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llvm-mirror/test/Transforms/InstCombine/readnone-maythrow.ll
Sanjoy Das 1728d455cf [InstCombine] Don't DSE across readnone functions that may throw
Summary: Depends on D28740

Reviewers: dberlin, chandlerc, hfinkel, majnemer

Subscribers: mcrosier, llvm-commits

Differential Revision: https://reviews.llvm.org/D28742

llvm-svn: 292197
2017-01-17 05:45:09 +00:00

35 lines
736 B
LLVM

; RUN: opt -S -instcombine < %s | FileCheck %s
declare void @readnone_but_may_throw() readnone
define void @f_0(i32* %ptr) {
; CHECK-LABEL: @f_0(
entry:
; CHECK: store i32 10, i32* %ptr
; CHECK-NEXT: call void @readnone_but_may_throw()
; CHECK-NEXT: store i32 20, i32* %ptr, align 4
; CHECK: ret void
store i32 10, i32* %ptr
call void @readnone_but_may_throw()
store i32 20, i32* %ptr
ret void
}
define void @f_1(i1 %cond, i32* %ptr) {
; CHECK-LABEL: @f_1(
; CHECK: store i32 10, i32* %ptr
; CHECK-NEXT: call void @readnone_but_may_throw()
store i32 10, i32* %ptr
call void @readnone_but_may_throw()
br i1 %cond, label %left, label %merge
left:
store i32 20, i32* %ptr
br label %merge
merge:
ret void
}