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Add a test for r280191

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llvm-svn: 281694
This commit is contained in:
David Majnemer 2016-09-16 02:43:36 +00:00
parent 3e305af02b
commit 3c923e4b92
1 changed files with 36 additions and 0 deletions
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test/Transforms/SimplifyCFG/PR30210.ll Normal file
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; RUN: opt -S -simplifycfg < %s | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
declare i32* @fn1(i32* returned)
define i32 @test1(i1 %B) {
entry:
br label %for.cond.us
for.cond.us: ; preds = %for.cond.us, %entry
br i1 %B, label %for.cond4.preheader, label %for.cond.us
for.cond4.preheader: ; preds = %for.cond.us
br i1 %B, label %for.cond4.preheader.split.us, label %for.cond4
for.cond4.preheader.split.us: ; preds = %for.cond4.preheader
unreachable
for.cond4: ; preds = %for.end, %for.cond4.preheader
%phi = phi i32* [ %call, %for.end ], [ undef, %for.cond4.preheader ]
%call = call i32* @fn1(i32* %phi)
br label %for.cond5
for.cond5: ; preds = %for.cond5, %for.cond4
br i1 %B, label %for.cond5, label %for.end
for.end: ; preds = %for.cond5
%load = load i32, i32* %call, align 4
br label %for.cond4
}
; CHECK-LABEL: define i32 @test1(
; CHECK: br label %[[LABEL:.*]]
; CHECK: [[LABEL]]:
; CHECK: br label %[[LABEL]]