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cc714e2142
The personality routine currently lives in the LandingPadInst. This isn't desirable because: - All LandingPadInsts in the same function must have the same personality routine. This means that each LandingPadInst beyond the first has an operand which produces no additional information. - There is ongoing work to introduce EH IR constructs other than LandingPadInst. Moving the personality routine off of any one particular Instruction and onto the parent function seems a lot better than have N different places a personality function can sneak onto an exceptional function. Differential Revision: http://reviews.llvm.org/D10429 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239940 91177308-0d34-0410-b5e6-96231b3b80d8
32 lines
1.1 KiB
LLVM
32 lines
1.1 KiB
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: opt < %s -instcombine -disable-output
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declare i8* @test()
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define i32 @foo() personality i32 (...)* @__gxx_personality_v0 {
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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, i32* %P2 ; <i32> [#uses=1]
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ret i32 %V
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N: ; preds = %call
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%exn = landingpad {i8*, i32}
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cleanup
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ret i32 0
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}
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declare i32 @__gxx_personality_v0(...)
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