,BMI1,X86-BMI1
+; RUN: llc -mtriple=i686-unknown-linux-gnu -mattr=+bmi,+tbm,-bmi2 < %s | FileCheck %s --check-prefixes=CHECK,X86,BMI1,X86-BMI1,BMI1TBM,X86-BMI1TBM
+; RUN: llc -mtriple=i686-unknown-linux-gnu -mattr=+bmi,+tbm,+bmi2 < %s | FileCheck %s --check-prefixes=CHECK,X86,BMI1,X86-BMI1,BMI1BMI2,X86-BMI1BMI2,BMI1TBM,X86-BMI1TBM,BMI1TBMBMI2,X86-BMI1TBMBMI2
+; RUN: llc -mtriple=i686-unknown-linux-gnu -mattr=+bmi,-tbm,+bmi2 < %s | FileCheck %s --check-prefixes=CHECK,X86,BMI1,X86-BMI1,BMI1BMI2,X86-BMI1BMI2,BMI1NOTBMBMI2,X86-BMI1NOTBMBMI2
+; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=-bmi,-tbm,-bmi2 < %s | FileCheck %s --check-prefixes=CHECK,X64,NOBMI,X64-NOBMI
+; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=+bmi,-tbm,-bmi2 < %s | FileCheck %s --check-prefixes=CHECK,X64,BMI1,X64-BMI1
+; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=+bmi,+tbm,-bmi2 < %s | FileCheck %s --check-prefixes=CHECK,X64,BMI1,X64-BMI1,BMI1TBM,X64-BMI1TBM
+; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=+bmi,+tbm,+bmi2 < %s | FileCheck %s --check-prefixes=CHECK,X64,BMI1,X64-BMI1,BMI1BMI2,X64-BMI1BMI2,BMI1TBM,X64-BMI1TBM,BMI1TBMBMI2,X64-BMI1TBMBMI2
+; RUN: llc -mtriple=x86_64-unknown-linux-gnu -mattr=+bmi,-tbm,+bmi2 < %s | FileCheck %s --check-prefixes=CHECK,X64,BMI1,X64-BMI1,BMI1BMI2,X64-BMI1BMI2,BMI1NOTBMBMI2,X64-BMI1NOTBMBMI2
+
+; *Please* keep in sync with test/CodeGen/AArch64/extract-lowbits.ll
+
+; https://bugs.llvm.org/show_bug.cgi?id=36419
+; https://bugs.llvm.org/show_bug.cgi?id=37603
+; https://bugs.llvm.org/show_bug.cgi?id=37610
+
+; Patterns:
+; a) x & (1 << nbits) - 1
+; b) x & ~(-1 << nbits)
+; c) x & (-1 >> (32 - y))
+; d) x << (32 - y) >> (32 - y)
+; are equivalent.
+
+; ---------------------------------------------------------------------------- ;
+; Pattern a. 32-bit
+; ---------------------------------------------------------------------------- ;
+
+define i32 @bzhi32_a0(i32 %val, i32 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_a0:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $1, %eax
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: decl %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_a0:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %al
+; X86-BMI1BMI2-NEXT: bzhil %eax, {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_a0:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $1, %eax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shll %cl, %eax
+; X64-NOBMI-NEXT: decl %eax
+; X64-NOBMI-NEXT: andl %edi, %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_a0:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhil %esi, %edi, %eax
+; X64-BMI1BMI2-NEXT: retq
+ %onebit = shl i32 1, %numlowbits
+ %mask = add nsw i32 %onebit, -1
+ %masked = and i32 %mask, %val
+ ret i32 %masked
+}
+
+define i32 @bzhi32_a1_indexzext(i32 %val, i8 zeroext %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_a1_indexzext:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $1, %eax
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: decl %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_a1_indexzext:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %al
+; X86-BMI1BMI2-NEXT: bzhil %eax, {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_a1_indexzext:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $1, %eax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shll %cl, %eax
+; X64-NOBMI-NEXT: decl %eax
+; X64-NOBMI-NEXT: andl %edi, %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_a1_indexzext:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhil %esi, %edi, %eax
+; X64-BMI1BMI2-NEXT: retq
+ %conv = zext i8 %numlowbits to i32
+ %onebit = shl i32 1, %conv
+ %mask = add nsw i32 %onebit, -1
+ %masked = and i32 %mask, %val
+ ret i32 %masked
+}
+
+define i32 @bzhi32_a2_load(i32* %w, i32 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_a2_load:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $1, %eax
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: decl %eax
+; X86-NOBMI-NEXT: andl (%edx), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_a2_load:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: bzhil %ecx, (%eax), %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_a2_load:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $1, %eax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shll %cl, %eax
+; X64-NOBMI-NEXT: decl %eax
+; X64-NOBMI-NEXT: andl (%rdi), %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_a2_load:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhil %esi, (%rdi), %eax
+; X64-BMI1BMI2-NEXT: retq
+ %val = load i32, i32* %w
+ %onebit = shl i32 1, %numlowbits
+ %mask = add nsw i32 %onebit, -1
+ %masked = and i32 %mask, %val
+ ret i32 %masked
+}
+
+define i32 @bzhi32_a3_load_indexzext(i32* %w, i8 zeroext %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_a3_load_indexzext:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $1, %eax
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: decl %eax
+; X86-NOBMI-NEXT: andl (%edx), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_a3_load_indexzext:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: bzhil %ecx, (%eax), %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_a3_load_indexzext:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $1, %eax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shll %cl, %eax
+; X64-NOBMI-NEXT: decl %eax
+; X64-NOBMI-NEXT: andl (%rdi), %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_a3_load_indexzext:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhil %esi, (%rdi), %eax
+; X64-BMI1BMI2-NEXT: retq
+ %val = load i32, i32* %w
+ %conv = zext i8 %numlowbits to i32
+ %onebit = shl i32 1, %conv
+ %mask = add nsw i32 %onebit, -1
+ %masked = and i32 %mask, %val
+ ret i32 %masked
+}
+
+define i32 @bzhi32_a4_commutative(i32 %val, i32 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_a4_commutative:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $1, %eax
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: decl %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_a4_commutative:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %al
+; X86-BMI1BMI2-NEXT: bzhil %eax, {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_a4_commutative:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $1, %eax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shll %cl, %eax
+; X64-NOBMI-NEXT: decl %eax
+; X64-NOBMI-NEXT: andl %edi, %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_a4_commutative:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhil %esi, %edi, %eax
+; X64-BMI1BMI2-NEXT: retq
+ %onebit = shl i32 1, %numlowbits
+ %mask = add nsw i32 %onebit, -1
+ %masked = and i32 %val, %mask ; swapped order
+ ret i32 %masked
+}
+
+; 64-bit
+
+define i64 @bzhi64_a0(i64 %val, i64 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_a0:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $1, %eax
+; X86-NOBMI-NEXT: xorl %edx, %edx
+; X86-NOBMI-NEXT: shldl %cl, %eax, %edx
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: je .LBB5_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %eax, %edx
+; X86-NOBMI-NEXT: xorl %eax, %eax
+; X86-NOBMI-NEXT: .LBB5_2:
+; X86-NOBMI-NEXT: addl $-1, %eax
+; X86-NOBMI-NEXT: adcl $-1, %edx
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_a0:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: movl $1, %eax
+; X86-BMI1BMI2-NEXT: xorl %edx, %edx
+; X86-BMI1BMI2-NEXT: shldl %cl, %eax, %edx
+; X86-BMI1BMI2-NEXT: shlxl %ecx, %eax, %eax
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB5_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %eax, %edx
+; X86-BMI1BMI2-NEXT: xorl %eax, %eax
+; X86-BMI1BMI2-NEXT: .LBB5_2:
+; X86-BMI1BMI2-NEXT: addl $-1, %eax
+; X86-BMI1BMI2-NEXT: adcl $-1, %edx
+; X86-BMI1BMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-BMI1BMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_a0:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $1, %eax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shlq %cl, %rax
+; X64-NOBMI-NEXT: decq %rax
+; X64-NOBMI-NEXT: andq %rdi, %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_a0:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhiq %rsi, %rdi, %rax
+; X64-BMI1BMI2-NEXT: retq
+ %onebit = shl i64 1, %numlowbits
+ %mask = add nsw i64 %onebit, -1
+ %masked = and i64 %mask, %val
+ ret i64 %masked
+}
+
+define i64 @bzhi64_a1_indexzext(i64 %val, i8 zeroext %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_a1_indexzext:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $1, %eax
+; X86-NOBMI-NEXT: xorl %edx, %edx
+; X86-NOBMI-NEXT: shldl %cl, %eax, %edx
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: je .LBB6_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %eax, %edx
+; X86-NOBMI-NEXT: xorl %eax, %eax
+; X86-NOBMI-NEXT: .LBB6_2:
+; X86-NOBMI-NEXT: addl $-1, %eax
+; X86-NOBMI-NEXT: adcl $-1, %edx
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_a1_indexzext:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: movl $1, %eax
+; X86-BMI1BMI2-NEXT: xorl %edx, %edx
+; X86-BMI1BMI2-NEXT: shldl %cl, %eax, %edx
+; X86-BMI1BMI2-NEXT: shlxl %ecx, %eax, %eax
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB6_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %eax, %edx
+; X86-BMI1BMI2-NEXT: xorl %eax, %eax
+; X86-BMI1BMI2-NEXT: .LBB6_2:
+; X86-BMI1BMI2-NEXT: addl $-1, %eax
+; X86-BMI1BMI2-NEXT: adcl $-1, %edx
+; X86-BMI1BMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-BMI1BMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_a1_indexzext:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $1, %eax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shlq %cl, %rax
+; X64-NOBMI-NEXT: decq %rax
+; X64-NOBMI-NEXT: andq %rdi, %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_a1_indexzext:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: # kill: def $esi killed $esi def $rsi
+; X64-BMI1BMI2-NEXT: bzhiq %rsi, %rdi, %rax
+; X64-BMI1BMI2-NEXT: retq
+ %conv = zext i8 %numlowbits to i64
+ %onebit = shl i64 1, %conv
+ %mask = add nsw i64 %onebit, -1
+ %masked = and i64 %mask, %val
+ ret i64 %masked
+}
+
+define i64 @bzhi64_a2_load(i64* %w, i64 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_a2_load:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: pushl %esi
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %esi
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $1, %eax
+; X86-NOBMI-NEXT: xorl %edx, %edx
+; X86-NOBMI-NEXT: shldl %cl, %eax, %edx
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: je .LBB7_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %eax, %edx
+; X86-NOBMI-NEXT: xorl %eax, %eax
+; X86-NOBMI-NEXT: .LBB7_2:
+; X86-NOBMI-NEXT: addl $-1, %eax
+; X86-NOBMI-NEXT: adcl $-1, %edx
+; X86-NOBMI-NEXT: andl 4(%esi), %edx
+; X86-NOBMI-NEXT: andl (%esi), %eax
+; X86-NOBMI-NEXT: popl %esi
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_a2_load:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: pushl %esi
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %esi
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: movl $1, %eax
+; X86-BMI1BMI2-NEXT: xorl %edx, %edx
+; X86-BMI1BMI2-NEXT: shldl %cl, %eax, %edx
+; X86-BMI1BMI2-NEXT: shlxl %ecx, %eax, %eax
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB7_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %eax, %edx
+; X86-BMI1BMI2-NEXT: xorl %eax, %eax
+; X86-BMI1BMI2-NEXT: .LBB7_2:
+; X86-BMI1BMI2-NEXT: addl $-1, %eax
+; X86-BMI1BMI2-NEXT: adcl $-1, %edx
+; X86-BMI1BMI2-NEXT: andl 4(%esi), %edx
+; X86-BMI1BMI2-NEXT: andl (%esi), %eax
+; X86-BMI1BMI2-NEXT: popl %esi
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_a2_load:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $1, %eax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shlq %cl, %rax
+; X64-NOBMI-NEXT: decq %rax
+; X64-NOBMI-NEXT: andq (%rdi), %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_a2_load:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhiq %rsi, (%rdi), %rax
+; X64-BMI1BMI2-NEXT: retq
+ %val = load i64, i64* %w
+ %onebit = shl i64 1, %numlowbits
+ %mask = add nsw i64 %onebit, -1
+ %masked = and i64 %mask, %val
+ ret i64 %masked
+}
+
+define i64 @bzhi64_a3_load_indexzext(i64* %w, i8 zeroext %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_a3_load_indexzext:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: pushl %esi
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %esi
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $1, %eax
+; X86-NOBMI-NEXT: xorl %edx, %edx
+; X86-NOBMI-NEXT: shldl %cl, %eax, %edx
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: je .LBB8_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %eax, %edx
+; X86-NOBMI-NEXT: xorl %eax, %eax
+; X86-NOBMI-NEXT: .LBB8_2:
+; X86-NOBMI-NEXT: addl $-1, %eax
+; X86-NOBMI-NEXT: adcl $-1, %edx
+; X86-NOBMI-NEXT: andl 4(%esi), %edx
+; X86-NOBMI-NEXT: andl (%esi), %eax
+; X86-NOBMI-NEXT: popl %esi
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_a3_load_indexzext:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: pushl %esi
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %esi
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: movl $1, %eax
+; X86-BMI1BMI2-NEXT: xorl %edx, %edx
+; X86-BMI1BMI2-NEXT: shldl %cl, %eax, %edx
+; X86-BMI1BMI2-NEXT: shlxl %ecx, %eax, %eax
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB8_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %eax, %edx
+; X86-BMI1BMI2-NEXT: xorl %eax, %eax
+; X86-BMI1BMI2-NEXT: .LBB8_2:
+; X86-BMI1BMI2-NEXT: addl $-1, %eax
+; X86-BMI1BMI2-NEXT: adcl $-1, %edx
+; X86-BMI1BMI2-NEXT: andl 4(%esi), %edx
+; X86-BMI1BMI2-NEXT: andl (%esi), %eax
+; X86-BMI1BMI2-NEXT: popl %esi
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_a3_load_indexzext:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $1, %eax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shlq %cl, %rax
+; X64-NOBMI-NEXT: decq %rax
+; X64-NOBMI-NEXT: andq (%rdi), %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_a3_load_indexzext:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: # kill: def $esi killed $esi def $rsi
+; X64-BMI1BMI2-NEXT: bzhiq %rsi, (%rdi), %rax
+; X64-BMI1BMI2-NEXT: retq
+ %val = load i64, i64* %w
+ %conv = zext i8 %numlowbits to i64
+ %onebit = shl i64 1, %conv
+ %mask = add nsw i64 %onebit, -1
+ %masked = and i64 %mask, %val
+ ret i64 %masked
+}
+
+define i64 @bzhi64_a4_commutative(i64 %val, i64 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_a4_commutative:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $1, %eax
+; X86-NOBMI-NEXT: xorl %edx, %edx
+; X86-NOBMI-NEXT: shldl %cl, %eax, %edx
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: je .LBB9_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %eax, %edx
+; X86-NOBMI-NEXT: xorl %eax, %eax
+; X86-NOBMI-NEXT: .LBB9_2:
+; X86-NOBMI-NEXT: addl $-1, %eax
+; X86-NOBMI-NEXT: adcl $-1, %edx
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_a4_commutative:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: movl $1, %eax
+; X86-BMI1BMI2-NEXT: xorl %edx, %edx
+; X86-BMI1BMI2-NEXT: shldl %cl, %eax, %edx
+; X86-BMI1BMI2-NEXT: shlxl %ecx, %eax, %eax
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB9_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %eax, %edx
+; X86-BMI1BMI2-NEXT: xorl %eax, %eax
+; X86-BMI1BMI2-NEXT: .LBB9_2:
+; X86-BMI1BMI2-NEXT: addl $-1, %eax
+; X86-BMI1BMI2-NEXT: adcl $-1, %edx
+; X86-BMI1BMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-BMI1BMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_a4_commutative:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $1, %eax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shlq %cl, %rax
+; X64-NOBMI-NEXT: decq %rax
+; X64-NOBMI-NEXT: andq %rdi, %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_a4_commutative:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhiq %rsi, %rdi, %rax
+; X64-BMI1BMI2-NEXT: retq
+ %onebit = shl i64 1, %numlowbits
+ %mask = add nsw i64 %onebit, -1
+ %masked = and i64 %val, %mask ; swapped order
+ ret i64 %masked
+}
+
+; ---------------------------------------------------------------------------- ;
+; Pattern b. 32-bit
+; ---------------------------------------------------------------------------- ;
+
+define i32 @bzhi32_b0(i32 %val, i32 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_b0:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: notl %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_b0:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %al
+; X86-BMI1BMI2-NEXT: movl $-1, %ecx
+; X86-BMI1BMI2-NEXT: shlxl %eax, %ecx, %eax
+; X86-BMI1BMI2-NEXT: andnl {{[0-9]+}}(%esp), %eax, %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_b0:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $-1, %eax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shll %cl, %eax
+; X64-NOBMI-NEXT: notl %eax
+; X64-NOBMI-NEXT: andl %edi, %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_b0:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: movl $-1, %eax
+; X64-BMI1BMI2-NEXT: shlxl %esi, %eax, %eax
+; X64-BMI1BMI2-NEXT: andnl %edi, %eax, %eax
+; X64-BMI1BMI2-NEXT: retq
+ %notmask = shl i32 -1, %numlowbits
+ %mask = xor i32 %notmask, -1
+ %masked = and i32 %mask, %val
+ ret i32 %masked
+}
+
+define i32 @bzhi32_b1_indexzext(i32 %val, i8 zeroext %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_b1_indexzext:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: notl %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_b1_indexzext:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %al
+; X86-BMI1BMI2-NEXT: movl $-1, %ecx
+; X86-BMI1BMI2-NEXT: shlxl %eax, %ecx, %eax
+; X86-BMI1BMI2-NEXT: andnl {{[0-9]+}}(%esp), %eax, %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_b1_indexzext:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $-1, %eax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shll %cl, %eax
+; X64-NOBMI-NEXT: notl %eax
+; X64-NOBMI-NEXT: andl %edi, %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_b1_indexzext:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: movl $-1, %eax
+; X64-BMI1BMI2-NEXT: shlxl %esi, %eax, %eax
+; X64-BMI1BMI2-NEXT: andnl %edi, %eax, %eax
+; X64-BMI1BMI2-NEXT: retq
+ %conv = zext i8 %numlowbits to i32
+ %notmask = shl i32 -1, %conv
+ %mask = xor i32 %notmask, -1
+ %masked = and i32 %mask, %val
+ ret i32 %masked
+}
+
+define i32 @bzhi32_b2_load(i32* %w, i32 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_b2_load:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: notl %eax
+; X86-NOBMI-NEXT: andl (%edx), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_b2_load:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: movl $-1, %edx
+; X86-BMI1BMI2-NEXT: shlxl %ecx, %edx, %ecx
+; X86-BMI1BMI2-NEXT: andnl (%eax), %ecx, %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_b2_load:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $-1, %eax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shll %cl, %eax
+; X64-NOBMI-NEXT: notl %eax
+; X64-NOBMI-NEXT: andl (%rdi), %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_b2_load:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: movl $-1, %eax
+; X64-BMI1BMI2-NEXT: shlxl %esi, %eax, %eax
+; X64-BMI1BMI2-NEXT: andnl (%rdi), %eax, %eax
+; X64-BMI1BMI2-NEXT: retq
+ %val = load i32, i32* %w
+ %notmask = shl i32 -1, %numlowbits
+ %mask = xor i32 %notmask, -1
+ %masked = and i32 %mask, %val
+ ret i32 %masked
+}
+
+define i32 @bzhi32_b3_load_indexzext(i32* %w, i8 zeroext %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_b3_load_indexzext:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: notl %eax
+; X86-NOBMI-NEXT: andl (%edx), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_b3_load_indexzext:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: movl $-1, %edx
+; X86-BMI1BMI2-NEXT: shlxl %ecx, %edx, %ecx
+; X86-BMI1BMI2-NEXT: andnl (%eax), %ecx, %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_b3_load_indexzext:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $-1, %eax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shll %cl, %eax
+; X64-NOBMI-NEXT: notl %eax
+; X64-NOBMI-NEXT: andl (%rdi), %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_b3_load_indexzext:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: movl $-1, %eax
+; X64-BMI1BMI2-NEXT: shlxl %esi, %eax, %eax
+; X64-BMI1BMI2-NEXT: andnl (%rdi), %eax, %eax
+; X64-BMI1BMI2-NEXT: retq
+ %val = load i32, i32* %w
+ %conv = zext i8 %numlowbits to i32
+ %notmask = shl i32 -1, %conv
+ %mask = xor i32 %notmask, -1
+ %masked = and i32 %mask, %val
+ ret i32 %masked
+}
+
+define i32 @bzhi32_b4_commutative(i32 %val, i32 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_b4_commutative:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: notl %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_b4_commutative:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %al
+; X86-BMI1BMI2-NEXT: movl $-1, %ecx
+; X86-BMI1BMI2-NEXT: shlxl %eax, %ecx, %eax
+; X86-BMI1BMI2-NEXT: andnl {{[0-9]+}}(%esp), %eax, %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_b4_commutative:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $-1, %eax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shll %cl, %eax
+; X64-NOBMI-NEXT: notl %eax
+; X64-NOBMI-NEXT: andl %edi, %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_b4_commutative:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: movl $-1, %eax
+; X64-BMI1BMI2-NEXT: shlxl %esi, %eax, %eax
+; X64-BMI1BMI2-NEXT: andnl %edi, %eax, %eax
+; X64-BMI1BMI2-NEXT: retq
+ %notmask = shl i32 -1, %numlowbits
+ %mask = xor i32 %notmask, -1
+ %masked = and i32 %val, %mask ; swapped order
+ ret i32 %masked
+}
+
+; 64-bit
+
+define i64 @bzhi64_b0(i64 %val, i64 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_b0:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $-1, %edx
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: shldl %cl, %edx, %edx
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: je .LBB15_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %eax, %edx
+; X86-NOBMI-NEXT: xorl %eax, %eax
+; X86-NOBMI-NEXT: .LBB15_2:
+; X86-NOBMI-NEXT: notl %edx
+; X86-NOBMI-NEXT: notl %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_b0:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: pushl %esi
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: movl $-1, %eax
+; X86-BMI1BMI2-NEXT: shlxl %ecx, %eax, %esi
+; X86-BMI1BMI2-NEXT: shldl %cl, %eax, %eax
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB15_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %esi, %eax
+; X86-BMI1BMI2-NEXT: xorl %esi, %esi
+; X86-BMI1BMI2-NEXT: .LBB15_2:
+; X86-BMI1BMI2-NEXT: andnl {{[0-9]+}}(%esp), %eax, %edx
+; X86-BMI1BMI2-NEXT: andnl {{[0-9]+}}(%esp), %esi, %eax
+; X86-BMI1BMI2-NEXT: popl %esi
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_b0:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movq $-1, %rax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shlq %cl, %rax
+; X64-NOBMI-NEXT: notq %rax
+; X64-NOBMI-NEXT: andq %rdi, %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_b0:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: movq $-1, %rax
+; X64-BMI1BMI2-NEXT: shlxq %rsi, %rax, %rax
+; X64-BMI1BMI2-NEXT: andnq %rdi, %rax, %rax
+; X64-BMI1BMI2-NEXT: retq
+ %notmask = shl i64 -1, %numlowbits
+ %mask = xor i64 %notmask, -1
+ %masked = and i64 %mask, %val
+ ret i64 %masked
+}
+
+define i64 @bzhi64_b1_indexzext(i64 %val, i8 zeroext %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_b1_indexzext:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $-1, %edx
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: shldl %cl, %edx, %edx
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: je .LBB16_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %eax, %edx
+; X86-NOBMI-NEXT: xorl %eax, %eax
+; X86-NOBMI-NEXT: .LBB16_2:
+; X86-NOBMI-NEXT: notl %edx
+; X86-NOBMI-NEXT: notl %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_b1_indexzext:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: pushl %esi
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: movl $-1, %eax
+; X86-BMI1BMI2-NEXT: shlxl %ecx, %eax, %esi
+; X86-BMI1BMI2-NEXT: shldl %cl, %eax, %eax
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB16_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %esi, %eax
+; X86-BMI1BMI2-NEXT: xorl %esi, %esi
+; X86-BMI1BMI2-NEXT: .LBB16_2:
+; X86-BMI1BMI2-NEXT: andnl {{[0-9]+}}(%esp), %eax, %edx
+; X86-BMI1BMI2-NEXT: andnl {{[0-9]+}}(%esp), %esi, %eax
+; X86-BMI1BMI2-NEXT: popl %esi
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_b1_indexzext:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movq $-1, %rax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shlq %cl, %rax
+; X64-NOBMI-NEXT: notq %rax
+; X64-NOBMI-NEXT: andq %rdi, %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_b1_indexzext:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: # kill: def $esi killed $esi def $rsi
+; X64-BMI1BMI2-NEXT: movq $-1, %rax
+; X64-BMI1BMI2-NEXT: shlxq %rsi, %rax, %rax
+; X64-BMI1BMI2-NEXT: andnq %rdi, %rax, %rax
+; X64-BMI1BMI2-NEXT: retq
+ %conv = zext i8 %numlowbits to i64
+ %notmask = shl i64 -1, %conv
+ %mask = xor i64 %notmask, -1
+ %masked = and i64 %mask, %val
+ ret i64 %masked
+}
+
+define i64 @bzhi64_b2_load(i64* %w, i64 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_b2_load:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: pushl %esi
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %esi
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $-1, %edx
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: shldl %cl, %edx, %edx
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: je .LBB17_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %eax, %edx
+; X86-NOBMI-NEXT: xorl %eax, %eax
+; X86-NOBMI-NEXT: .LBB17_2:
+; X86-NOBMI-NEXT: notl %edx
+; X86-NOBMI-NEXT: notl %eax
+; X86-NOBMI-NEXT: andl 4(%esi), %edx
+; X86-NOBMI-NEXT: andl (%esi), %eax
+; X86-NOBMI-NEXT: popl %esi
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_b2_load:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: pushl %esi
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: movl $-1, %edx
+; X86-BMI1BMI2-NEXT: shlxl %ecx, %edx, %esi
+; X86-BMI1BMI2-NEXT: shldl %cl, %edx, %edx
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB17_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %esi, %edx
+; X86-BMI1BMI2-NEXT: xorl %esi, %esi
+; X86-BMI1BMI2-NEXT: .LBB17_2:
+; X86-BMI1BMI2-NEXT: andnl 4(%eax), %edx, %edx
+; X86-BMI1BMI2-NEXT: andnl (%eax), %esi, %eax
+; X86-BMI1BMI2-NEXT: popl %esi
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_b2_load:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movq $-1, %rax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shlq %cl, %rax
+; X64-NOBMI-NEXT: notq %rax
+; X64-NOBMI-NEXT: andq (%rdi), %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_b2_load:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: movq $-1, %rax
+; X64-BMI1BMI2-NEXT: shlxq %rsi, %rax, %rax
+; X64-BMI1BMI2-NEXT: andnq (%rdi), %rax, %rax
+; X64-BMI1BMI2-NEXT: retq
+ %val = load i64, i64* %w
+ %notmask = shl i64 -1, %numlowbits
+ %mask = xor i64 %notmask, -1
+ %masked = and i64 %mask, %val
+ ret i64 %masked
+}
+
+define i64 @bzhi64_b3_load_indexzext(i64* %w, i8 zeroext %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_b3_load_indexzext:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: pushl %esi
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %esi
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $-1, %edx
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: shldl %cl, %edx, %edx
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: je .LBB18_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %eax, %edx
+; X86-NOBMI-NEXT: xorl %eax, %eax
+; X86-NOBMI-NEXT: .LBB18_2:
+; X86-NOBMI-NEXT: notl %edx
+; X86-NOBMI-NEXT: notl %eax
+; X86-NOBMI-NEXT: andl 4(%esi), %edx
+; X86-NOBMI-NEXT: andl (%esi), %eax
+; X86-NOBMI-NEXT: popl %esi
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_b3_load_indexzext:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: pushl %esi
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: movl $-1, %edx
+; X86-BMI1BMI2-NEXT: shlxl %ecx, %edx, %esi
+; X86-BMI1BMI2-NEXT: shldl %cl, %edx, %edx
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB18_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %esi, %edx
+; X86-BMI1BMI2-NEXT: xorl %esi, %esi
+; X86-BMI1BMI2-NEXT: .LBB18_2:
+; X86-BMI1BMI2-NEXT: andnl 4(%eax), %edx, %edx
+; X86-BMI1BMI2-NEXT: andnl (%eax), %esi, %eax
+; X86-BMI1BMI2-NEXT: popl %esi
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_b3_load_indexzext:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movq $-1, %rax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shlq %cl, %rax
+; X64-NOBMI-NEXT: notq %rax
+; X64-NOBMI-NEXT: andq (%rdi), %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_b3_load_indexzext:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: # kill: def $esi killed $esi def $rsi
+; X64-BMI1BMI2-NEXT: movq $-1, %rax
+; X64-BMI1BMI2-NEXT: shlxq %rsi, %rax, %rax
+; X64-BMI1BMI2-NEXT: andnq (%rdi), %rax, %rax
+; X64-BMI1BMI2-NEXT: retq
+ %val = load i64, i64* %w
+ %conv = zext i8 %numlowbits to i64
+ %notmask = shl i64 -1, %conv
+ %mask = xor i64 %notmask, -1
+ %masked = and i64 %mask, %val
+ ret i64 %masked
+}
+
+define i64 @bzhi64_b4_commutative(i64 %val, i64 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_b4_commutative:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $-1, %edx
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: shldl %cl, %edx, %edx
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: je .LBB19_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %eax, %edx
+; X86-NOBMI-NEXT: xorl %eax, %eax
+; X86-NOBMI-NEXT: .LBB19_2:
+; X86-NOBMI-NEXT: notl %edx
+; X86-NOBMI-NEXT: notl %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_b4_commutative:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: pushl %esi
+; X86-BMI1BMI2-NEXT: movb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: movl $-1, %eax
+; X86-BMI1BMI2-NEXT: shlxl %ecx, %eax, %esi
+; X86-BMI1BMI2-NEXT: shldl %cl, %eax, %eax
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB19_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %esi, %eax
+; X86-BMI1BMI2-NEXT: xorl %esi, %esi
+; X86-BMI1BMI2-NEXT: .LBB19_2:
+; X86-BMI1BMI2-NEXT: andnl {{[0-9]+}}(%esp), %eax, %edx
+; X86-BMI1BMI2-NEXT: andnl {{[0-9]+}}(%esp), %esi, %eax
+; X86-BMI1BMI2-NEXT: popl %esi
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_b4_commutative:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movq $-1, %rax
+; X64-NOBMI-NEXT: movl %esi, %ecx
+; X64-NOBMI-NEXT: shlq %cl, %rax
+; X64-NOBMI-NEXT: notq %rax
+; X64-NOBMI-NEXT: andq %rdi, %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_b4_commutative:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: movq $-1, %rax
+; X64-BMI1BMI2-NEXT: shlxq %rsi, %rax, %rax
+; X64-BMI1BMI2-NEXT: andnq %rdi, %rax, %rax
+; X64-BMI1BMI2-NEXT: retq
+ %notmask = shl i64 -1, %numlowbits
+ %mask = xor i64 %notmask, -1
+ %masked = and i64 %val, %mask ; swapped order
+ ret i64 %masked
+}
+
+; ---------------------------------------------------------------------------- ;
+; Pattern c. 32-bit
+; ---------------------------------------------------------------------------- ;
+
+define i32 @bzhi32_c0(i32 %val, i32 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_c0:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl $32, %ecx
+; X86-NOBMI-NEXT: subl {{[0-9]+}}(%esp), %ecx
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: # kill: def $cl killed $cl killed $ecx
+; X86-NOBMI-NEXT: shrl %cl, %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_c0:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: bzhil %eax, {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_c0:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $32, %ecx
+; X64-NOBMI-NEXT: subl %esi, %ecx
+; X64-NOBMI-NEXT: movl $-1, %eax
+; X64-NOBMI-NEXT: # kill: def $cl killed $cl killed $ecx
+; X64-NOBMI-NEXT: shrl %cl, %eax
+; X64-NOBMI-NEXT: andl %edi, %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_c0:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhil %esi, %edi, %eax
+; X64-BMI1BMI2-NEXT: retq
+ %numhighbits = sub i32 32, %numlowbits
+ %mask = lshr i32 -1, %numhighbits
+ %masked = and i32 %mask, %val
+ ret i32 %masked
+}
+
+define i32 @bzhi32_c1_indexzext(i32 %val, i8 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_c1_indexzext:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movb $32, %cl
+; X86-NOBMI-NEXT: subb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: shrl %cl, %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_c1_indexzext:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movb $32, %al
+; X86-BMI1BMI2-NEXT: subb {{[0-9]+}}(%esp), %al
+; X86-BMI1BMI2-NEXT: movl $-1, %ecx
+; X86-BMI1BMI2-NEXT: shrxl %eax, %ecx, %eax
+; X86-BMI1BMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_c1_indexzext:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movb $32, %cl
+; X64-NOBMI-NEXT: subb %sil, %cl
+; X64-NOBMI-NEXT: movl $-1, %eax
+; X64-NOBMI-NEXT: shrl %cl, %eax
+; X64-NOBMI-NEXT: andl %edi, %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_c1_indexzext:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: movb $32, %al
+; X64-BMI1BMI2-NEXT: subb %sil, %al
+; X64-BMI1BMI2-NEXT: movl $-1, %ecx
+; X64-BMI1BMI2-NEXT: shrxl %eax, %ecx, %eax
+; X64-BMI1BMI2-NEXT: andl %edi, %eax
+; X64-BMI1BMI2-NEXT: retq
+ %numhighbits = sub i8 32, %numlowbits
+ %sh_prom = zext i8 %numhighbits to i32
+ %mask = lshr i32 -1, %sh_prom
+ %masked = and i32 %mask, %val
+ ret i32 %masked
+}
+
+define i32 @bzhi32_c2_load(i32* %w, i32 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_c2_load:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: movl $32, %ecx
+; X86-NOBMI-NEXT: subl {{[0-9]+}}(%esp), %ecx
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: # kill: def $cl killed $cl killed $ecx
+; X86-NOBMI-NEXT: shrl %cl, %eax
+; X86-NOBMI-NEXT: andl (%edx), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_c2_load:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-BMI1BMI2-NEXT: bzhil %eax, (%ecx), %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_c2_load:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $32, %ecx
+; X64-NOBMI-NEXT: subl %esi, %ecx
+; X64-NOBMI-NEXT: movl $-1, %eax
+; X64-NOBMI-NEXT: # kill: def $cl killed $cl killed $ecx
+; X64-NOBMI-NEXT: shrl %cl, %eax
+; X64-NOBMI-NEXT: andl (%rdi), %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_c2_load:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhil %esi, (%rdi), %eax
+; X64-BMI1BMI2-NEXT: retq
+ %val = load i32, i32* %w
+ %numhighbits = sub i32 32, %numlowbits
+ %mask = lshr i32 -1, %numhighbits
+ %masked = and i32 %mask, %val
+ ret i32 %masked
+}
+
+define i32 @bzhi32_c3_load_indexzext(i32* %w, i8 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_c3_load_indexzext:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: movb $32, %cl
+; X86-NOBMI-NEXT: subb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: shrl %cl, %eax
+; X86-NOBMI-NEXT: andl (%edx), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_c3_load_indexzext:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-BMI1BMI2-NEXT: movb $32, %al
+; X86-BMI1BMI2-NEXT: subb {{[0-9]+}}(%esp), %al
+; X86-BMI1BMI2-NEXT: movl $-1, %edx
+; X86-BMI1BMI2-NEXT: shrxl %eax, %edx, %eax
+; X86-BMI1BMI2-NEXT: andl (%ecx), %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_c3_load_indexzext:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movb $32, %cl
+; X64-NOBMI-NEXT: subb %sil, %cl
+; X64-NOBMI-NEXT: movl $-1, %eax
+; X64-NOBMI-NEXT: shrl %cl, %eax
+; X64-NOBMI-NEXT: andl (%rdi), %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_c3_load_indexzext:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: movb $32, %al
+; X64-BMI1BMI2-NEXT: subb %sil, %al
+; X64-BMI1BMI2-NEXT: movl $-1, %ecx
+; X64-BMI1BMI2-NEXT: shrxl %eax, %ecx, %eax
+; X64-BMI1BMI2-NEXT: andl (%rdi), %eax
+; X64-BMI1BMI2-NEXT: retq
+ %val = load i32, i32* %w
+ %numhighbits = sub i8 32, %numlowbits
+ %sh_prom = zext i8 %numhighbits to i32
+ %mask = lshr i32 -1, %sh_prom
+ %masked = and i32 %mask, %val
+ ret i32 %masked
+}
+
+define i32 @bzhi32_c4_commutative(i32 %val, i32 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_c4_commutative:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl $32, %ecx
+; X86-NOBMI-NEXT: subl {{[0-9]+}}(%esp), %ecx
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: # kill: def $cl killed $cl killed $ecx
+; X86-NOBMI-NEXT: shrl %cl, %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_c4_commutative:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: bzhil %eax, {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_c4_commutative:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $32, %ecx
+; X64-NOBMI-NEXT: subl %esi, %ecx
+; X64-NOBMI-NEXT: movl $-1, %eax
+; X64-NOBMI-NEXT: # kill: def $cl killed $cl killed $ecx
+; X64-NOBMI-NEXT: shrl %cl, %eax
+; X64-NOBMI-NEXT: andl %edi, %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_c4_commutative:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhil %esi, %edi, %eax
+; X64-BMI1BMI2-NEXT: retq
+ %numhighbits = sub i32 32, %numlowbits
+ %mask = lshr i32 -1, %numhighbits
+ %masked = and i32 %val, %mask ; swapped order
+ ret i32 %masked
+}
+
+; 64-bit
+
+define i64 @bzhi64_c0(i64 %val, i64 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_c0:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl $64, %ecx
+; X86-NOBMI-NEXT: subl {{[0-9]+}}(%esp), %ecx
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: movl $-1, %edx
+; X86-NOBMI-NEXT: shrl %cl, %edx
+; X86-NOBMI-NEXT: shrdl %cl, %eax, %eax
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: je .LBB25_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %edx, %eax
+; X86-NOBMI-NEXT: xorl %edx, %edx
+; X86-NOBMI-NEXT: .LBB25_2:
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_c0:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movl $64, %ecx
+; X86-BMI1BMI2-NEXT: subl {{[0-9]+}}(%esp), %ecx
+; X86-BMI1BMI2-NEXT: movl $-1, %eax
+; X86-BMI1BMI2-NEXT: shrxl %ecx, %eax, %edx
+; X86-BMI1BMI2-NEXT: shrdl %cl, %eax, %eax
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB25_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %edx, %eax
+; X86-BMI1BMI2-NEXT: xorl %edx, %edx
+; X86-BMI1BMI2-NEXT: .LBB25_2:
+; X86-BMI1BMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_c0:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $64, %ecx
+; X64-NOBMI-NEXT: subl %esi, %ecx
+; X64-NOBMI-NEXT: movq $-1, %rax
+; X64-NOBMI-NEXT: # kill: def $cl killed $cl killed $ecx
+; X64-NOBMI-NEXT: shrq %cl, %rax
+; X64-NOBMI-NEXT: andq %rdi, %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_c0:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhiq %rsi, %rdi, %rax
+; X64-BMI1BMI2-NEXT: retq
+ %numhighbits = sub i64 64, %numlowbits
+ %mask = lshr i64 -1, %numhighbits
+ %masked = and i64 %mask, %val
+ ret i64 %masked
+}
+
+define i64 @bzhi64_c1_indexzext(i64 %val, i8 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_c1_indexzext:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movb $64, %cl
+; X86-NOBMI-NEXT: subb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: movl $-1, %edx
+; X86-NOBMI-NEXT: shrl %cl, %edx
+; X86-NOBMI-NEXT: shrdl %cl, %eax, %eax
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: je .LBB26_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %edx, %eax
+; X86-NOBMI-NEXT: xorl %edx, %edx
+; X86-NOBMI-NEXT: .LBB26_2:
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_c1_indexzext:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movb $64, %cl
+; X86-BMI1BMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: movl $-1, %eax
+; X86-BMI1BMI2-NEXT: shrxl %ecx, %eax, %edx
+; X86-BMI1BMI2-NEXT: shrdl %cl, %eax, %eax
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB26_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %edx, %eax
+; X86-BMI1BMI2-NEXT: xorl %edx, %edx
+; X86-BMI1BMI2-NEXT: .LBB26_2:
+; X86-BMI1BMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_c1_indexzext:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movb $64, %cl
+; X64-NOBMI-NEXT: subb %sil, %cl
+; X64-NOBMI-NEXT: movq $-1, %rax
+; X64-NOBMI-NEXT: shrq %cl, %rax
+; X64-NOBMI-NEXT: andq %rdi, %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_c1_indexzext:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: movb $64, %al
+; X64-BMI1BMI2-NEXT: subb %sil, %al
+; X64-BMI1BMI2-NEXT: movq $-1, %rcx
+; X64-BMI1BMI2-NEXT: shrxq %rax, %rcx, %rax
+; X64-BMI1BMI2-NEXT: andq %rdi, %rax
+; X64-BMI1BMI2-NEXT: retq
+ %numhighbits = sub i8 64, %numlowbits
+ %sh_prom = zext i8 %numhighbits to i64
+ %mask = lshr i64 -1, %sh_prom
+ %masked = and i64 %mask, %val
+ ret i64 %masked
+}
+
+define i64 @bzhi64_c2_load(i64* %w, i64 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_c2_load:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: pushl %esi
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %esi
+; X86-NOBMI-NEXT: movl $64, %ecx
+; X86-NOBMI-NEXT: subl {{[0-9]+}}(%esp), %ecx
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: movl $-1, %edx
+; X86-NOBMI-NEXT: shrl %cl, %edx
+; X86-NOBMI-NEXT: shrdl %cl, %eax, %eax
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: je .LBB27_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %edx, %eax
+; X86-NOBMI-NEXT: xorl %edx, %edx
+; X86-NOBMI-NEXT: .LBB27_2:
+; X86-NOBMI-NEXT: andl (%esi), %eax
+; X86-NOBMI-NEXT: andl 4(%esi), %edx
+; X86-NOBMI-NEXT: popl %esi
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_c2_load:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: pushl %esi
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %esi
+; X86-BMI1BMI2-NEXT: movl $64, %ecx
+; X86-BMI1BMI2-NEXT: subl {{[0-9]+}}(%esp), %ecx
+; X86-BMI1BMI2-NEXT: movl $-1, %eax
+; X86-BMI1BMI2-NEXT: shrxl %ecx, %eax, %edx
+; X86-BMI1BMI2-NEXT: shrdl %cl, %eax, %eax
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB27_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %edx, %eax
+; X86-BMI1BMI2-NEXT: xorl %edx, %edx
+; X86-BMI1BMI2-NEXT: .LBB27_2:
+; X86-BMI1BMI2-NEXT: andl (%esi), %eax
+; X86-BMI1BMI2-NEXT: andl 4(%esi), %edx
+; X86-BMI1BMI2-NEXT: popl %esi
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_c2_load:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $64, %ecx
+; X64-NOBMI-NEXT: subl %esi, %ecx
+; X64-NOBMI-NEXT: movq $-1, %rax
+; X64-NOBMI-NEXT: # kill: def $cl killed $cl killed $ecx
+; X64-NOBMI-NEXT: shrq %cl, %rax
+; X64-NOBMI-NEXT: andq (%rdi), %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_c2_load:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhiq %rsi, (%rdi), %rax
+; X64-BMI1BMI2-NEXT: retq
+ %val = load i64, i64* %w
+ %numhighbits = sub i64 64, %numlowbits
+ %mask = lshr i64 -1, %numhighbits
+ %masked = and i64 %mask, %val
+ ret i64 %masked
+}
+
+define i64 @bzhi64_c3_load_indexzext(i64* %w, i8 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_c3_load_indexzext:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: pushl %esi
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %esi
+; X86-NOBMI-NEXT: movb $64, %cl
+; X86-NOBMI-NEXT: subb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: movl $-1, %edx
+; X86-NOBMI-NEXT: shrl %cl, %edx
+; X86-NOBMI-NEXT: shrdl %cl, %eax, %eax
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: je .LBB28_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %edx, %eax
+; X86-NOBMI-NEXT: xorl %edx, %edx
+; X86-NOBMI-NEXT: .LBB28_2:
+; X86-NOBMI-NEXT: andl (%esi), %eax
+; X86-NOBMI-NEXT: andl 4(%esi), %edx
+; X86-NOBMI-NEXT: popl %esi
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_c3_load_indexzext:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: pushl %esi
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %esi
+; X86-BMI1BMI2-NEXT: movb $64, %cl
+; X86-BMI1BMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: movl $-1, %eax
+; X86-BMI1BMI2-NEXT: shrxl %ecx, %eax, %edx
+; X86-BMI1BMI2-NEXT: shrdl %cl, %eax, %eax
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB28_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %edx, %eax
+; X86-BMI1BMI2-NEXT: xorl %edx, %edx
+; X86-BMI1BMI2-NEXT: .LBB28_2:
+; X86-BMI1BMI2-NEXT: andl (%esi), %eax
+; X86-BMI1BMI2-NEXT: andl 4(%esi), %edx
+; X86-BMI1BMI2-NEXT: popl %esi
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_c3_load_indexzext:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movb $64, %cl
+; X64-NOBMI-NEXT: subb %sil, %cl
+; X64-NOBMI-NEXT: movq $-1, %rax
+; X64-NOBMI-NEXT: shrq %cl, %rax
+; X64-NOBMI-NEXT: andq (%rdi), %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_c3_load_indexzext:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: movb $64, %al
+; X64-BMI1BMI2-NEXT: subb %sil, %al
+; X64-BMI1BMI2-NEXT: movq $-1, %rcx
+; X64-BMI1BMI2-NEXT: shrxq %rax, %rcx, %rax
+; X64-BMI1BMI2-NEXT: andq (%rdi), %rax
+; X64-BMI1BMI2-NEXT: retq
+ %val = load i64, i64* %w
+ %numhighbits = sub i8 64, %numlowbits
+ %sh_prom = zext i8 %numhighbits to i64
+ %mask = lshr i64 -1, %sh_prom
+ %masked = and i64 %mask, %val
+ ret i64 %masked
+}
+
+define i64 @bzhi64_c4_commutative(i64 %val, i64 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_c4_commutative:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl $64, %ecx
+; X86-NOBMI-NEXT: subl {{[0-9]+}}(%esp), %ecx
+; X86-NOBMI-NEXT: movl $-1, %eax
+; X86-NOBMI-NEXT: movl $-1, %edx
+; X86-NOBMI-NEXT: shrl %cl, %edx
+; X86-NOBMI-NEXT: shrdl %cl, %eax, %eax
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: je .LBB29_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %edx, %eax
+; X86-NOBMI-NEXT: xorl %edx, %edx
+; X86-NOBMI-NEXT: .LBB29_2:
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_c4_commutative:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movl $64, %ecx
+; X86-BMI1BMI2-NEXT: subl {{[0-9]+}}(%esp), %ecx
+; X86-BMI1BMI2-NEXT: movl $-1, %eax
+; X86-BMI1BMI2-NEXT: shrxl %ecx, %eax, %edx
+; X86-BMI1BMI2-NEXT: shrdl %cl, %eax, %eax
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB29_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %edx, %eax
+; X86-BMI1BMI2-NEXT: xorl %edx, %edx
+; X86-BMI1BMI2-NEXT: .LBB29_2:
+; X86-BMI1BMI2-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_c4_commutative:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $64, %ecx
+; X64-NOBMI-NEXT: subl %esi, %ecx
+; X64-NOBMI-NEXT: movq $-1, %rax
+; X64-NOBMI-NEXT: # kill: def $cl killed $cl killed $ecx
+; X64-NOBMI-NEXT: shrq %cl, %rax
+; X64-NOBMI-NEXT: andq %rdi, %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_c4_commutative:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhiq %rsi, %rdi, %rax
+; X64-BMI1BMI2-NEXT: retq
+ %numhighbits = sub i64 64, %numlowbits
+ %mask = lshr i64 -1, %numhighbits
+ %masked = and i64 %val, %mask ; swapped order
+ ret i64 %masked
+}
+
+; ---------------------------------------------------------------------------- ;
+; Pattern d. 32-bit.
+; ---------------------------------------------------------------------------- ;
+
+define i32 @bzhi32_d0(i32 %val, i32 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_d0:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: movl $32, %ecx
+; X86-NOBMI-NEXT: subl {{[0-9]+}}(%esp), %ecx
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: # kill: def $cl killed $cl killed $ecx
+; X86-NOBMI-NEXT: shrl %cl, %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_d0:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: bzhil %eax, {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_d0:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $32, %ecx
+; X64-NOBMI-NEXT: subl %esi, %ecx
+; X64-NOBMI-NEXT: shll %cl, %edi
+; X64-NOBMI-NEXT: # kill: def $cl killed $cl killed $ecx
+; X64-NOBMI-NEXT: shrl %cl, %edi
+; X64-NOBMI-NEXT: movl %edi, %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_d0:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhil %esi, %edi, %eax
+; X64-BMI1BMI2-NEXT: retq
+ %numhighbits = sub i32 32, %numlowbits
+ %highbitscleared = shl i32 %val, %numhighbits
+ %masked = lshr i32 %highbitscleared, %numhighbits
+ ret i32 %masked
+}
+
+define i32 @bzhi32_d1_indexzext(i32 %val, i8 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_d1_indexzext:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: movb $32, %cl
+; X86-NOBMI-NEXT: subb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: shrl %cl, %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_d1_indexzext:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movb $32, %al
+; X86-BMI1BMI2-NEXT: subb {{[0-9]+}}(%esp), %al
+; X86-BMI1BMI2-NEXT: shlxl %eax, {{[0-9]+}}(%esp), %ecx
+; X86-BMI1BMI2-NEXT: shrxl %eax, %ecx, %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_d1_indexzext:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movb $32, %cl
+; X64-NOBMI-NEXT: subb %sil, %cl
+; X64-NOBMI-NEXT: shll %cl, %edi
+; X64-NOBMI-NEXT: shrl %cl, %edi
+; X64-NOBMI-NEXT: movl %edi, %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_d1_indexzext:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: movb $32, %al
+; X64-BMI1BMI2-NEXT: subb %sil, %al
+; X64-BMI1BMI2-NEXT: shlxl %eax, %edi, %ecx
+; X64-BMI1BMI2-NEXT: shrxl %eax, %ecx, %eax
+; X64-BMI1BMI2-NEXT: retq
+ %numhighbits = sub i8 32, %numlowbits
+ %sh_prom = zext i8 %numhighbits to i32
+ %highbitscleared = shl i32 %val, %sh_prom
+ %masked = lshr i32 %highbitscleared, %sh_prom
+ ret i32 %masked
+}
+
+define i32 @bzhi32_d2_load(i32* %w, i32 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_d2_load:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: movl (%eax), %eax
+; X86-NOBMI-NEXT: movl $32, %ecx
+; X86-NOBMI-NEXT: subl {{[0-9]+}}(%esp), %ecx
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: # kill: def $cl killed $cl killed $ecx
+; X86-NOBMI-NEXT: shrl %cl, %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_d2_load:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-BMI1BMI2-NEXT: bzhil %eax, (%ecx), %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_d2_load:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl (%rdi), %eax
+; X64-NOBMI-NEXT: movl $32, %ecx
+; X64-NOBMI-NEXT: subl %esi, %ecx
+; X64-NOBMI-NEXT: shll %cl, %eax
+; X64-NOBMI-NEXT: # kill: def $cl killed $cl killed $ecx
+; X64-NOBMI-NEXT: shrl %cl, %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_d2_load:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhil %esi, (%rdi), %eax
+; X64-BMI1BMI2-NEXT: retq
+ %val = load i32, i32* %w
+ %numhighbits = sub i32 32, %numlowbits
+ %highbitscleared = shl i32 %val, %numhighbits
+ %masked = lshr i32 %highbitscleared, %numhighbits
+ ret i32 %masked
+}
+
+define i32 @bzhi32_d3_load_indexzext(i32* %w, i8 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi32_d3_load_indexzext:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: movl (%eax), %eax
+; X86-NOBMI-NEXT: movb $32, %cl
+; X86-NOBMI-NEXT: subb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: shll %cl, %eax
+; X86-NOBMI-NEXT: shrl %cl, %eax
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi32_d3_load_indexzext:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: movb $32, %cl
+; X86-BMI1BMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: shlxl %ecx, (%eax), %eax
+; X86-BMI1BMI2-NEXT: shrxl %ecx, %eax, %eax
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi32_d3_load_indexzext:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl (%rdi), %eax
+; X64-NOBMI-NEXT: movb $32, %cl
+; X64-NOBMI-NEXT: subb %sil, %cl
+; X64-NOBMI-NEXT: shll %cl, %eax
+; X64-NOBMI-NEXT: shrl %cl, %eax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi32_d3_load_indexzext:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: movb $32, %al
+; X64-BMI1BMI2-NEXT: subb %sil, %al
+; X64-BMI1BMI2-NEXT: shlxl %eax, (%rdi), %ecx
+; X64-BMI1BMI2-NEXT: shrxl %eax, %ecx, %eax
+; X64-BMI1BMI2-NEXT: retq
+ %val = load i32, i32* %w
+ %numhighbits = sub i8 32, %numlowbits
+ %sh_prom = zext i8 %numhighbits to i32
+ %highbitscleared = shl i32 %val, %sh_prom
+ %masked = lshr i32 %highbitscleared, %sh_prom
+ ret i32 %masked
+}
+
+; 64-bit.
+
+define i64 @bzhi64_d0(i64 %val, i64 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_d0:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: pushl %ebx
+; X86-NOBMI-NEXT: pushl %edi
+; X86-NOBMI-NEXT: pushl %esi
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: movl $64, %ecx
+; X86-NOBMI-NEXT: subl {{[0-9]+}}(%esp), %ecx
+; X86-NOBMI-NEXT: movl %edx, %esi
+; X86-NOBMI-NEXT: shll %cl, %esi
+; X86-NOBMI-NEXT: shldl %cl, %edx, %eax
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: movl %esi, %edi
+; X86-NOBMI-NEXT: jne .LBB34_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %eax, %edi
+; X86-NOBMI-NEXT: .LBB34_2:
+; X86-NOBMI-NEXT: movl %edi, %eax
+; X86-NOBMI-NEXT: shrl %cl, %eax
+; X86-NOBMI-NEXT: xorl %ebx, %ebx
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: movl $0, %edx
+; X86-NOBMI-NEXT: jne .LBB34_4
+; X86-NOBMI-NEXT: # %bb.3:
+; X86-NOBMI-NEXT: movl %esi, %ebx
+; X86-NOBMI-NEXT: movl %eax, %edx
+; X86-NOBMI-NEXT: .LBB34_4:
+; X86-NOBMI-NEXT: shrdl %cl, %edi, %ebx
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: jne .LBB34_6
+; X86-NOBMI-NEXT: # %bb.5:
+; X86-NOBMI-NEXT: movl %ebx, %eax
+; X86-NOBMI-NEXT: .LBB34_6:
+; X86-NOBMI-NEXT: popl %esi
+; X86-NOBMI-NEXT: popl %edi
+; X86-NOBMI-NEXT: popl %ebx
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_d0:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: pushl %edi
+; X86-BMI1BMI2-NEXT: pushl %esi
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %esi
+; X86-BMI1BMI2-NEXT: movl $64, %ecx
+; X86-BMI1BMI2-NEXT: subl {{[0-9]+}}(%esp), %ecx
+; X86-BMI1BMI2-NEXT: shldl %cl, %eax, %esi
+; X86-BMI1BMI2-NEXT: shlxl %ecx, %eax, %edi
+; X86-BMI1BMI2-NEXT: xorl %edx, %edx
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB34_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %edi, %esi
+; X86-BMI1BMI2-NEXT: movl $0, %edi
+; X86-BMI1BMI2-NEXT: .LBB34_2:
+; X86-BMI1BMI2-NEXT: shrxl %ecx, %esi, %eax
+; X86-BMI1BMI2-NEXT: jne .LBB34_4
+; X86-BMI1BMI2-NEXT: # %bb.3:
+; X86-BMI1BMI2-NEXT: movl %eax, %edx
+; X86-BMI1BMI2-NEXT: .LBB34_4:
+; X86-BMI1BMI2-NEXT: shrdl %cl, %esi, %edi
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: jne .LBB34_6
+; X86-BMI1BMI2-NEXT: # %bb.5:
+; X86-BMI1BMI2-NEXT: movl %edi, %eax
+; X86-BMI1BMI2-NEXT: .LBB34_6:
+; X86-BMI1BMI2-NEXT: popl %esi
+; X86-BMI1BMI2-NEXT: popl %edi
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_d0:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movl $64, %ecx
+; X64-NOBMI-NEXT: subl %esi, %ecx
+; X64-NOBMI-NEXT: shlq %cl, %rdi
+; X64-NOBMI-NEXT: # kill: def $cl killed $cl killed $ecx
+; X64-NOBMI-NEXT: shrq %cl, %rdi
+; X64-NOBMI-NEXT: movq %rdi, %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_d0:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhiq %rsi, %rdi, %rax
+; X64-BMI1BMI2-NEXT: retq
+ %numhighbits = sub i64 64, %numlowbits
+ %highbitscleared = shl i64 %val, %numhighbits
+ %masked = lshr i64 %highbitscleared, %numhighbits
+ ret i64 %masked
+}
+
+define i64 @bzhi64_d1_indexzext(i64 %val, i8 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_d1_indexzext:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: pushl %ebx
+; X86-NOBMI-NEXT: pushl %edi
+; X86-NOBMI-NEXT: pushl %esi
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %edx
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: movb $64, %cl
+; X86-NOBMI-NEXT: subb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl %edx, %esi
+; X86-NOBMI-NEXT: shll %cl, %esi
+; X86-NOBMI-NEXT: shldl %cl, %edx, %eax
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: movl %esi, %edi
+; X86-NOBMI-NEXT: jne .LBB35_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %eax, %edi
+; X86-NOBMI-NEXT: .LBB35_2:
+; X86-NOBMI-NEXT: movl %edi, %eax
+; X86-NOBMI-NEXT: shrl %cl, %eax
+; X86-NOBMI-NEXT: xorl %ebx, %ebx
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: movl $0, %edx
+; X86-NOBMI-NEXT: jne .LBB35_4
+; X86-NOBMI-NEXT: # %bb.3:
+; X86-NOBMI-NEXT: movl %esi, %ebx
+; X86-NOBMI-NEXT: movl %eax, %edx
+; X86-NOBMI-NEXT: .LBB35_4:
+; X86-NOBMI-NEXT: shrdl %cl, %edi, %ebx
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: jne .LBB35_6
+; X86-NOBMI-NEXT: # %bb.5:
+; X86-NOBMI-NEXT: movl %ebx, %eax
+; X86-NOBMI-NEXT: .LBB35_6:
+; X86-NOBMI-NEXT: popl %esi
+; X86-NOBMI-NEXT: popl %edi
+; X86-NOBMI-NEXT: popl %ebx
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_d1_indexzext:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: pushl %edi
+; X86-BMI1BMI2-NEXT: pushl %esi
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %esi
+; X86-BMI1BMI2-NEXT: movb $64, %cl
+; X86-BMI1BMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: shldl %cl, %eax, %esi
+; X86-BMI1BMI2-NEXT: shlxl %ecx, %eax, %edi
+; X86-BMI1BMI2-NEXT: xorl %edx, %edx
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB35_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %edi, %esi
+; X86-BMI1BMI2-NEXT: movl $0, %edi
+; X86-BMI1BMI2-NEXT: .LBB35_2:
+; X86-BMI1BMI2-NEXT: shrxl %ecx, %esi, %eax
+; X86-BMI1BMI2-NEXT: jne .LBB35_4
+; X86-BMI1BMI2-NEXT: # %bb.3:
+; X86-BMI1BMI2-NEXT: movl %eax, %edx
+; X86-BMI1BMI2-NEXT: .LBB35_4:
+; X86-BMI1BMI2-NEXT: shrdl %cl, %esi, %edi
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: jne .LBB35_6
+; X86-BMI1BMI2-NEXT: # %bb.5:
+; X86-BMI1BMI2-NEXT: movl %edi, %eax
+; X86-BMI1BMI2-NEXT: .LBB35_6:
+; X86-BMI1BMI2-NEXT: popl %esi
+; X86-BMI1BMI2-NEXT: popl %edi
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_d1_indexzext:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movb $64, %cl
+; X64-NOBMI-NEXT: subb %sil, %cl
+; X64-NOBMI-NEXT: shlq %cl, %rdi
+; X64-NOBMI-NEXT: shrq %cl, %rdi
+; X64-NOBMI-NEXT: movq %rdi, %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_d1_indexzext:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: movb $64, %al
+; X64-BMI1BMI2-NEXT: subb %sil, %al
+; X64-BMI1BMI2-NEXT: shlxq %rax, %rdi, %rcx
+; X64-BMI1BMI2-NEXT: shrxq %rax, %rcx, %rax
+; X64-BMI1BMI2-NEXT: retq
+ %numhighbits = sub i8 64, %numlowbits
+ %sh_prom = zext i8 %numhighbits to i64
+ %highbitscleared = shl i64 %val, %sh_prom
+ %masked = lshr i64 %highbitscleared, %sh_prom
+ ret i64 %masked
+}
+
+define i64 @bzhi64_d2_load(i64* %w, i64 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_d2_load:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: pushl %ebx
+; X86-NOBMI-NEXT: pushl %edi
+; X86-NOBMI-NEXT: pushl %esi
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: movl (%eax), %edx
+; X86-NOBMI-NEXT: movl 4(%eax), %eax
+; X86-NOBMI-NEXT: movl $64, %ecx
+; X86-NOBMI-NEXT: subl {{[0-9]+}}(%esp), %ecx
+; X86-NOBMI-NEXT: movl %edx, %esi
+; X86-NOBMI-NEXT: shll %cl, %esi
+; X86-NOBMI-NEXT: shldl %cl, %edx, %eax
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: movl %esi, %edi
+; X86-NOBMI-NEXT: jne .LBB36_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %eax, %edi
+; X86-NOBMI-NEXT: .LBB36_2:
+; X86-NOBMI-NEXT: movl %edi, %eax
+; X86-NOBMI-NEXT: shrl %cl, %eax
+; X86-NOBMI-NEXT: xorl %ebx, %ebx
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: movl $0, %edx
+; X86-NOBMI-NEXT: jne .LBB36_4
+; X86-NOBMI-NEXT: # %bb.3:
+; X86-NOBMI-NEXT: movl %esi, %ebx
+; X86-NOBMI-NEXT: movl %eax, %edx
+; X86-NOBMI-NEXT: .LBB36_4:
+; X86-NOBMI-NEXT: shrdl %cl, %edi, %ebx
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: jne .LBB36_6
+; X86-NOBMI-NEXT: # %bb.5:
+; X86-NOBMI-NEXT: movl %ebx, %eax
+; X86-NOBMI-NEXT: .LBB36_6:
+; X86-NOBMI-NEXT: popl %esi
+; X86-NOBMI-NEXT: popl %edi
+; X86-NOBMI-NEXT: popl %ebx
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_d2_load:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: pushl %edi
+; X86-BMI1BMI2-NEXT: pushl %esi
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: movl (%eax), %edx
+; X86-BMI1BMI2-NEXT: movl 4(%eax), %esi
+; X86-BMI1BMI2-NEXT: movl $64, %ecx
+; X86-BMI1BMI2-NEXT: subl {{[0-9]+}}(%esp), %ecx
+; X86-BMI1BMI2-NEXT: shldl %cl, %edx, %esi
+; X86-BMI1BMI2-NEXT: shlxl %ecx, %edx, %edi
+; X86-BMI1BMI2-NEXT: xorl %edx, %edx
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB36_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %edi, %esi
+; X86-BMI1BMI2-NEXT: movl $0, %edi
+; X86-BMI1BMI2-NEXT: .LBB36_2:
+; X86-BMI1BMI2-NEXT: shrxl %ecx, %esi, %eax
+; X86-BMI1BMI2-NEXT: jne .LBB36_4
+; X86-BMI1BMI2-NEXT: # %bb.3:
+; X86-BMI1BMI2-NEXT: movl %eax, %edx
+; X86-BMI1BMI2-NEXT: .LBB36_4:
+; X86-BMI1BMI2-NEXT: shrdl %cl, %esi, %edi
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: jne .LBB36_6
+; X86-BMI1BMI2-NEXT: # %bb.5:
+; X86-BMI1BMI2-NEXT: movl %edi, %eax
+; X86-BMI1BMI2-NEXT: .LBB36_6:
+; X86-BMI1BMI2-NEXT: popl %esi
+; X86-BMI1BMI2-NEXT: popl %edi
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_d2_load:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movq (%rdi), %rax
+; X64-NOBMI-NEXT: movl $64, %ecx
+; X64-NOBMI-NEXT: subl %esi, %ecx
+; X64-NOBMI-NEXT: shlq %cl, %rax
+; X64-NOBMI-NEXT: # kill: def $cl killed $cl killed $ecx
+; X64-NOBMI-NEXT: shrq %cl, %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_d2_load:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: bzhiq %rsi, (%rdi), %rax
+; X64-BMI1BMI2-NEXT: retq
+ %val = load i64, i64* %w
+ %numhighbits = sub i64 64, %numlowbits
+ %highbitscleared = shl i64 %val, %numhighbits
+ %masked = lshr i64 %highbitscleared, %numhighbits
+ ret i64 %masked
+}
+
+define i64 @bzhi64_d3_load_indexzext(i64* %w, i8 %numlowbits) nounwind {
+; X86-NOBMI-LABEL: bzhi64_d3_load_indexzext:
+; X86-NOBMI: # %bb.0:
+; X86-NOBMI-NEXT: pushl %ebx
+; X86-NOBMI-NEXT: pushl %edi
+; X86-NOBMI-NEXT: pushl %esi
+; X86-NOBMI-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NOBMI-NEXT: movl (%eax), %edx
+; X86-NOBMI-NEXT: movl 4(%eax), %eax
+; X86-NOBMI-NEXT: movb $64, %cl
+; X86-NOBMI-NEXT: subb {{[0-9]+}}(%esp), %cl
+; X86-NOBMI-NEXT: movl %edx, %esi
+; X86-NOBMI-NEXT: shll %cl, %esi
+; X86-NOBMI-NEXT: shldl %cl, %edx, %eax
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: movl %esi, %edi
+; X86-NOBMI-NEXT: jne .LBB37_2
+; X86-NOBMI-NEXT: # %bb.1:
+; X86-NOBMI-NEXT: movl %eax, %edi
+; X86-NOBMI-NEXT: .LBB37_2:
+; X86-NOBMI-NEXT: movl %edi, %eax
+; X86-NOBMI-NEXT: shrl %cl, %eax
+; X86-NOBMI-NEXT: xorl %ebx, %ebx
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: movl $0, %edx
+; X86-NOBMI-NEXT: jne .LBB37_4
+; X86-NOBMI-NEXT: # %bb.3:
+; X86-NOBMI-NEXT: movl %esi, %ebx
+; X86-NOBMI-NEXT: movl %eax, %edx
+; X86-NOBMI-NEXT: .LBB37_4:
+; X86-NOBMI-NEXT: shrdl %cl, %edi, %ebx
+; X86-NOBMI-NEXT: testb $32, %cl
+; X86-NOBMI-NEXT: jne .LBB37_6
+; X86-NOBMI-NEXT: # %bb.5:
+; X86-NOBMI-NEXT: movl %ebx, %eax
+; X86-NOBMI-NEXT: .LBB37_6:
+; X86-NOBMI-NEXT: popl %esi
+; X86-NOBMI-NEXT: popl %edi
+; X86-NOBMI-NEXT: popl %ebx
+; X86-NOBMI-NEXT: retl
+;
+; X86-BMI1BMI2-LABEL: bzhi64_d3_load_indexzext:
+; X86-BMI1BMI2: # %bb.0:
+; X86-BMI1BMI2-NEXT: pushl %edi
+; X86-BMI1BMI2-NEXT: pushl %esi
+; X86-BMI1BMI2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-BMI1BMI2-NEXT: movl (%eax), %edx
+; X86-BMI1BMI2-NEXT: movl 4(%eax), %esi
+; X86-BMI1BMI2-NEXT: movb $64, %cl
+; X86-BMI1BMI2-NEXT: subb {{[0-9]+}}(%esp), %cl
+; X86-BMI1BMI2-NEXT: shldl %cl, %edx, %esi
+; X86-BMI1BMI2-NEXT: shlxl %ecx, %edx, %edi
+; X86-BMI1BMI2-NEXT: xorl %edx, %edx
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: je .LBB37_2
+; X86-BMI1BMI2-NEXT: # %bb.1:
+; X86-BMI1BMI2-NEXT: movl %edi, %esi
+; X86-BMI1BMI2-NEXT: movl $0, %edi
+; X86-BMI1BMI2-NEXT: .LBB37_2:
+; X86-BMI1BMI2-NEXT: shrxl %ecx, %esi, %eax
+; X86-BMI1BMI2-NEXT: jne .LBB37_4
+; X86-BMI1BMI2-NEXT: # %bb.3:
+; X86-BMI1BMI2-NEXT: movl %eax, %edx
+; X86-BMI1BMI2-NEXT: .LBB37_4:
+; X86-BMI1BMI2-NEXT: shrdl %cl, %esi, %edi
+; X86-BMI1BMI2-NEXT: testb $32, %cl
+; X86-BMI1BMI2-NEXT: jne .LBB37_6
+; X86-BMI1BMI2-NEXT: # %bb.5:
+; X86-BMI1BMI2-NEXT: movl %edi, %eax
+; X86-BMI1BMI2-NEXT: .LBB37_6:
+; X86-BMI1BMI2-NEXT: popl %esi
+; X86-BMI1BMI2-NEXT: popl %edi
+; X86-BMI1BMI2-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_d3_load_indexzext:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movq (%rdi), %rax
+; X64-NOBMI-NEXT: movb $64, %cl
+; X64-NOBMI-NEXT: subb %sil, %cl
+; X64-NOBMI-NEXT: shlq %cl, %rax
+; X64-NOBMI-NEXT: shrq %cl, %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1BMI2-LABEL: bzhi64_d3_load_indexzext:
+; X64-BMI1BMI2: # %bb.0:
+; X64-BMI1BMI2-NEXT: movb $64, %al
+; X64-BMI1BMI2-NEXT: subb %sil, %al
+; X64-BMI1BMI2-NEXT: shlxq %rax, (%rdi), %rcx
+; X64-BMI1BMI2-NEXT: shrxq %rax, %rcx, %rax
+; X64-BMI1BMI2-NEXT: retq
+ %val = load i64, i64* %w
+ %numhighbits = sub i8 64, %numlowbits
+ %sh_prom = zext i8 %numhighbits to i64
+ %highbitscleared = shl i64 %val, %sh_prom
+ %masked = lshr i64 %highbitscleared, %sh_prom
+ ret i64 %masked
+}
+
+; ---------------------------------------------------------------------------- ;
+; Constant mask
+; ---------------------------------------------------------------------------- ;
+
+; 32-bit
+
+define i32 @bzhi32_constant_mask32(i32 %val) nounwind {
+; X86-LABEL: bzhi32_constant_mask32:
+; X86: # %bb.0:
+; X86-NEXT: movl $2147483647, %eax # imm = 0x7FFFFFFF
+; X86-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: retl
+;
+; X64-LABEL: bzhi32_constant_mask32:
+; X64: # %bb.0:
+; X64-NEXT: andl $2147483647, %edi # imm = 0x7FFFFFFF
+; X64-NEXT: movl %edi, %eax
+; X64-NEXT: retq
+ %masked = and i32 %val, 2147483647
+ ret i32 %masked
+}
+
+define i32 @bzhi32_constant_mask32_load(i32* %val) nounwind {
+; X86-LABEL: bzhi32_constant_mask32_load:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movl $2147483647, %eax # imm = 0x7FFFFFFF
+; X86-NEXT: andl (%ecx), %eax
+; X86-NEXT: retl
+;
+; X64-LABEL: bzhi32_constant_mask32_load:
+; X64: # %bb.0:
+; X64-NEXT: movl $2147483647, %eax # imm = 0x7FFFFFFF
+; X64-NEXT: andl (%rdi), %eax
+; X64-NEXT: retq
+ %val1 = load i32, i32* %val
+ %masked = and i32 %val1, 2147483647
+ ret i32 %masked
+}
+
+define i32 @bzhi32_constant_mask16(i32 %val) nounwind {
+; X86-LABEL: bzhi32_constant_mask16:
+; X86: # %bb.0:
+; X86-NEXT: movl $32767, %eax # imm = 0x7FFF
+; X86-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: retl
+;
+; X64-LABEL: bzhi32_constant_mask16:
+; X64: # %bb.0:
+; X64-NEXT: andl $32767, %edi # imm = 0x7FFF
+; X64-NEXT: movl %edi, %eax
+; X64-NEXT: retq
+ %masked = and i32 %val, 32767
+ ret i32 %masked
+}
+
+define i32 @bzhi32_constant_mask16_load(i32* %val) nounwind {
+; X86-LABEL: bzhi32_constant_mask16_load:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movl $32767, %eax # imm = 0x7FFF
+; X86-NEXT: andl (%ecx), %eax
+; X86-NEXT: retl
+;
+; X64-LABEL: bzhi32_constant_mask16_load:
+; X64: # %bb.0:
+; X64-NEXT: movl $32767, %eax # imm = 0x7FFF
+; X64-NEXT: andl (%rdi), %eax
+; X64-NEXT: retq
+ %val1 = load i32, i32* %val
+ %masked = and i32 %val1, 32767
+ ret i32 %masked
+}
+
+define i32 @bzhi32_constant_mask8(i32 %val) nounwind {
+; X86-LABEL: bzhi32_constant_mask8:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: andl $127, %eax
+; X86-NEXT: retl
+;
+; X64-LABEL: bzhi32_constant_mask8:
+; X64: # %bb.0:
+; X64-NEXT: andl $127, %edi
+; X64-NEXT: movl %edi, %eax
+; X64-NEXT: retq
+ %masked = and i32 %val, 127
+ ret i32 %masked
+}
+
+define i32 @bzhi32_constant_mask8_load(i32* %val) nounwind {
+; X86-LABEL: bzhi32_constant_mask8_load:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl (%eax), %eax
+; X86-NEXT: andl $127, %eax
+; X86-NEXT: retl
+;
+; X64-LABEL: bzhi32_constant_mask8_load:
+; X64: # %bb.0:
+; X64-NEXT: movl (%rdi), %eax
+; X64-NEXT: andl $127, %eax
+; X64-NEXT: retq
+ %val1 = load i32, i32* %val
+ %masked = and i32 %val1, 127
+ ret i32 %masked
+}
+
+; 64-bit
+
+define i64 @bzhi64_constant_mask64(i64 %val) nounwind {
+; X86-LABEL: bzhi64_constant_mask64:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl $1073741823, %edx # imm = 0x3FFFFFFF
+; X86-NEXT: andl {{[0-9]+}}(%esp), %edx
+; X86-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_constant_mask64:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movabsq $4611686018427387903, %rax # imm = 0x3FFFFFFFFFFFFFFF
+; X64-NOBMI-NEXT: andq %rdi, %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1TBM-LABEL: bzhi64_constant_mask64:
+; X64-BMI1TBM: # %bb.0:
+; X64-BMI1TBM-NEXT: bextrq $15872, %rdi, %rax # imm = 0x3E00
+; X64-BMI1TBM-NEXT: retq
+;
+; X64-BMI1NOTBMBMI2-LABEL: bzhi64_constant_mask64:
+; X64-BMI1NOTBMBMI2: # %bb.0:
+; X64-BMI1NOTBMBMI2-NEXT: movb $62, %al
+; X64-BMI1NOTBMBMI2-NEXT: bzhiq %rax, %rdi, %rax
+; X64-BMI1NOTBMBMI2-NEXT: retq
+ %masked = and i64 %val, 4611686018427387903
+ ret i64 %masked
+}
+
+define i64 @bzhi64_constant_mask64_load(i64* %val) nounwind {
+; X86-LABEL: bzhi64_constant_mask64_load:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movl (%ecx), %eax
+; X86-NEXT: movl $1073741823, %edx # imm = 0x3FFFFFFF
+; X86-NEXT: andl 4(%ecx), %edx
+; X86-NEXT: retl
+;
+; X64-NOBMI-LABEL: bzhi64_constant_mask64_load:
+; X64-NOBMI: # %bb.0:
+; X64-NOBMI-NEXT: movabsq $4611686018427387903, %rax # imm = 0x3FFFFFFFFFFFFFFF
+; X64-NOBMI-NEXT: andq (%rdi), %rax
+; X64-NOBMI-NEXT: retq
+;
+; X64-BMI1TBM-LABEL: bzhi64_constant_mask64_load:
+; X64-BMI1TBM: # %bb.0:
+; X64-BMI1TBM-NEXT: bextrq $15872, (%rdi), %rax # imm = 0x3E00
+; X64-BMI1TBM-NEXT: retq
+;
+; X64-BMI1NOTBMBMI2-LABEL: bzhi64_constant_mask64_load:
+; X64-BMI1NOTBMBMI2: # %bb.0:
+; X64-BMI1NOTBMBMI2-NEXT: movb $62, %al
+; X64-BMI1NOTBMBMI2-NEXT: bzhiq %rax, (%rdi), %rax
+; X64-BMI1NOTBMBMI2-NEXT: retq
+ %val1 = load i64, i64* %val
+ %masked = and i64 %val1, 4611686018427387903
+ ret i64 %masked
+}
+
+define i64 @bzhi64_constant_mask32(i64 %val) nounwind {
+; X86-LABEL: bzhi64_constant_mask32:
+; X86: # %bb.0:
+; X86-NEXT: movl $2147483647, %eax # imm = 0x7FFFFFFF
+; X86-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: xorl %edx, %edx
+; X86-NEXT: retl
+;
+; X64-LABEL: bzhi64_constant_mask32:
+; X64: # %bb.0:
+; X64-NEXT: andl $2147483647, %edi # imm = 0x7FFFFFFF
+; X64-NEXT: movq %rdi, %rax
+; X64-NEXT: retq
+ %masked = and i64 %val, 2147483647
+ ret i64 %masked
+}
+
+define i64 @bzhi64_constant_mask32_load(i64* %val) nounwind {
+; X86-LABEL: bzhi64_constant_mask32_load:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movl $2147483647, %eax # imm = 0x7FFFFFFF
+; X86-NEXT: andl (%ecx), %eax
+; X86-NEXT: xorl %edx, %edx
+; X86-NEXT: retl
+;
+; X64-LABEL: bzhi64_constant_mask32_load:
+; X64: # %bb.0:
+; X64-NEXT: movq (%rdi), %rax
+; X64-NEXT: andl $2147483647, %eax # imm = 0x7FFFFFFF
+; X64-NEXT: retq
+ %val1 = load i64, i64* %val
+ %masked = and i64 %val1, 2147483647
+ ret i64 %masked
+}
+
+define i64 @bzhi64_constant_mask16(i64 %val) nounwind {
+; X86-LABEL: bzhi64_constant_mask16:
+; X86: # %bb.0:
+; X86-NEXT: movl $32767, %eax # imm = 0x7FFF
+; X86-NEXT: andl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: xorl %edx, %edx
+; X86-NEXT: retl
+;
+; X64-LABEL: bzhi64_constant_mask16:
+; X64: # %bb.0:
+; X64-NEXT: andl $32767, %edi # imm = 0x7FFF
+; X64-NEXT: movq %rdi, %rax
+; X64-NEXT: retq
+ %masked = and i64 %val, 32767
+ ret i64 %masked
+}
+
+define i64 @bzhi64_constant_mask16_load(i64* %val) nounwind {
+; X86-LABEL: bzhi64_constant_mask16_load:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movl $32767, %eax # imm = 0x7FFF
+; X86-NEXT: andl (%ecx), %eax
+; X86-NEXT: xorl %edx, %edx
+; X86-NEXT: retl
+;
+; X64-LABEL: bzhi64_constant_mask16_load:
+; X64: # %bb.0:
+; X64-NEXT: movq (%rdi), %rax
+; X64-NEXT: andl $32767, %eax # imm = 0x7FFF
+; X64-NEXT: retq
+ %val1 = load i64, i64* %val
+ %masked = and i64 %val1, 32767
+ ret i64 %masked
+}
+
+define i64 @bzhi64_constant_mask8(i64 %val) nounwind {
+; X86-LABEL: bzhi64_constant_mask8:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: andl $127, %eax
+; X86-NEXT: xorl %edx, %edx
+; X86-NEXT: retl
+;
+; X64-LABEL: bzhi64_constant_mask8:
+; X64: # %bb.0:
+; X64-NEXT: andl $127, %edi
+; X64-NEXT: movq %rdi, %rax
+; X64-NEXT: retq
+ %masked = and i64 %val, 127
+ ret i64 %masked
+}
+
+define i64 @bzhi64_constant_mask8_load(i64* %val) nounwind {
+; X86-LABEL: bzhi64_constant_mask8_load:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl (%eax), %eax
+; X86-NEXT: andl $127, %eax
+; X86-NEXT: xorl %edx, %edx
+; X86-NEXT: retl
+;
+; X64-LABEL: bzhi64_constant_mask8_load:
+; X64: # %bb.0:
+; X64-NEXT: movq (%rdi), %rax
+; X64-NEXT: andl $127, %eax
+; X64-NEXT: retq
+ %val1 = load i64, i64* %val
+ %masked = and i64 %val1, 127
+ ret i64 %masked
+}
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