1 files changed, 144 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/X86/usub_sat_plus.ll b/llvm/test/CodeGen/X86/usub_sat_plus.ll
new file mode 100644
index 00000000000..6a9e5a46642
--- /dev/null
+++ b/llvm/test/CodeGen/X86/usub_sat_plus.ll
@@ -0,0 +1,144 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=i686 -mattr=cmov | FileCheck %s --check-prefixes=CHECK,X86
+; RUN: llc < %s -mtriple=x86_64-linux | FileCheck %s --check-prefixes=CHECK,X64
+
+declare i4 @llvm.usub.sat.i4(i4, i4)
+declare i8 @llvm.usub.sat.i8(i8, i8)
+declare i16 @llvm.usub.sat.i16(i16, i16)
+declare i32 @llvm.usub.sat.i32(i32, i32)
+declare i64 @llvm.usub.sat.i64(i64, i64)
+
+define i32 @func32(i32 %x, i32 %y, i32 %z) nounwind {
+; X86-LABEL: func32:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT:    imull {{[0-9]+}}(%esp), %ecx
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    subl %ecx, %eax
+; X86-NEXT:    cmovbl %edx, %eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: func32:
+; X64:       # %bb.0:
+; X64-NEXT:    imull %edx, %esi
+; X64-NEXT:    xorl %eax, %eax
+; X64-NEXT:    subl %esi, %edi
+; X64-NEXT:    cmovael %edi, %eax
+; X64-NEXT:    retq
+  %a = mul i32 %y, %z
+  %tmp = call i32 @llvm.usub.sat.i32(i32 %x, i32 %a)
+  ret i32 %tmp
+}
+
+define i64 @func64(i64 %x, i64 %y, i64 %z) nounwind {
+; X86-LABEL: func64:
+; X86:       # %bb.0:
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movl {{[0-9]+}}(%esp), %edx
+; X86-NEXT:    xorl %ecx, %ecx
+; X86-NEXT:    subl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    sbbl {{[0-9]+}}(%esp), %edx
+; X86-NEXT:    cmovbl %ecx, %edx
+; X86-NEXT:    cmovbl %ecx, %eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: func64:
+; X64:       # %bb.0:
+; X64-NEXT:    xorl %eax, %eax
+; X64-NEXT:    subq %rdx, %rdi
+; X64-NEXT:    cmovaeq %rdi, %rax
+; X64-NEXT:    retq
+  %a = mul i64 %y, %z
+  %tmp = call i64 @llvm.usub.sat.i64(i64 %x, i64 %z)
+  ret i64 %tmp
+}
+
+define zeroext i16 @func16(i16 zeroext %x, i16 zeroext %y, i16 zeroext %z) nounwind {
+; X86-LABEL: func16:
+; X86:       # %bb.0:
+; X86-NEXT:    movzwl {{[0-9]+}}(%esp), %eax
+; X86-NEXT:    movzwl {{[0-9]+}}(%esp), %ecx
+; X86-NEXT:    imulw {{[0-9]+}}(%esp), %cx
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    subw %cx, %ax
+; X86-NEXT:    cmovbl %edx, %eax
+; X86-NEXT:    # kill: def $ax killed $ax killed $eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: func16:
+; X64:       # %bb.0:
+; X64-NEXT:    imull %edx, %esi
+; X64-NEXT:    xorl %eax, %eax
+; X64-NEXT:    subw %si, %di
+; X64-NEXT:    cmovael %edi, %eax
+; X64-NEXT:    # kill: def $ax killed $ax killed $eax
+; X64-NEXT:    retq
+  %a = mul i16 %y, %z
+  %tmp = call i16 @llvm.usub.sat.i16(i16 %x, i16 %a)
+  ret i16 %tmp
+}
+
+define zeroext i8 @func8(i8 zeroext %x, i8 zeroext %y, i8 zeroext %z) nounwind {
+; X86-LABEL: func8:
+; X86:       # %bb.0:
+; X86-NEXT:    movb {{[0-9]+}}(%esp), %cl
+; X86-NEXT:    movb {{[0-9]+}}(%esp), %al
+; X86-NEXT:    mulb {{[0-9]+}}(%esp)
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    subb %al, %cl
+; X86-NEXT:    movzbl %cl, %eax
+; X86-NEXT:    cmovbl %edx, %eax
+; X86-NEXT:    # kill: def $al killed $al killed $eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: func8:
+; X64:       # %bb.0:
+; X64-NEXT:    movl %esi, %eax
+; X64-NEXT:    # kill: def $al killed $al killed $eax
+; X64-NEXT:    mulb %dl
+; X64-NEXT:    xorl %ecx, %ecx
+; X64-NEXT:    subb %al, %dil
+; X64-NEXT:    movzbl %dil, %eax
+; X64-NEXT:    cmovbl %ecx, %eax
+; X64-NEXT:    # kill: def $al killed $al killed $eax
+; X64-NEXT:    retq
+  %a = mul i8 %y, %z
+  %tmp = call i8 @llvm.usub.sat.i8(i8 %x, i8 %a)
+  ret i8 %tmp
+}
+
+define zeroext i4 @func4(i4 zeroext %x, i4 zeroext %y, i4 zeroext %z) nounwind {
+; X86-LABEL: func4:
+; X86:       # %bb.0:
+; X86-NEXT:    movb {{[0-9]+}}(%esp), %cl
+; X86-NEXT:    movb {{[0-9]+}}(%esp), %al
+; X86-NEXT:    mulb {{[0-9]+}}(%esp)
+; X86-NEXT:    shlb $4, %al
+; X86-NEXT:    shlb $4, %cl
+; X86-NEXT:    xorl %edx, %edx
+; X86-NEXT:    subb %al, %cl
+; X86-NEXT:    movzbl %cl, %eax
+; X86-NEXT:    cmovbl %edx, %eax
+; X86-NEXT:    shrb $4, %al
+; X86-NEXT:    movzbl %al, %eax
+; X86-NEXT:    retl
+;
+; X64-LABEL: func4:
+; X64:       # %bb.0:
+; X64-NEXT:    movl %esi, %eax
+; X64-NEXT:    # kill: def $al killed $al killed $eax
+; X64-NEXT:    mulb %dl
+; X64-NEXT:    shlb $4, %al
+; X64-NEXT:    shlb $4, %dil
+; X64-NEXT:    xorl %ecx, %ecx
+; X64-NEXT:    subb %al, %dil
+; X64-NEXT:    movzbl %dil, %eax
+; X64-NEXT:    cmovbl %ecx, %eax
+; X64-NEXT:    shrb $4, %al
+; X64-NEXT:    movzbl %al, %eax
+; X64-NEXT:    retq
+  %a = mul i4 %y, %z
+  %tmp = call i4 @llvm.usub.sat.i4(i4 %x, i4 %a)
+  ret i4 %tmp
+}