[llvm-commits] [llvm] r122581 - /llvm/trunk/lib/CodeGen/MachineVerifier.cpp

[Jakob Stoklund Olesen]

On Dec 27, 2010, at 1:56 PM, Cameron Zwarich wrote:

> On Dec 27, 2010, at 1:30 PM, Jakob Stoklund Olesen wrote:
> 
>>> +          if (VNI->isPHIDef() && VNI->def == LiveInts->getMBBStartIdx(MFI)) {
>> 
>> One thing is still missing: In this case, it is also legal for the live interval not to be live out of the predecessor. That can happen if a PHI operand was <undef>.
> 
> What's an easy test-case for this? I don't think I saw it trigger on any of the existing tests.

It usually shows up when you are using bugpoint. It tends to insert lots of undefs.

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