[PATCH] D123801: [DAG][PowerPC] Combine shuffle(bitcast(X), Mask) to bitcast(shuffle(X, Mask'))

Sun May 8 23:47:11 PDT 2022

uabelho added a comment.

I've stumbled on the (seemingly) infinite execution with this patch as well. I found it with code generated by llvm-stress.
So

  llc -march=x86-64 -mcpu=corei7 -o /dev/null foo.ll

hangs in

  [2022-05-09 08:43:33.796049513] 0x80f9960     Executing Pass 'X86 DAG->DAG Instruction Selection' on Function 'autogen_SD18620'...

F23010437: foo.ll <https://reviews.llvm.org/F23010437>

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D123801/new/

https://reviews.llvm.org/D123801