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