llvm-project/llvm/test/CodeGen/X86/iabs.ll

21 lines
494 B
LLVM

; RUN: llc < %s -mtriple=x86_64-- | FileCheck %s
;; Integer absolute value, should produce something at least as good as:
;; movl %edi, %eax
;; negl %eax
;; cmovll %edi, %eax
;; ret
; rdar://10695237
define i32 @test(i32 %a) nounwind {
; CHECK-LABEL: test:
; CHECK: mov
; CHECK-NEXT: neg
; CHECK-NEXT: cmov
; CHECK-NEXT: ret
%tmp1neg = sub i32 0, %a
%b = icmp sgt i32 %a, -1
%abs = select i1 %b, i32 %a, i32 %tmp1neg
ret i32 %abs
}