[PATCH] D110170: [InstCombine] fold cast of right-shift if high bits are not demanded

Tue Sep 21 21:03:34 PDT 2021

nemanjai added a comment.

This is causing timeouts on a number of multistage builds. I have seen it at least on PPC, SystemZ and AArch64:
PPC: https://lab.llvm.org/buildbot/#/builders/121/builds/11680
PPC: https://lab.llvm.org/buildbot/#/builders/36/builds/12596
SystemZ: https://lab.llvm.org/buildbot/#/builders/8/builds/1821
AArch64: https://lab.llvm.org/buildbot/#/builders/179/builds/1073

The timeout happens when the stage 1 compiler is building `lib/Transforms/Coroutines/CoroFrame.cpp`
I'll see if I can track down what is causing the infinite loop/recursion.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D110170/new/

https://reviews.llvm.org/D110170