48 lines
1.6 KiB
LLVM
48 lines
1.6 KiB
LLVM
; RUN: opt < %s -mergereturn -loop-extract -enable-new-pm=0 -S | FileCheck %s
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; This test used to enter an infinite loop, until out of memory (PR3082).
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define void @test() {
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; CHECK-LABEL: define void @test()
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label %codeRepl
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; CHECK: codeRepl:
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; CHECK-NEXT: %targetBlock = call i1 @test.loopentry()
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; CHECK-NEXT: br i1 %targetBlock, label %exit.1, label %exit.0
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; CHECK: exit.0:
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; CHECK-NEXT: br label %UnifiedReturnBlock
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; CHECK: exit.1:
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; CHECK-NEXT: br label %UnifiedReturnBlock
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; CHECK: UnifiedReturnBlock:
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; CHECK-NEXT: ret void
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entry:
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br label %loopentry
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loopentry: ; preds = %loopexit, %entry
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br i1 undef, label %exit.1, label %loopexit
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loopexit: ; preds = %loopentry
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br i1 undef, label %loopentry, label %exit.0
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exit.0: ; preds = %loopexit
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ret void
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exit.1: ; preds = %loopentry
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ret void
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}
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; CHECK-LABEL: define internal i1 @test.loopentry()
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; CHECK-NEXT: newFuncRoot:
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; CHECK-NEXT: br label %loopentry
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; CHECK: loopentry:
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; CHECK-NEXT: br i1 true, label %exit.1.exitStub, label %loopexit
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; CHECK: loopexit:
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; CHECK-NEXT: br i1 false, label %loopexit.loopentry_crit_edge, label %exit.0.exitStub
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; CHECK: loopexit.loopentry_crit_edge:
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; CHECK-NEXT: br label %loopentry
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; CHECK: exit.1.exitStub:
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; CHECK-NEXT: ret i1 true
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; CHECK: exit.0.exitStub:
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; CHECK-NEXT: ret i1 false
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