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27 lines
763 B
LLVM
27 lines
763 B
LLVM
; This testcase tests for a problem where LICM hoists
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; potentially trapping instructions when they are not guaranteed to execute.
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;
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; RUN: llvm-as < %s | opt -licm | llvm-dis | %prcontext "IfUnEqual" 2 | grep div
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@X = global i32 0 ; <i32*> [#uses=1]
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declare void @foo()
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define i32 @test(i1 %c) {
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%A = load i32* @X ; <i32> [#uses=2]
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br label %Loop
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Loop: ; preds = %LoopTail, %0
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call void @foo( )
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br i1 %c, label %LoopTail, label %IfUnEqual
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IfUnEqual: ; preds = %Loop
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%B1 = sdiv i32 4, %A ; <i32> [#uses=1]
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br label %LoopTail
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LoopTail: ; preds = %IfUnEqual, %Loop
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%B = phi i32 [ 0, %Loop ], [ %B1, %IfUnEqual ] ; <i32> [#uses=1]
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br i1 %c, label %Loop, label %Out
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Out: ; preds = %LoopTail
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%C = sub i32 %A, %B ; <i32> [#uses=1]
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ret i32 %C
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}
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