Comment # 12
on bug 90056
from Tom Stellard
(In reply to Andy Furniss from comment #10) > (In reply to Grigori Goronzy from comment #9) > > Created attachment 115409 [details] [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?
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