Comment # 13
on bug 90056
from Andy Furniss
(In reply to Tom Stellard from comment #12) > (In reply to Andy Furniss from comment #10) > > (In reply to Grigori Goronzy from comment #9) > > > Created attachment 115409 [details] [review] [review] [review] [review] > > > Full shader > > > > > > That does not help either. Seems to break the SSA somehow. Full shader that > > > triggers the bug attached. > > > > > > The patch I posted earlier help with the the reduced testcase, but not with > > > the full shader. Both undef incoming values in phi nodes and undef branch > > > conditions cause problems in different ways. > > > > With the second patch + valley I get - > > > > valley_x64: LiveVariables.cpp:114: void > > llvm::LiveVariables::MarkVirtRegAliveInBlock(llvm::LiveVariables::VarInfo &, > > llvm::MachineBasicBlock *, llvm::MachineBasicBlock *, > > std::vector<MachineBasicBlock *> &): Assertion `MBB != &MF->front() && > > "Can't find reaching def for virtreg"' failed. > > Did test with only the patch from comment #8 or did you test with both > patches? Just #8 but I just tried with both and get the same fail.
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