25 lines
909 B
LLVM
25 lines
909 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
|
; RUN: llc < %s -mtriple=x86_64-apple-darwin -O0 | FileCheck %s
|
|
|
|
; Make sure we only use the less significant bit of the value that feeds the
|
|
; select. Otherwise, we may account for a non-zero value whereas the
|
|
; lsb is zero.
|
|
; <rdar://problem/15651765>
|
|
|
|
define i32 @fastisel_select(i1 %exchSub2211_, i1 %trunc_8766) {
|
|
; CHECK-LABEL: fastisel_select:
|
|
; CHECK: ## %bb.0:
|
|
; CHECK-NEXT: movb %sil, %al
|
|
; CHECK-NEXT: movb %dil, %dl
|
|
; CHECK-NEXT: subb %al, %dl
|
|
; CHECK-NEXT: xorl %eax, %eax
|
|
; CHECK-NEXT: movl $1204476887, %ecx ## imm = 0x47CADBD7
|
|
; CHECK-NEXT: testb $1, %dl
|
|
; CHECK-NEXT: cmovnel %ecx, %eax
|
|
; CHECK-NEXT: retq
|
|
%shuffleInternal15257_8932 = sub i1 %exchSub2211_, %trunc_8766
|
|
%counter_diff1345 = select i1 %shuffleInternal15257_8932, i32 1204476887, i32 0
|
|
ret i32 %counter_diff1345
|
|
}
|
|
|