[PATCH] D116424: [ShrinkWrap] don't sink Save points past INLINEASM_BR MachineInstrs

[Nick Desaulniers via Phabricator via llvm-commits]

nickdesaulniers planned changes to this revision.
nickdesaulniers added inline comments.


================
Comment at: llvm/lib/CodeGen/ShrinkWrap.cpp:507-511
+      if (MI.getOpcode() == TargetOpcode::INLINEASM_BR) {
+        LLVM_DEBUG(dbgs() << "inlineasm_br prevents shrink-wrapping\n");
+        return false;
+      }
       if (!useOrDefCSROrFI(MI, RS.get()))
----------------
There's something simpler going on here.  The same exact input works as expected for other architectures with link registers, such as `arm` and `aarch64`. It seems that `useOrDefCSROrFI` is returning `true` for the `INLINEASM_BR` for those architectures, but not `powerpc64le`.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D116424/new/

https://reviews.llvm.org/D116424