[LLVMdev] PHINode containing itself causes segfault when compiling Blender OpenCL kernel with R600 backend

Tue Sep 23 02:12:09 PDT 2014

Thanks for the explanation... but does it satisfy SSA? It seems that register gets overwritten more than 1 time when using itself as input? Shouldn't SSA unroll such structures into ones that don't reference itself?

And is it the same with LLVM's internal structures (PHINode)? I mean, is PHINode a "register" or just an "expression"? If it's meant to be an expression, then it still looks strange to be recursive, because there's no "previous" value for it to reference...
-- 
With best regards,
  Vitaliy Filippov
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