37 lines
1.0 KiB
LLVM
37 lines
1.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
|
|
; RUN: opt -S < %s -passes=newgvn | FileCheck %s
|
|
|
|
declare void @llvm.sideeffect()
|
|
|
|
; Store-to-load forwarding across a @llvm.sideeffect.
|
|
|
|
define float @s2l(ptr %p) {
|
|
; CHECK-LABEL: define float @s2l(
|
|
; CHECK-SAME: ptr [[P:%.*]]) {
|
|
; CHECK-NEXT: store float 0.000000e+00, ptr [[P]], align 4
|
|
; CHECK-NEXT: call void @llvm.sideeffect()
|
|
; CHECK-NEXT: ret float 0.000000e+00
|
|
;
|
|
store float 0.0, ptr %p
|
|
call void @llvm.sideeffect()
|
|
%t = load float, ptr %p
|
|
ret float %t
|
|
}
|
|
|
|
; Redundant load elimination across a @llvm.sideeffect.
|
|
|
|
define float @rle(ptr %p) {
|
|
; CHECK-LABEL: define float @rle(
|
|
; CHECK-SAME: ptr [[P:%.*]]) {
|
|
; CHECK-NEXT: [[R:%.*]] = load float, ptr [[P]], align 4
|
|
; CHECK-NEXT: call void @llvm.sideeffect()
|
|
; CHECK-NEXT: [[T:%.*]] = fadd float [[R]], [[R]]
|
|
; CHECK-NEXT: ret float [[T]]
|
|
;
|
|
%r = load float, ptr %p
|
|
call void @llvm.sideeffect()
|
|
%s = load float, ptr %p
|
|
%t = fadd float %r, %s
|
|
ret float %t
|
|
}
|