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https://github.com/c64scene-ar/llvm-6502.git
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ec9a35a6f9
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47793 91177308-0d34-0410-b5e6-96231b3b80d8
29 lines
1022 B
LLVM
29 lines
1022 B
LLVM
; Test for a problem afflicting several C++ programs in the testsuite. The
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; instcombine pass is trying to get rid of the cast in the invoke instruction,
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; inserting a cast of the return value after the PHI instruction, but which is
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; used by the PHI instruction. This is bad: because of the semantics of the
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; invoke instruction, we really cannot perform this transformation at all at
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; least without splitting the critical edge.
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;
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; RUN: llvm-as < %s | opt -instcombine -disable-output
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declare i8* @test()
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define i32 @foo() {
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entry:
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br i1 true, label %cont, label %call
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call: ; preds = %entry
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%P = invoke i32* bitcast (i8* ()* @test to i32* ()*)( )
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to label %cont unwind label %N ; <i32*> [#uses=1]
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cont: ; preds = %call, %entry
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%P2 = phi i32* [ %P, %call ], [ null, %entry ] ; <i32*> [#uses=1]
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%V = load i32* %P2 ; <i32> [#uses=1]
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ret i32 %V
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N: ; preds = %call
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ret i32 0
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}
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