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new testcase

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10843 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2004-01-14 05:53:11 +00:00
parent c9b0702a89
commit f6e180324e
1 changed files with 24 additions and 0 deletions
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test/Transforms/InstCombine/2004-01-13-InstCombineInvokePHI.ll Normal file
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; Test for a problem afflicting several C++ programs in the testsuite. The
; instcombine pass is trying to get rid of the cast in the invoke instruction,
; inserting a cast of the return value after the PHI instruction, but which is
; used by the PHI instruction. This is bad: because of the semantics of the
; invoke instruction, we really cannot perform this transformation at all at
; least without splitting the critical edge.
;
; RUN: llvm-as < %s | opt -instcombine -disable-output
declare sbyte* %test()
int %foo() {
entry:
br bool true, label %cont, label %call
call:
%P = invoke int*()* cast (sbyte*()* %test to int*()*)()
to label %cont except label %N
cont:
%P2 = phi int* [%P, %call], [null, %entry]
%V = load int* %P2
ret int %V
N:
ret int 0
}