1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
| ; 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: ## kill: def $sil killed $sil killed $esi
; CHECK-NEXT: ## kill: def $dil killed $dil killed $edi
; CHECK-NEXT: xorl %eax, %eax
; CHECK-NEXT: subb %sil, %dil
; CHECK-NEXT: testb $1, %dil
; CHECK-NEXT: movl $1204476887, %ecx ## imm = 0x47CADBD7
; 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
}
|