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-rw-r--r--llvm/test/CodeGen/X86/memcmp.ll1685
1 files changed, 1685 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/memcmp.ll b/llvm/test/CodeGen/X86/memcmp.ll
new file mode 100644
index 00000000000..8a7c7847fe0
--- /dev/null
+++ b/llvm/test/CodeGen/X86/memcmp.ll
@@ -0,0 +1,1685 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=cmov | FileCheck %s --check-prefix=X86 --check-prefix=X86-NOSSE
+; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=+sse | FileCheck %s --check-prefix=X86 --check-prefix=SSE --check-prefix=X86-SSE1
+; RUN: llc < %s -mtriple=i686-unknown-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X86 --check-prefix=SSE --check-prefix=X86-SSE2
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown | FileCheck %s --check-prefix=X64 --check-prefix=X64-SSE2
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=avx | FileCheck %s --check-prefix=X64 --check-prefix=X64-AVX --check-prefix=X64-AVX1
+; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=avx2 | FileCheck %s --check-prefix=X64 --check-prefix=X64-AVX --check-prefix=X64-AVX2
+
+; This tests codegen time inlining/optimization of memcmp
+; rdar://6480398
+
+@.str = private constant [65 x i8] c"0123456789012345678901234567890123456789012345678901234567890123\00", align 1
+
+declare i32 @memcmp(i8*, i8*, i64)
+
+define i32 @length0(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length0:
+; X86: # %bb.0:
+; X86-NEXT: xorl %eax, %eax
+; X86-NEXT: retl
+;
+; X64-LABEL: length0:
+; X64: # %bb.0:
+; X64-NEXT: xorl %eax, %eax
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 0) nounwind
+ ret i32 %m
+ }
+
+define i1 @length0_eq(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length0_eq:
+; X86: # %bb.0:
+; X86-NEXT: movb $1, %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length0_eq:
+; X64: # %bb.0:
+; X64-NEXT: movb $1, %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 0) nounwind
+ %c = icmp eq i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length0_lt(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length0_lt:
+; X86: # %bb.0:
+; X86-NEXT: xorl %eax, %eax
+; X86-NEXT: retl
+;
+; X64-LABEL: length0_lt:
+; X64: # %bb.0:
+; X64-NEXT: xorl %eax, %eax
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 0) nounwind
+ %c = icmp slt i32 %m, 0
+ ret i1 %c
+}
+
+define i32 @length2(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length2:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movzwl (%ecx), %ecx
+; X86-NEXT: movzwl (%eax), %edx
+; X86-NEXT: rolw $8, %cx
+; X86-NEXT: rolw $8, %dx
+; X86-NEXT: movzwl %cx, %eax
+; X86-NEXT: movzwl %dx, %ecx
+; X86-NEXT: subl %ecx, %eax
+; X86-NEXT: retl
+;
+; X64-LABEL: length2:
+; X64: # %bb.0:
+; X64-NEXT: movzwl (%rdi), %eax
+; X64-NEXT: movzwl (%rsi), %ecx
+; X64-NEXT: rolw $8, %ax
+; X64-NEXT: rolw $8, %cx
+; X64-NEXT: movzwl %ax, %eax
+; X64-NEXT: movzwl %cx, %ecx
+; X64-NEXT: subl %ecx, %eax
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 2) nounwind
+ ret i32 %m
+}
+
+define i1 @length2_eq(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length2_eq:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movzwl (%ecx), %ecx
+; X86-NEXT: cmpw (%eax), %cx
+; X86-NEXT: sete %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length2_eq:
+; X64: # %bb.0:
+; X64-NEXT: movzwl (%rdi), %eax
+; X64-NEXT: cmpw (%rsi), %ax
+; X64-NEXT: sete %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 2) nounwind
+ %c = icmp eq i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length2_lt(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length2_lt:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movzwl (%ecx), %ecx
+; X86-NEXT: movzwl (%eax), %edx
+; X86-NEXT: rolw $8, %cx
+; X86-NEXT: rolw $8, %dx
+; X86-NEXT: movzwl %cx, %eax
+; X86-NEXT: movzwl %dx, %ecx
+; X86-NEXT: subl %ecx, %eax
+; X86-NEXT: shrl $31, %eax
+; X86-NEXT: # kill: def $al killed $al killed $eax
+; X86-NEXT: retl
+;
+; X64-LABEL: length2_lt:
+; X64: # %bb.0:
+; X64-NEXT: movzwl (%rdi), %eax
+; X64-NEXT: movzwl (%rsi), %ecx
+; X64-NEXT: rolw $8, %ax
+; X64-NEXT: rolw $8, %cx
+; X64-NEXT: movzwl %ax, %eax
+; X64-NEXT: movzwl %cx, %ecx
+; X64-NEXT: subl %ecx, %eax
+; X64-NEXT: shrl $31, %eax
+; X64-NEXT: # kill: def $al killed $al killed $eax
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 2) nounwind
+ %c = icmp slt i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length2_gt(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length2_gt:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movzwl (%ecx), %ecx
+; X86-NEXT: movzwl (%eax), %eax
+; X86-NEXT: rolw $8, %cx
+; X86-NEXT: rolw $8, %ax
+; X86-NEXT: movzwl %cx, %ecx
+; X86-NEXT: movzwl %ax, %eax
+; X86-NEXT: subl %eax, %ecx
+; X86-NEXT: testl %ecx, %ecx
+; X86-NEXT: setg %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length2_gt:
+; X64: # %bb.0:
+; X64-NEXT: movzwl (%rdi), %eax
+; X64-NEXT: movzwl (%rsi), %ecx
+; X64-NEXT: rolw $8, %ax
+; X64-NEXT: rolw $8, %cx
+; X64-NEXT: movzwl %ax, %eax
+; X64-NEXT: movzwl %cx, %ecx
+; X64-NEXT: subl %ecx, %eax
+; X64-NEXT: testl %eax, %eax
+; X64-NEXT: setg %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 2) nounwind
+ %c = icmp sgt i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length2_eq_const(i8* %X) nounwind {
+; X86-LABEL: length2_eq_const:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movzwl (%eax), %eax
+; X86-NEXT: cmpl $12849, %eax # imm = 0x3231
+; X86-NEXT: setne %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length2_eq_const:
+; X64: # %bb.0:
+; X64-NEXT: movzwl (%rdi), %eax
+; X64-NEXT: cmpl $12849, %eax # imm = 0x3231
+; X64-NEXT: setne %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([65 x i8], [65 x i8]* @.str, i32 0, i32 1), i64 2) nounwind
+ %c = icmp ne i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length2_eq_nobuiltin_attr(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length2_eq_nobuiltin_attr:
+; X86: # %bb.0:
+; X86-NEXT: pushl $0
+; X86-NEXT: pushl $2
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: testl %eax, %eax
+; X86-NEXT: sete %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length2_eq_nobuiltin_attr:
+; X64: # %bb.0:
+; X64-NEXT: pushq %rax
+; X64-NEXT: movl $2, %edx
+; X64-NEXT: callq memcmp
+; X64-NEXT: testl %eax, %eax
+; X64-NEXT: sete %al
+; X64-NEXT: popq %rcx
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 2) nounwind nobuiltin
+ %c = icmp eq i32 %m, 0
+ ret i1 %c
+}
+
+define i32 @length3(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length3:
+; X86: # %bb.0: # %loadbb
+; X86-NEXT: pushl %esi
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movzwl (%eax), %edx
+; X86-NEXT: movzwl (%ecx), %esi
+; X86-NEXT: rolw $8, %dx
+; X86-NEXT: rolw $8, %si
+; X86-NEXT: cmpw %si, %dx
+; X86-NEXT: jne .LBB9_1
+; X86-NEXT: # %bb.2: # %loadbb1
+; X86-NEXT: movzbl 2(%eax), %eax
+; X86-NEXT: movzbl 2(%ecx), %ecx
+; X86-NEXT: subl %ecx, %eax
+; X86-NEXT: popl %esi
+; X86-NEXT: retl
+; X86-NEXT: .LBB9_1: # %res_block
+; X86-NEXT: setae %al
+; X86-NEXT: movzbl %al, %eax
+; X86-NEXT: leal -1(%eax,%eax), %eax
+; X86-NEXT: popl %esi
+; X86-NEXT: retl
+;
+; X64-LABEL: length3:
+; X64: # %bb.0: # %loadbb
+; X64-NEXT: movzwl (%rdi), %eax
+; X64-NEXT: movzwl (%rsi), %ecx
+; X64-NEXT: rolw $8, %ax
+; X64-NEXT: rolw $8, %cx
+; X64-NEXT: cmpw %cx, %ax
+; X64-NEXT: jne .LBB9_1
+; X64-NEXT: # %bb.2: # %loadbb1
+; X64-NEXT: movzbl 2(%rdi), %eax
+; X64-NEXT: movzbl 2(%rsi), %ecx
+; X64-NEXT: subl %ecx, %eax
+; X64-NEXT: retq
+; X64-NEXT: .LBB9_1: # %res_block
+; X64-NEXT: setae %al
+; X64-NEXT: movzbl %al, %eax
+; X64-NEXT: leal -1(%rax,%rax), %eax
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 3) nounwind
+ ret i32 %m
+}
+
+define i1 @length3_eq(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length3_eq:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movzwl (%ecx), %edx
+; X86-NEXT: xorw (%eax), %dx
+; X86-NEXT: movb 2(%ecx), %cl
+; X86-NEXT: xorb 2(%eax), %cl
+; X86-NEXT: movzbl %cl, %eax
+; X86-NEXT: orw %dx, %ax
+; X86-NEXT: setne %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length3_eq:
+; X64: # %bb.0:
+; X64-NEXT: movzwl (%rdi), %eax
+; X64-NEXT: xorw (%rsi), %ax
+; X64-NEXT: movb 2(%rdi), %cl
+; X64-NEXT: xorb 2(%rsi), %cl
+; X64-NEXT: movzbl %cl, %ecx
+; X64-NEXT: orw %ax, %cx
+; X64-NEXT: setne %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 3) nounwind
+ %c = icmp ne i32 %m, 0
+ ret i1 %c
+}
+
+define i32 @length4(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length4:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movl (%ecx), %ecx
+; X86-NEXT: movl (%eax), %edx
+; X86-NEXT: bswapl %ecx
+; X86-NEXT: bswapl %edx
+; X86-NEXT: xorl %eax, %eax
+; X86-NEXT: cmpl %edx, %ecx
+; X86-NEXT: seta %al
+; X86-NEXT: sbbl $0, %eax
+; X86-NEXT: retl
+;
+; X64-LABEL: length4:
+; X64: # %bb.0:
+; X64-NEXT: movl (%rdi), %ecx
+; X64-NEXT: movl (%rsi), %edx
+; X64-NEXT: bswapl %ecx
+; X64-NEXT: bswapl %edx
+; X64-NEXT: xorl %eax, %eax
+; X64-NEXT: cmpl %edx, %ecx
+; X64-NEXT: seta %al
+; X64-NEXT: sbbl $0, %eax
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 4) nounwind
+ ret i32 %m
+}
+
+define i1 @length4_eq(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length4_eq:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movl (%ecx), %ecx
+; X86-NEXT: cmpl (%eax), %ecx
+; X86-NEXT: setne %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length4_eq:
+; X64: # %bb.0:
+; X64-NEXT: movl (%rdi), %eax
+; X64-NEXT: cmpl (%rsi), %eax
+; X64-NEXT: setne %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 4) nounwind
+ %c = icmp ne i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length4_lt(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length4_lt:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movl (%ecx), %ecx
+; X86-NEXT: movl (%eax), %edx
+; X86-NEXT: bswapl %ecx
+; X86-NEXT: bswapl %edx
+; X86-NEXT: xorl %eax, %eax
+; X86-NEXT: cmpl %edx, %ecx
+; X86-NEXT: seta %al
+; X86-NEXT: sbbl $0, %eax
+; X86-NEXT: shrl $31, %eax
+; X86-NEXT: # kill: def $al killed $al killed $eax
+; X86-NEXT: retl
+;
+; X64-LABEL: length4_lt:
+; X64: # %bb.0:
+; X64-NEXT: movl (%rdi), %ecx
+; X64-NEXT: movl (%rsi), %edx
+; X64-NEXT: bswapl %ecx
+; X64-NEXT: bswapl %edx
+; X64-NEXT: xorl %eax, %eax
+; X64-NEXT: cmpl %edx, %ecx
+; X64-NEXT: seta %al
+; X64-NEXT: sbbl $0, %eax
+; X64-NEXT: shrl $31, %eax
+; X64-NEXT: # kill: def $al killed $al killed $eax
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 4) nounwind
+ %c = icmp slt i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length4_gt(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length4_gt:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movl (%ecx), %ecx
+; X86-NEXT: movl (%eax), %eax
+; X86-NEXT: bswapl %ecx
+; X86-NEXT: bswapl %eax
+; X86-NEXT: xorl %edx, %edx
+; X86-NEXT: cmpl %eax, %ecx
+; X86-NEXT: seta %dl
+; X86-NEXT: sbbl $0, %edx
+; X86-NEXT: testl %edx, %edx
+; X86-NEXT: setg %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length4_gt:
+; X64: # %bb.0:
+; X64-NEXT: movl (%rdi), %eax
+; X64-NEXT: movl (%rsi), %ecx
+; X64-NEXT: bswapl %eax
+; X64-NEXT: bswapl %ecx
+; X64-NEXT: xorl %edx, %edx
+; X64-NEXT: cmpl %ecx, %eax
+; X64-NEXT: seta %dl
+; X64-NEXT: sbbl $0, %edx
+; X64-NEXT: testl %edx, %edx
+; X64-NEXT: setg %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 4) nounwind
+ %c = icmp sgt i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length4_eq_const(i8* %X) nounwind {
+; X86-LABEL: length4_eq_const:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: cmpl $875770417, (%eax) # imm = 0x34333231
+; X86-NEXT: sete %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length4_eq_const:
+; X64: # %bb.0:
+; X64-NEXT: cmpl $875770417, (%rdi) # imm = 0x34333231
+; X64-NEXT: sete %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([65 x i8], [65 x i8]* @.str, i32 0, i32 1), i64 4) nounwind
+ %c = icmp eq i32 %m, 0
+ ret i1 %c
+}
+
+define i32 @length5(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length5:
+; X86: # %bb.0: # %loadbb
+; X86-NEXT: pushl %esi
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl (%eax), %edx
+; X86-NEXT: movl (%ecx), %esi
+; X86-NEXT: bswapl %edx
+; X86-NEXT: bswapl %esi
+; X86-NEXT: cmpl %esi, %edx
+; X86-NEXT: jne .LBB16_1
+; X86-NEXT: # %bb.2: # %loadbb1
+; X86-NEXT: movzbl 4(%eax), %eax
+; X86-NEXT: movzbl 4(%ecx), %ecx
+; X86-NEXT: subl %ecx, %eax
+; X86-NEXT: popl %esi
+; X86-NEXT: retl
+; X86-NEXT: .LBB16_1: # %res_block
+; X86-NEXT: setae %al
+; X86-NEXT: movzbl %al, %eax
+; X86-NEXT: leal -1(%eax,%eax), %eax
+; X86-NEXT: popl %esi
+; X86-NEXT: retl
+;
+; X64-LABEL: length5:
+; X64: # %bb.0: # %loadbb
+; X64-NEXT: movl (%rdi), %eax
+; X64-NEXT: movl (%rsi), %ecx
+; X64-NEXT: bswapl %eax
+; X64-NEXT: bswapl %ecx
+; X64-NEXT: cmpl %ecx, %eax
+; X64-NEXT: jne .LBB16_1
+; X64-NEXT: # %bb.2: # %loadbb1
+; X64-NEXT: movzbl 4(%rdi), %eax
+; X64-NEXT: movzbl 4(%rsi), %ecx
+; X64-NEXT: subl %ecx, %eax
+; X64-NEXT: retq
+; X64-NEXT: .LBB16_1: # %res_block
+; X64-NEXT: setae %al
+; X64-NEXT: movzbl %al, %eax
+; X64-NEXT: leal -1(%rax,%rax), %eax
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 5) nounwind
+ ret i32 %m
+}
+
+define i1 @length5_eq(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length5_eq:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movl (%ecx), %edx
+; X86-NEXT: xorl (%eax), %edx
+; X86-NEXT: movb 4(%ecx), %cl
+; X86-NEXT: xorb 4(%eax), %cl
+; X86-NEXT: movzbl %cl, %eax
+; X86-NEXT: orl %edx, %eax
+; X86-NEXT: setne %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length5_eq:
+; X64: # %bb.0:
+; X64-NEXT: movl (%rdi), %eax
+; X64-NEXT: xorl (%rsi), %eax
+; X64-NEXT: movb 4(%rdi), %cl
+; X64-NEXT: xorb 4(%rsi), %cl
+; X64-NEXT: movzbl %cl, %ecx
+; X64-NEXT: orl %eax, %ecx
+; X64-NEXT: setne %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 5) nounwind
+ %c = icmp ne i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length5_lt(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length5_lt:
+; X86: # %bb.0: # %loadbb
+; X86-NEXT: pushl %esi
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl (%eax), %edx
+; X86-NEXT: movl (%ecx), %esi
+; X86-NEXT: bswapl %edx
+; X86-NEXT: bswapl %esi
+; X86-NEXT: cmpl %esi, %edx
+; X86-NEXT: jne .LBB18_1
+; X86-NEXT: # %bb.2: # %loadbb1
+; X86-NEXT: movzbl 4(%eax), %eax
+; X86-NEXT: movzbl 4(%ecx), %ecx
+; X86-NEXT: subl %ecx, %eax
+; X86-NEXT: jmp .LBB18_3
+; X86-NEXT: .LBB18_1: # %res_block
+; X86-NEXT: setae %al
+; X86-NEXT: movzbl %al, %eax
+; X86-NEXT: leal -1(%eax,%eax), %eax
+; X86-NEXT: .LBB18_3: # %endblock
+; X86-NEXT: shrl $31, %eax
+; X86-NEXT: # kill: def $al killed $al killed $eax
+; X86-NEXT: popl %esi
+; X86-NEXT: retl
+;
+; X64-LABEL: length5_lt:
+; X64: # %bb.0: # %loadbb
+; X64-NEXT: movl (%rdi), %eax
+; X64-NEXT: movl (%rsi), %ecx
+; X64-NEXT: bswapl %eax
+; X64-NEXT: bswapl %ecx
+; X64-NEXT: cmpl %ecx, %eax
+; X64-NEXT: jne .LBB18_1
+; X64-NEXT: # %bb.2: # %loadbb1
+; X64-NEXT: movzbl 4(%rdi), %eax
+; X64-NEXT: movzbl 4(%rsi), %ecx
+; X64-NEXT: subl %ecx, %eax
+; X64-NEXT: shrl $31, %eax
+; X64-NEXT: # kill: def $al killed $al killed $eax
+; X64-NEXT: retq
+; X64-NEXT: .LBB18_1: # %res_block
+; X64-NEXT: setae %al
+; X64-NEXT: movzbl %al, %eax
+; X64-NEXT: leal -1(%rax,%rax), %eax
+; X64-NEXT: shrl $31, %eax
+; X64-NEXT: # kill: def $al killed $al killed $eax
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 5) nounwind
+ %c = icmp slt i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length7_eq(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length7_eq:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movl (%ecx), %edx
+; X86-NEXT: movl 3(%ecx), %ecx
+; X86-NEXT: xorl (%eax), %edx
+; X86-NEXT: xorl 3(%eax), %ecx
+; X86-NEXT: orl %edx, %ecx
+; X86-NEXT: setne %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length7_eq:
+; X64: # %bb.0:
+; X64-NEXT: movl (%rdi), %eax
+; X64-NEXT: movl 3(%rdi), %ecx
+; X64-NEXT: xorl (%rsi), %eax
+; X64-NEXT: xorl 3(%rsi), %ecx
+; X64-NEXT: orl %eax, %ecx
+; X64-NEXT: setne %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 7) nounwind
+ %c = icmp ne i32 %m, 0
+ ret i1 %c
+}
+
+define i32 @length8(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length8:
+; X86: # %bb.0:
+; X86-NEXT: pushl %esi
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl {{[0-9]+}}(%esp), %esi
+; X86-NEXT: movl (%esi), %ecx
+; X86-NEXT: movl (%eax), %edx
+; X86-NEXT: bswapl %ecx
+; X86-NEXT: bswapl %edx
+; X86-NEXT: cmpl %edx, %ecx
+; X86-NEXT: jne .LBB20_2
+; X86-NEXT: # %bb.1: # %loadbb1
+; X86-NEXT: movl 4(%esi), %ecx
+; X86-NEXT: movl 4(%eax), %edx
+; X86-NEXT: bswapl %ecx
+; X86-NEXT: bswapl %edx
+; X86-NEXT: xorl %eax, %eax
+; X86-NEXT: cmpl %edx, %ecx
+; X86-NEXT: je .LBB20_3
+; X86-NEXT: .LBB20_2: # %res_block
+; X86-NEXT: xorl %eax, %eax
+; X86-NEXT: cmpl %edx, %ecx
+; X86-NEXT: setae %al
+; X86-NEXT: leal -1(%eax,%eax), %eax
+; X86-NEXT: .LBB20_3: # %endblock
+; X86-NEXT: popl %esi
+; X86-NEXT: retl
+;
+; X64-LABEL: length8:
+; X64: # %bb.0:
+; X64-NEXT: movq (%rdi), %rcx
+; X64-NEXT: movq (%rsi), %rdx
+; X64-NEXT: bswapq %rcx
+; X64-NEXT: bswapq %rdx
+; X64-NEXT: xorl %eax, %eax
+; X64-NEXT: cmpq %rdx, %rcx
+; X64-NEXT: seta %al
+; X64-NEXT: sbbl $0, %eax
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 8) nounwind
+ ret i32 %m
+}
+
+define i1 @length8_eq(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length8_eq:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT: movl (%ecx), %edx
+; X86-NEXT: movl 4(%ecx), %ecx
+; X86-NEXT: xorl (%eax), %edx
+; X86-NEXT: xorl 4(%eax), %ecx
+; X86-NEXT: orl %edx, %ecx
+; X86-NEXT: sete %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length8_eq:
+; X64: # %bb.0:
+; X64-NEXT: movq (%rdi), %rax
+; X64-NEXT: cmpq (%rsi), %rax
+; X64-NEXT: sete %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 8) nounwind
+ %c = icmp eq i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length8_eq_const(i8* %X) nounwind {
+; X86-LABEL: length8_eq_const:
+; X86: # %bb.0:
+; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT: movl $858927408, %ecx # imm = 0x33323130
+; X86-NEXT: xorl (%eax), %ecx
+; X86-NEXT: movl $926299444, %edx # imm = 0x37363534
+; X86-NEXT: xorl 4(%eax), %edx
+; X86-NEXT: orl %ecx, %edx
+; X86-NEXT: setne %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length8_eq_const:
+; X64: # %bb.0:
+; X64-NEXT: movabsq $3978425819141910832, %rax # imm = 0x3736353433323130
+; X64-NEXT: cmpq %rax, (%rdi)
+; X64-NEXT: setne %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([65 x i8], [65 x i8]* @.str, i32 0, i32 0), i64 8) nounwind
+ %c = icmp ne i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length9_eq(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length9_eq:
+; X86: # %bb.0:
+; X86-NEXT: pushl $0
+; X86-NEXT: pushl $9
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: testl %eax, %eax
+; X86-NEXT: sete %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length9_eq:
+; X64: # %bb.0:
+; X64-NEXT: movq (%rdi), %rax
+; X64-NEXT: xorq (%rsi), %rax
+; X64-NEXT: movb 8(%rdi), %cl
+; X64-NEXT: xorb 8(%rsi), %cl
+; X64-NEXT: movzbl %cl, %ecx
+; X64-NEXT: orq %rax, %rcx
+; X64-NEXT: sete %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 9) nounwind
+ %c = icmp eq i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length10_eq(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length10_eq:
+; X86: # %bb.0:
+; X86-NEXT: pushl $0
+; X86-NEXT: pushl $10
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: testl %eax, %eax
+; X86-NEXT: sete %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length10_eq:
+; X64: # %bb.0:
+; X64-NEXT: movq (%rdi), %rax
+; X64-NEXT: xorq (%rsi), %rax
+; X64-NEXT: movzwl 8(%rdi), %ecx
+; X64-NEXT: xorw 8(%rsi), %cx
+; X64-NEXT: movzwl %cx, %ecx
+; X64-NEXT: orq %rax, %rcx
+; X64-NEXT: sete %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 10) nounwind
+ %c = icmp eq i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length11_eq(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length11_eq:
+; X86: # %bb.0:
+; X86-NEXT: pushl $0
+; X86-NEXT: pushl $11
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: testl %eax, %eax
+; X86-NEXT: sete %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length11_eq:
+; X64: # %bb.0:
+; X64-NEXT: movq (%rdi), %rax
+; X64-NEXT: movq 3(%rdi), %rcx
+; X64-NEXT: xorq (%rsi), %rax
+; X64-NEXT: xorq 3(%rsi), %rcx
+; X64-NEXT: orq %rax, %rcx
+; X64-NEXT: sete %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 11) nounwind
+ %c = icmp eq i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length12_eq(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length12_eq:
+; X86: # %bb.0:
+; X86-NEXT: pushl $0
+; X86-NEXT: pushl $12
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: testl %eax, %eax
+; X86-NEXT: setne %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length12_eq:
+; X64: # %bb.0:
+; X64-NEXT: movq (%rdi), %rax
+; X64-NEXT: xorq (%rsi), %rax
+; X64-NEXT: movl 8(%rdi), %ecx
+; X64-NEXT: xorl 8(%rsi), %ecx
+; X64-NEXT: orq %rax, %rcx
+; X64-NEXT: setne %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 12) nounwind
+ %c = icmp ne i32 %m, 0
+ ret i1 %c
+}
+
+define i32 @length12(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length12:
+; X86: # %bb.0:
+; X86-NEXT: pushl $0
+; X86-NEXT: pushl $12
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: retl
+;
+; X64-LABEL: length12:
+; X64: # %bb.0:
+; X64-NEXT: movq (%rdi), %rcx
+; X64-NEXT: movq (%rsi), %rdx
+; X64-NEXT: bswapq %rcx
+; X64-NEXT: bswapq %rdx
+; X64-NEXT: cmpq %rdx, %rcx
+; X64-NEXT: jne .LBB27_2
+; X64-NEXT: # %bb.1: # %loadbb1
+; X64-NEXT: movl 8(%rdi), %ecx
+; X64-NEXT: movl 8(%rsi), %edx
+; X64-NEXT: bswapl %ecx
+; X64-NEXT: bswapl %edx
+; X64-NEXT: xorl %eax, %eax
+; X64-NEXT: cmpq %rdx, %rcx
+; X64-NEXT: je .LBB27_3
+; X64-NEXT: .LBB27_2: # %res_block
+; X64-NEXT: xorl %eax, %eax
+; X64-NEXT: cmpq %rdx, %rcx
+; X64-NEXT: setae %al
+; X64-NEXT: leal -1(%rax,%rax), %eax
+; X64-NEXT: .LBB27_3: # %endblock
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 12) nounwind
+ ret i32 %m
+}
+
+define i1 @length13_eq(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length13_eq:
+; X86: # %bb.0:
+; X86-NEXT: pushl $0
+; X86-NEXT: pushl $13
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: testl %eax, %eax
+; X86-NEXT: sete %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length13_eq:
+; X64: # %bb.0:
+; X64-NEXT: movq (%rdi), %rax
+; X64-NEXT: movq 5(%rdi), %rcx
+; X64-NEXT: xorq (%rsi), %rax
+; X64-NEXT: xorq 5(%rsi), %rcx
+; X64-NEXT: orq %rax, %rcx
+; X64-NEXT: sete %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 13) nounwind
+ %c = icmp eq i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length14_eq(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length14_eq:
+; X86: # %bb.0:
+; X86-NEXT: pushl $0
+; X86-NEXT: pushl $14
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: testl %eax, %eax
+; X86-NEXT: sete %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length14_eq:
+; X64: # %bb.0:
+; X64-NEXT: movq (%rdi), %rax
+; X64-NEXT: movq 6(%rdi), %rcx
+; X64-NEXT: xorq (%rsi), %rax
+; X64-NEXT: xorq 6(%rsi), %rcx
+; X64-NEXT: orq %rax, %rcx
+; X64-NEXT: sete %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 14) nounwind
+ %c = icmp eq i32 %m, 0
+ ret i1 %c
+}
+
+define i1 @length15_eq(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length15_eq:
+; X86: # %bb.0:
+; X86-NEXT: pushl $0
+; X86-NEXT: pushl $15
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: testl %eax, %eax
+; X86-NEXT: sete %al
+; X86-NEXT: retl
+;
+; X64-LABEL: length15_eq:
+; X64: # %bb.0:
+; X64-NEXT: movq (%rdi), %rax
+; X64-NEXT: movq 7(%rdi), %rcx
+; X64-NEXT: xorq (%rsi), %rax
+; X64-NEXT: xorq 7(%rsi), %rcx
+; X64-NEXT: orq %rax, %rcx
+; X64-NEXT: sete %al
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 15) nounwind
+ %c = icmp eq i32 %m, 0
+ ret i1 %c
+}
+
+; PR33329 - https://bugs.llvm.org/show_bug.cgi?id=33329
+
+define i32 @length16(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length16:
+; X86: # %bb.0:
+; X86-NEXT: pushl $0
+; X86-NEXT: pushl $16
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: retl
+;
+; X64-LABEL: length16:
+; X64: # %bb.0:
+; X64-NEXT: movq (%rdi), %rcx
+; X64-NEXT: movq (%rsi), %rdx
+; X64-NEXT: bswapq %rcx
+; X64-NEXT: bswapq %rdx
+; X64-NEXT: cmpq %rdx, %rcx
+; X64-NEXT: jne .LBB31_2
+; X64-NEXT: # %bb.1: # %loadbb1
+; X64-NEXT: movq 8(%rdi), %rcx
+; X64-NEXT: movq 8(%rsi), %rdx
+; X64-NEXT: bswapq %rcx
+; X64-NEXT: bswapq %rdx
+; X64-NEXT: xorl %eax, %eax
+; X64-NEXT: cmpq %rdx, %rcx
+; X64-NEXT: je .LBB31_3
+; X64-NEXT: .LBB31_2: # %res_block
+; X64-NEXT: xorl %eax, %eax
+; X64-NEXT: cmpq %rdx, %rcx
+; X64-NEXT: setae %al
+; X64-NEXT: leal -1(%rax,%rax), %eax
+; X64-NEXT: .LBB31_3: # %endblock
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 16) nounwind
+ ret i32 %m
+}
+
+define i1 @length16_eq(i8* %x, i8* %y) nounwind {
+; X86-NOSSE-LABEL: length16_eq:
+; X86-NOSSE: # %bb.0:
+; X86-NOSSE-NEXT: pushl $0
+; X86-NOSSE-NEXT: pushl $16
+; X86-NOSSE-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NOSSE-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NOSSE-NEXT: calll memcmp
+; X86-NOSSE-NEXT: addl $16, %esp
+; X86-NOSSE-NEXT: testl %eax, %eax
+; X86-NOSSE-NEXT: setne %al
+; X86-NOSSE-NEXT: retl
+;
+; X86-SSE1-LABEL: length16_eq:
+; X86-SSE1: # %bb.0:
+; X86-SSE1-NEXT: pushl $0
+; X86-SSE1-NEXT: pushl $16
+; X86-SSE1-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-SSE1-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-SSE1-NEXT: calll memcmp
+; X86-SSE1-NEXT: addl $16, %esp
+; X86-SSE1-NEXT: testl %eax, %eax
+; X86-SSE1-NEXT: setne %al
+; X86-SSE1-NEXT: retl
+;
+; X86-SSE2-LABEL: length16_eq:
+; X86-SSE2: # %bb.0:
+; X86-SSE2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-SSE2-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-SSE2-NEXT: movdqu (%ecx), %xmm0
+; X86-SSE2-NEXT: movdqu (%eax), %xmm1
+; X86-SSE2-NEXT: pcmpeqb %xmm0, %xmm1
+; X86-SSE2-NEXT: pmovmskb %xmm1, %eax
+; X86-SSE2-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X86-SSE2-NEXT: setne %al
+; X86-SSE2-NEXT: retl
+;
+; X64-SSE2-LABEL: length16_eq:
+; X64-SSE2: # %bb.0:
+; X64-SSE2-NEXT: movdqu (%rdi), %xmm0
+; X64-SSE2-NEXT: movdqu (%rsi), %xmm1
+; X64-SSE2-NEXT: pcmpeqb %xmm0, %xmm1
+; X64-SSE2-NEXT: pmovmskb %xmm1, %eax
+; X64-SSE2-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X64-SSE2-NEXT: setne %al
+; X64-SSE2-NEXT: retq
+;
+; X64-AVX-LABEL: length16_eq:
+; X64-AVX: # %bb.0:
+; X64-AVX-NEXT: vmovdqu (%rdi), %xmm0
+; X64-AVX-NEXT: vpcmpeqb (%rsi), %xmm0, %xmm0
+; X64-AVX-NEXT: vpmovmskb %xmm0, %eax
+; X64-AVX-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X64-AVX-NEXT: setne %al
+; X64-AVX-NEXT: retq
+ %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 16) nounwind
+ %cmp = icmp ne i32 %call, 0
+ ret i1 %cmp
+}
+
+define i1 @length16_eq_const(i8* %X) nounwind {
+; X86-NOSSE-LABEL: length16_eq_const:
+; X86-NOSSE: # %bb.0:
+; X86-NOSSE-NEXT: pushl $0
+; X86-NOSSE-NEXT: pushl $16
+; X86-NOSSE-NEXT: pushl $.L.str
+; X86-NOSSE-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NOSSE-NEXT: calll memcmp
+; X86-NOSSE-NEXT: addl $16, %esp
+; X86-NOSSE-NEXT: testl %eax, %eax
+; X86-NOSSE-NEXT: sete %al
+; X86-NOSSE-NEXT: retl
+;
+; X86-SSE1-LABEL: length16_eq_const:
+; X86-SSE1: # %bb.0:
+; X86-SSE1-NEXT: pushl $0
+; X86-SSE1-NEXT: pushl $16
+; X86-SSE1-NEXT: pushl $.L.str
+; X86-SSE1-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-SSE1-NEXT: calll memcmp
+; X86-SSE1-NEXT: addl $16, %esp
+; X86-SSE1-NEXT: testl %eax, %eax
+; X86-SSE1-NEXT: sete %al
+; X86-SSE1-NEXT: retl
+;
+; X86-SSE2-LABEL: length16_eq_const:
+; X86-SSE2: # %bb.0:
+; X86-SSE2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-SSE2-NEXT: movdqu (%eax), %xmm0
+; X86-SSE2-NEXT: pcmpeqb {{\.LCPI.*}}, %xmm0
+; X86-SSE2-NEXT: pmovmskb %xmm0, %eax
+; X86-SSE2-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X86-SSE2-NEXT: sete %al
+; X86-SSE2-NEXT: retl
+;
+; X64-SSE2-LABEL: length16_eq_const:
+; X64-SSE2: # %bb.0:
+; X64-SSE2-NEXT: movdqu (%rdi), %xmm0
+; X64-SSE2-NEXT: pcmpeqb {{.*}}(%rip), %xmm0
+; X64-SSE2-NEXT: pmovmskb %xmm0, %eax
+; X64-SSE2-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X64-SSE2-NEXT: sete %al
+; X64-SSE2-NEXT: retq
+;
+; X64-AVX-LABEL: length16_eq_const:
+; X64-AVX: # %bb.0:
+; X64-AVX-NEXT: vmovdqu (%rdi), %xmm0
+; X64-AVX-NEXT: vpcmpeqb {{.*}}(%rip), %xmm0, %xmm0
+; X64-AVX-NEXT: vpmovmskb %xmm0, %eax
+; X64-AVX-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X64-AVX-NEXT: sete %al
+; X64-AVX-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([65 x i8], [65 x i8]* @.str, i32 0, i32 0), i64 16) nounwind
+ %c = icmp eq i32 %m, 0
+ ret i1 %c
+}
+
+; PR33914 - https://bugs.llvm.org/show_bug.cgi?id=33914
+
+define i32 @length24(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length24:
+; X86: # %bb.0:
+; X86-NEXT: pushl $0
+; X86-NEXT: pushl $24
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: retl
+;
+; X64-LABEL: length24:
+; X64: # %bb.0:
+; X64-NEXT: movl $24, %edx
+; X64-NEXT: jmp memcmp # TAILCALL
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 24) nounwind
+ ret i32 %m
+}
+
+define i1 @length24_eq(i8* %x, i8* %y) nounwind {
+; X86-NOSSE-LABEL: length24_eq:
+; X86-NOSSE: # %bb.0:
+; X86-NOSSE-NEXT: pushl $0
+; X86-NOSSE-NEXT: pushl $24
+; X86-NOSSE-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NOSSE-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NOSSE-NEXT: calll memcmp
+; X86-NOSSE-NEXT: addl $16, %esp
+; X86-NOSSE-NEXT: testl %eax, %eax
+; X86-NOSSE-NEXT: sete %al
+; X86-NOSSE-NEXT: retl
+;
+; X86-SSE1-LABEL: length24_eq:
+; X86-SSE1: # %bb.0:
+; X86-SSE1-NEXT: pushl $0
+; X86-SSE1-NEXT: pushl $24
+; X86-SSE1-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-SSE1-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-SSE1-NEXT: calll memcmp
+; X86-SSE1-NEXT: addl $16, %esp
+; X86-SSE1-NEXT: testl %eax, %eax
+; X86-SSE1-NEXT: sete %al
+; X86-SSE1-NEXT: retl
+;
+; X86-SSE2-LABEL: length24_eq:
+; X86-SSE2: # %bb.0:
+; X86-SSE2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-SSE2-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-SSE2-NEXT: movdqu (%ecx), %xmm0
+; X86-SSE2-NEXT: movdqu 8(%ecx), %xmm1
+; X86-SSE2-NEXT: movdqu (%eax), %xmm2
+; X86-SSE2-NEXT: pcmpeqb %xmm0, %xmm2
+; X86-SSE2-NEXT: movdqu 8(%eax), %xmm0
+; X86-SSE2-NEXT: pcmpeqb %xmm1, %xmm0
+; X86-SSE2-NEXT: pand %xmm2, %xmm0
+; X86-SSE2-NEXT: pmovmskb %xmm0, %eax
+; X86-SSE2-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X86-SSE2-NEXT: sete %al
+; X86-SSE2-NEXT: retl
+;
+; X64-SSE2-LABEL: length24_eq:
+; X64-SSE2: # %bb.0:
+; X64-SSE2-NEXT: movdqu (%rdi), %xmm0
+; X64-SSE2-NEXT: movdqu (%rsi), %xmm1
+; X64-SSE2-NEXT: pcmpeqb %xmm0, %xmm1
+; X64-SSE2-NEXT: movq {{.*#+}} xmm0 = mem[0],zero
+; X64-SSE2-NEXT: movq {{.*#+}} xmm2 = mem[0],zero
+; X64-SSE2-NEXT: pcmpeqb %xmm0, %xmm2
+; X64-SSE2-NEXT: pand %xmm1, %xmm2
+; X64-SSE2-NEXT: pmovmskb %xmm2, %eax
+; X64-SSE2-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X64-SSE2-NEXT: sete %al
+; X64-SSE2-NEXT: retq
+;
+; X64-AVX-LABEL: length24_eq:
+; X64-AVX: # %bb.0:
+; X64-AVX-NEXT: vmovdqu (%rdi), %xmm0
+; X64-AVX-NEXT: vmovq {{.*#+}} xmm1 = mem[0],zero
+; X64-AVX-NEXT: vmovq {{.*#+}} xmm2 = mem[0],zero
+; X64-AVX-NEXT: vpcmpeqb %xmm2, %xmm1, %xmm1
+; X64-AVX-NEXT: vpcmpeqb (%rsi), %xmm0, %xmm0
+; X64-AVX-NEXT: vpand %xmm1, %xmm0, %xmm0
+; X64-AVX-NEXT: vpmovmskb %xmm0, %eax
+; X64-AVX-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X64-AVX-NEXT: sete %al
+; X64-AVX-NEXT: retq
+ %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 24) nounwind
+ %cmp = icmp eq i32 %call, 0
+ ret i1 %cmp
+}
+
+define i1 @length24_eq_const(i8* %X) nounwind {
+; X86-NOSSE-LABEL: length24_eq_const:
+; X86-NOSSE: # %bb.0:
+; X86-NOSSE-NEXT: pushl $0
+; X86-NOSSE-NEXT: pushl $24
+; X86-NOSSE-NEXT: pushl $.L.str
+; X86-NOSSE-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NOSSE-NEXT: calll memcmp
+; X86-NOSSE-NEXT: addl $16, %esp
+; X86-NOSSE-NEXT: testl %eax, %eax
+; X86-NOSSE-NEXT: setne %al
+; X86-NOSSE-NEXT: retl
+;
+; X86-SSE1-LABEL: length24_eq_const:
+; X86-SSE1: # %bb.0:
+; X86-SSE1-NEXT: pushl $0
+; X86-SSE1-NEXT: pushl $24
+; X86-SSE1-NEXT: pushl $.L.str
+; X86-SSE1-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-SSE1-NEXT: calll memcmp
+; X86-SSE1-NEXT: addl $16, %esp
+; X86-SSE1-NEXT: testl %eax, %eax
+; X86-SSE1-NEXT: setne %al
+; X86-SSE1-NEXT: retl
+;
+; X86-SSE2-LABEL: length24_eq_const:
+; X86-SSE2: # %bb.0:
+; X86-SSE2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-SSE2-NEXT: movdqu (%eax), %xmm0
+; X86-SSE2-NEXT: movdqu 8(%eax), %xmm1
+; X86-SSE2-NEXT: pcmpeqb {{\.LCPI.*}}, %xmm1
+; X86-SSE2-NEXT: pcmpeqb {{\.LCPI.*}}, %xmm0
+; X86-SSE2-NEXT: pand %xmm1, %xmm0
+; X86-SSE2-NEXT: pmovmskb %xmm0, %eax
+; X86-SSE2-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X86-SSE2-NEXT: setne %al
+; X86-SSE2-NEXT: retl
+;
+; X64-SSE2-LABEL: length24_eq_const:
+; X64-SSE2: # %bb.0:
+; X64-SSE2-NEXT: movdqu (%rdi), %xmm0
+; X64-SSE2-NEXT: movq {{.*#+}} xmm1 = mem[0],zero
+; X64-SSE2-NEXT: pcmpeqb {{.*}}(%rip), %xmm1
+; X64-SSE2-NEXT: pcmpeqb {{.*}}(%rip), %xmm0
+; X64-SSE2-NEXT: pand %xmm1, %xmm0
+; X64-SSE2-NEXT: pmovmskb %xmm0, %eax
+; X64-SSE2-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X64-SSE2-NEXT: setne %al
+; X64-SSE2-NEXT: retq
+;
+; X64-AVX-LABEL: length24_eq_const:
+; X64-AVX: # %bb.0:
+; X64-AVX-NEXT: vmovdqu (%rdi), %xmm0
+; X64-AVX-NEXT: vmovq {{.*#+}} xmm1 = mem[0],zero
+; X64-AVX-NEXT: vpcmpeqb {{.*}}(%rip), %xmm1, %xmm1
+; X64-AVX-NEXT: vpcmpeqb {{.*}}(%rip), %xmm0, %xmm0
+; X64-AVX-NEXT: vpand %xmm1, %xmm0, %xmm0
+; X64-AVX-NEXT: vpmovmskb %xmm0, %eax
+; X64-AVX-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X64-AVX-NEXT: setne %al
+; X64-AVX-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([65 x i8], [65 x i8]* @.str, i32 0, i32 0), i64 24) nounwind
+ %c = icmp ne i32 %m, 0
+ ret i1 %c
+}
+
+define i32 @length32(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length32:
+; X86: # %bb.0:
+; X86-NEXT: pushl $0
+; X86-NEXT: pushl $32
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: retl
+;
+; X64-LABEL: length32:
+; X64: # %bb.0:
+; X64-NEXT: movl $32, %edx
+; X64-NEXT: jmp memcmp # TAILCALL
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 32) nounwind
+ ret i32 %m
+}
+
+; PR33325 - https://bugs.llvm.org/show_bug.cgi?id=33325
+
+define i1 @length32_eq(i8* %x, i8* %y) nounwind {
+; X86-NOSSE-LABEL: length32_eq:
+; X86-NOSSE: # %bb.0:
+; X86-NOSSE-NEXT: pushl $0
+; X86-NOSSE-NEXT: pushl $32
+; X86-NOSSE-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NOSSE-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NOSSE-NEXT: calll memcmp
+; X86-NOSSE-NEXT: addl $16, %esp
+; X86-NOSSE-NEXT: testl %eax, %eax
+; X86-NOSSE-NEXT: sete %al
+; X86-NOSSE-NEXT: retl
+;
+; X86-SSE1-LABEL: length32_eq:
+; X86-SSE1: # %bb.0:
+; X86-SSE1-NEXT: pushl $0
+; X86-SSE1-NEXT: pushl $32
+; X86-SSE1-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-SSE1-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-SSE1-NEXT: calll memcmp
+; X86-SSE1-NEXT: addl $16, %esp
+; X86-SSE1-NEXT: testl %eax, %eax
+; X86-SSE1-NEXT: sete %al
+; X86-SSE1-NEXT: retl
+;
+; X86-SSE2-LABEL: length32_eq:
+; X86-SSE2: # %bb.0:
+; X86-SSE2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-SSE2-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-SSE2-NEXT: movdqu (%ecx), %xmm0
+; X86-SSE2-NEXT: movdqu 16(%ecx), %xmm1
+; X86-SSE2-NEXT: movdqu (%eax), %xmm2
+; X86-SSE2-NEXT: pcmpeqb %xmm0, %xmm2
+; X86-SSE2-NEXT: movdqu 16(%eax), %xmm0
+; X86-SSE2-NEXT: pcmpeqb %xmm1, %xmm0
+; X86-SSE2-NEXT: pand %xmm2, %xmm0
+; X86-SSE2-NEXT: pmovmskb %xmm0, %eax
+; X86-SSE2-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X86-SSE2-NEXT: sete %al
+; X86-SSE2-NEXT: retl
+;
+; X64-SSE2-LABEL: length32_eq:
+; X64-SSE2: # %bb.0:
+; X64-SSE2-NEXT: movdqu (%rdi), %xmm0
+; X64-SSE2-NEXT: movdqu 16(%rdi), %xmm1
+; X64-SSE2-NEXT: movdqu (%rsi), %xmm2
+; X64-SSE2-NEXT: pcmpeqb %xmm0, %xmm2
+; X64-SSE2-NEXT: movdqu 16(%rsi), %xmm0
+; X64-SSE2-NEXT: pcmpeqb %xmm1, %xmm0
+; X64-SSE2-NEXT: pand %xmm2, %xmm0
+; X64-SSE2-NEXT: pmovmskb %xmm0, %eax
+; X64-SSE2-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X64-SSE2-NEXT: sete %al
+; X64-SSE2-NEXT: retq
+;
+; X64-AVX1-LABEL: length32_eq:
+; X64-AVX1: # %bb.0:
+; X64-AVX1-NEXT: vmovdqu (%rdi), %xmm0
+; X64-AVX1-NEXT: vmovdqu 16(%rdi), %xmm1
+; X64-AVX1-NEXT: vpcmpeqb 16(%rsi), %xmm1, %xmm1
+; X64-AVX1-NEXT: vpcmpeqb (%rsi), %xmm0, %xmm0
+; X64-AVX1-NEXT: vpand %xmm1, %xmm0, %xmm0
+; X64-AVX1-NEXT: vpmovmskb %xmm0, %eax
+; X64-AVX1-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X64-AVX1-NEXT: sete %al
+; X64-AVX1-NEXT: retq
+;
+; X64-AVX2-LABEL: length32_eq:
+; X64-AVX2: # %bb.0:
+; X64-AVX2-NEXT: vmovdqu (%rdi), %ymm0
+; X64-AVX2-NEXT: vpcmpeqb (%rsi), %ymm0, %ymm0
+; X64-AVX2-NEXT: vpmovmskb %ymm0, %eax
+; X64-AVX2-NEXT: cmpl $-1, %eax
+; X64-AVX2-NEXT: sete %al
+; X64-AVX2-NEXT: vzeroupper
+; X64-AVX2-NEXT: retq
+ %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 32) nounwind
+ %cmp = icmp eq i32 %call, 0
+ ret i1 %cmp
+}
+
+define i1 @length32_eq_prefer128(i8* %x, i8* %y) nounwind "prefer-vector-width"="128" {
+; X86-NOSSE-LABEL: length32_eq_prefer128:
+; X86-NOSSE: # %bb.0:
+; X86-NOSSE-NEXT: pushl $0
+; X86-NOSSE-NEXT: pushl $32
+; X86-NOSSE-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NOSSE-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NOSSE-NEXT: calll memcmp
+; X86-NOSSE-NEXT: addl $16, %esp
+; X86-NOSSE-NEXT: testl %eax, %eax
+; X86-NOSSE-NEXT: sete %al
+; X86-NOSSE-NEXT: retl
+;
+; X86-SSE1-LABEL: length32_eq_prefer128:
+; X86-SSE1: # %bb.0:
+; X86-SSE1-NEXT: pushl $0
+; X86-SSE1-NEXT: pushl $32
+; X86-SSE1-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-SSE1-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-SSE1-NEXT: calll memcmp
+; X86-SSE1-NEXT: addl $16, %esp
+; X86-SSE1-NEXT: testl %eax, %eax
+; X86-SSE1-NEXT: sete %al
+; X86-SSE1-NEXT: retl
+;
+; X86-SSE2-LABEL: length32_eq_prefer128:
+; X86-SSE2: # %bb.0:
+; X86-SSE2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-SSE2-NEXT: movl {{[0-9]+}}(%esp), %ecx
+; X86-SSE2-NEXT: movdqu (%ecx), %xmm0
+; X86-SSE2-NEXT: movdqu 16(%ecx), %xmm1
+; X86-SSE2-NEXT: movdqu (%eax), %xmm2
+; X86-SSE2-NEXT: pcmpeqb %xmm0, %xmm2
+; X86-SSE2-NEXT: movdqu 16(%eax), %xmm0
+; X86-SSE2-NEXT: pcmpeqb %xmm1, %xmm0
+; X86-SSE2-NEXT: pand %xmm2, %xmm0
+; X86-SSE2-NEXT: pmovmskb %xmm0, %eax
+; X86-SSE2-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X86-SSE2-NEXT: sete %al
+; X86-SSE2-NEXT: retl
+;
+; X64-SSE2-LABEL: length32_eq_prefer128:
+; X64-SSE2: # %bb.0:
+; X64-SSE2-NEXT: movdqu (%rdi), %xmm0
+; X64-SSE2-NEXT: movdqu 16(%rdi), %xmm1
+; X64-SSE2-NEXT: movdqu (%rsi), %xmm2
+; X64-SSE2-NEXT: pcmpeqb %xmm0, %xmm2
+; X64-SSE2-NEXT: movdqu 16(%rsi), %xmm0
+; X64-SSE2-NEXT: pcmpeqb %xmm1, %xmm0
+; X64-SSE2-NEXT: pand %xmm2, %xmm0
+; X64-SSE2-NEXT: pmovmskb %xmm0, %eax
+; X64-SSE2-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X64-SSE2-NEXT: sete %al
+; X64-SSE2-NEXT: retq
+;
+; X64-AVX-LABEL: length32_eq_prefer128:
+; X64-AVX: # %bb.0:
+; X64-AVX-NEXT: vmovdqu (%rdi), %xmm0
+; X64-AVX-NEXT: vmovdqu 16(%rdi), %xmm1
+; X64-AVX-NEXT: vpcmpeqb 16(%rsi), %xmm1, %xmm1
+; X64-AVX-NEXT: vpcmpeqb (%rsi), %xmm0, %xmm0
+; X64-AVX-NEXT: vpand %xmm1, %xmm0, %xmm0
+; X64-AVX-NEXT: vpmovmskb %xmm0, %eax
+; X64-AVX-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X64-AVX-NEXT: sete %al
+; X64-AVX-NEXT: retq
+ %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 32) nounwind
+ %cmp = icmp eq i32 %call, 0
+ ret i1 %cmp
+}
+
+define i1 @length32_eq_const(i8* %X) nounwind {
+; X86-NOSSE-LABEL: length32_eq_const:
+; X86-NOSSE: # %bb.0:
+; X86-NOSSE-NEXT: pushl $0
+; X86-NOSSE-NEXT: pushl $32
+; X86-NOSSE-NEXT: pushl $.L.str
+; X86-NOSSE-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NOSSE-NEXT: calll memcmp
+; X86-NOSSE-NEXT: addl $16, %esp
+; X86-NOSSE-NEXT: testl %eax, %eax
+; X86-NOSSE-NEXT: setne %al
+; X86-NOSSE-NEXT: retl
+;
+; X86-SSE1-LABEL: length32_eq_const:
+; X86-SSE1: # %bb.0:
+; X86-SSE1-NEXT: pushl $0
+; X86-SSE1-NEXT: pushl $32
+; X86-SSE1-NEXT: pushl $.L.str
+; X86-SSE1-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-SSE1-NEXT: calll memcmp
+; X86-SSE1-NEXT: addl $16, %esp
+; X86-SSE1-NEXT: testl %eax, %eax
+; X86-SSE1-NEXT: setne %al
+; X86-SSE1-NEXT: retl
+;
+; X86-SSE2-LABEL: length32_eq_const:
+; X86-SSE2: # %bb.0:
+; X86-SSE2-NEXT: movl {{[0-9]+}}(%esp), %eax
+; X86-SSE2-NEXT: movdqu (%eax), %xmm0
+; X86-SSE2-NEXT: movdqu 16(%eax), %xmm1
+; X86-SSE2-NEXT: pcmpeqb {{\.LCPI.*}}, %xmm1
+; X86-SSE2-NEXT: pcmpeqb {{\.LCPI.*}}, %xmm0
+; X86-SSE2-NEXT: pand %xmm1, %xmm0
+; X86-SSE2-NEXT: pmovmskb %xmm0, %eax
+; X86-SSE2-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X86-SSE2-NEXT: setne %al
+; X86-SSE2-NEXT: retl
+;
+; X64-SSE2-LABEL: length32_eq_const:
+; X64-SSE2: # %bb.0:
+; X64-SSE2-NEXT: movdqu (%rdi), %xmm0
+; X64-SSE2-NEXT: movdqu 16(%rdi), %xmm1
+; X64-SSE2-NEXT: pcmpeqb {{.*}}(%rip), %xmm1
+; X64-SSE2-NEXT: pcmpeqb {{.*}}(%rip), %xmm0
+; X64-SSE2-NEXT: pand %xmm1, %xmm0
+; X64-SSE2-NEXT: pmovmskb %xmm0, %eax
+; X64-SSE2-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X64-SSE2-NEXT: setne %al
+; X64-SSE2-NEXT: retq
+;
+; X64-AVX1-LABEL: length32_eq_const:
+; X64-AVX1: # %bb.0:
+; X64-AVX1-NEXT: vmovdqu (%rdi), %xmm0
+; X64-AVX1-NEXT: vmovdqu 16(%rdi), %xmm1
+; X64-AVX1-NEXT: vpcmpeqb {{.*}}(%rip), %xmm1, %xmm1
+; X64-AVX1-NEXT: vpcmpeqb {{.*}}(%rip), %xmm0, %xmm0
+; X64-AVX1-NEXT: vpand %xmm1, %xmm0, %xmm0
+; X64-AVX1-NEXT: vpmovmskb %xmm0, %eax
+; X64-AVX1-NEXT: cmpl $65535, %eax # imm = 0xFFFF
+; X64-AVX1-NEXT: setne %al
+; X64-AVX1-NEXT: retq
+;
+; X64-AVX2-LABEL: length32_eq_const:
+; X64-AVX2: # %bb.0:
+; X64-AVX2-NEXT: vmovdqu (%rdi), %ymm0
+; X64-AVX2-NEXT: vpcmpeqb {{.*}}(%rip), %ymm0, %ymm0
+; X64-AVX2-NEXT: vpmovmskb %ymm0, %eax
+; X64-AVX2-NEXT: cmpl $-1, %eax
+; X64-AVX2-NEXT: setne %al
+; X64-AVX2-NEXT: vzeroupper
+; X64-AVX2-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([65 x i8], [65 x i8]* @.str, i32 0, i32 0), i64 32) nounwind
+ %c = icmp ne i32 %m, 0
+ ret i1 %c
+}
+
+define i32 @length64(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: length64:
+; X86: # %bb.0:
+; X86-NEXT: pushl $0
+; X86-NEXT: pushl $64
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: retl
+;
+; X64-LABEL: length64:
+; X64: # %bb.0:
+; X64-NEXT: movl $64, %edx
+; X64-NEXT: jmp memcmp # TAILCALL
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 64) nounwind
+ ret i32 %m
+}
+
+define i1 @length64_eq(i8* %x, i8* %y) nounwind {
+; X86-LABEL: length64_eq:
+; X86: # %bb.0:
+; X86-NEXT: pushl $0
+; X86-NEXT: pushl $64
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: testl %eax, %eax
+; X86-NEXT: setne %al
+; X86-NEXT: retl
+;
+; X64-SSE2-LABEL: length64_eq:
+; X64-SSE2: # %bb.0:
+; X64-SSE2-NEXT: pushq %rax
+; X64-SSE2-NEXT: movl $64, %edx
+; X64-SSE2-NEXT: callq memcmp
+; X64-SSE2-NEXT: testl %eax, %eax
+; X64-SSE2-NEXT: setne %al
+; X64-SSE2-NEXT: popq %rcx
+; X64-SSE2-NEXT: retq
+;
+; X64-AVX1-LABEL: length64_eq:
+; X64-AVX1: # %bb.0:
+; X64-AVX1-NEXT: pushq %rax
+; X64-AVX1-NEXT: movl $64, %edx
+; X64-AVX1-NEXT: callq memcmp
+; X64-AVX1-NEXT: testl %eax, %eax
+; X64-AVX1-NEXT: setne %al
+; X64-AVX1-NEXT: popq %rcx
+; X64-AVX1-NEXT: retq
+;
+; X64-AVX2-LABEL: length64_eq:
+; X64-AVX2: # %bb.0:
+; X64-AVX2-NEXT: vmovdqu (%rdi), %ymm0
+; X64-AVX2-NEXT: vmovdqu 32(%rdi), %ymm1
+; X64-AVX2-NEXT: vpcmpeqb 32(%rsi), %ymm1, %ymm1
+; X64-AVX2-NEXT: vpcmpeqb (%rsi), %ymm0, %ymm0
+; X64-AVX2-NEXT: vpand %ymm1, %ymm0, %ymm0
+; X64-AVX2-NEXT: vpmovmskb %ymm0, %eax
+; X64-AVX2-NEXT: cmpl $-1, %eax
+; X64-AVX2-NEXT: setne %al
+; X64-AVX2-NEXT: vzeroupper
+; X64-AVX2-NEXT: retq
+ %call = tail call i32 @memcmp(i8* %x, i8* %y, i64 64) nounwind
+ %cmp = icmp ne i32 %call, 0
+ ret i1 %cmp
+}
+
+define i1 @length64_eq_const(i8* %X) nounwind {
+; X86-LABEL: length64_eq_const:
+; X86: # %bb.0:
+; X86-NEXT: pushl $0
+; X86-NEXT: pushl $64
+; X86-NEXT: pushl $.L.str
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: testl %eax, %eax
+; X86-NEXT: sete %al
+; X86-NEXT: retl
+;
+; X64-SSE2-LABEL: length64_eq_const:
+; X64-SSE2: # %bb.0:
+; X64-SSE2-NEXT: pushq %rax
+; X64-SSE2-NEXT: movl $.L.str, %esi
+; X64-SSE2-NEXT: movl $64, %edx
+; X64-SSE2-NEXT: callq memcmp
+; X64-SSE2-NEXT: testl %eax, %eax
+; X64-SSE2-NEXT: sete %al
+; X64-SSE2-NEXT: popq %rcx
+; X64-SSE2-NEXT: retq
+;
+; X64-AVX1-LABEL: length64_eq_const:
+; X64-AVX1: # %bb.0:
+; X64-AVX1-NEXT: pushq %rax
+; X64-AVX1-NEXT: movl $.L.str, %esi
+; X64-AVX1-NEXT: movl $64, %edx
+; X64-AVX1-NEXT: callq memcmp
+; X64-AVX1-NEXT: testl %eax, %eax
+; X64-AVX1-NEXT: sete %al
+; X64-AVX1-NEXT: popq %rcx
+; X64-AVX1-NEXT: retq
+;
+; X64-AVX2-LABEL: length64_eq_const:
+; X64-AVX2: # %bb.0:
+; X64-AVX2-NEXT: vmovdqu (%rdi), %ymm0
+; X64-AVX2-NEXT: vmovdqu 32(%rdi), %ymm1
+; X64-AVX2-NEXT: vpcmpeqb {{.*}}(%rip), %ymm1, %ymm1
+; X64-AVX2-NEXT: vpcmpeqb {{.*}}(%rip), %ymm0, %ymm0
+; X64-AVX2-NEXT: vpand %ymm1, %ymm0, %ymm0
+; X64-AVX2-NEXT: vpmovmskb %ymm0, %eax
+; X64-AVX2-NEXT: cmpl $-1, %eax
+; X64-AVX2-NEXT: sete %al
+; X64-AVX2-NEXT: vzeroupper
+; X64-AVX2-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* getelementptr inbounds ([65 x i8], [65 x i8]* @.str, i32 0, i32 0), i64 64) nounwind
+ %c = icmp eq i32 %m, 0
+ ret i1 %c
+}
+
+; This checks that we do not do stupid things with huge sizes.
+define i32 @huge_length(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: huge_length:
+; X86: # %bb.0:
+; X86-NEXT: pushl $2147483647 # imm = 0x7FFFFFFF
+; X86-NEXT: pushl $-1
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: retl
+;
+; X64-LABEL: huge_length:
+; X64: # %bb.0:
+; X64-NEXT: movabsq $9223372036854775807, %rdx # imm = 0x7FFFFFFFFFFFFFFF
+; X64-NEXT: jmp memcmp # TAILCALL
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 9223372036854775807) nounwind
+ ret i32 %m
+}
+
+define i1 @huge_length_eq(i8* %X, i8* %Y) nounwind {
+; X86-LABEL: huge_length_eq:
+; X86: # %bb.0:
+; X86-NEXT: pushl $2147483647 # imm = 0x7FFFFFFF
+; X86-NEXT: pushl $-1
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: testl %eax, %eax
+; X86-NEXT: sete %al
+; X86-NEXT: retl
+;
+; X64-LABEL: huge_length_eq:
+; X64: # %bb.0:
+; X64-NEXT: pushq %rax
+; X64-NEXT: movabsq $9223372036854775807, %rdx # imm = 0x7FFFFFFFFFFFFFFF
+; X64-NEXT: callq memcmp
+; X64-NEXT: testl %eax, %eax
+; X64-NEXT: sete %al
+; X64-NEXT: popq %rcx
+; X64-NEXT: retq
+
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 9223372036854775807) nounwind
+ %c = icmp eq i32 %m, 0
+ ret i1 %c
+}
+
+; This checks non-constant sizes.
+define i32 @nonconst_length(i8* %X, i8* %Y, i64 %size) nounwind {
+; X86-LABEL: nonconst_length:
+; X86: # %bb.0:
+; X86-NEXT: jmp memcmp # TAILCALL
+;
+; X64-LABEL: nonconst_length:
+; X64: # %bb.0:
+; X64-NEXT: jmp memcmp # TAILCALL
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 %size) nounwind
+ ret i32 %m
+}
+
+define i1 @nonconst_length_eq(i8* %X, i8* %Y, i64 %size) nounwind {
+; X86-LABEL: nonconst_length_eq:
+; X86: # %bb.0:
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: pushl {{[0-9]+}}(%esp)
+; X86-NEXT: calll memcmp
+; X86-NEXT: addl $16, %esp
+; X86-NEXT: testl %eax, %eax
+; X86-NEXT: sete %al
+; X86-NEXT: retl
+;
+; X64-LABEL: nonconst_length_eq:
+; X64: # %bb.0:
+; X64-NEXT: pushq %rax
+; X64-NEXT: callq memcmp
+; X64-NEXT: testl %eax, %eax
+; X64-NEXT: sete %al
+; X64-NEXT: popq %rcx
+; X64-NEXT: retq
+ %m = tail call i32 @memcmp(i8* %X, i8* %Y, i64 %size) nounwind
+ %c = icmp eq i32 %m, 0
+ ret i1 %c
+}
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