[PATCH] D72656: Specify branch probabilities for callbr dests

[Bill Wendling via Phabricator via llvm-commits]

void created this revision.
void added a reviewer: nickdesaulniers.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

callbr's indirect branches aren't expected to be taken, so reduce their
probabilities to 0 while increasing the default destination to 1. This
allows some code improvements through block placement.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D72656

Files:
  llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
  llvm/test/CodeGen/AArch64/callbr-asm-label.ll
  llvm/test/CodeGen/AArch64/callbr-asm-obj-file.ll
  llvm/test/CodeGen/X86/callbr-asm-branch-folding.ll
  llvm/test/CodeGen/X86/callbr-asm.ll

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