[PATCH] D28583: CodeGen: Allow small copyable blocks to "break" the CFG.

[Kyle Butt via Phabricator via llvm-commits]

iteratee updated this revision to Diff 86340.
iteratee added a comment.

Compare frequencies with a small bias against the tail-duplication side to account for increased icache pressure.

Includes a TODO to handle edge frequencies better in general.


https://reviews.llvm.org/D28583

Files:
  lib/CodeGen/MachineBlockPlacement.cpp
  test/CodeGen/AArch64/arm64-atomic.ll
  test/CodeGen/AArch64/arm64-shrink-wrapping.ll
  test/CodeGen/AArch64/tail-dup-repeat-worklist.ll
  test/CodeGen/AArch64/tbz-tbnz.ll
  test/CodeGen/AMDGPU/branch-relaxation.ll
  test/CodeGen/AMDGPU/uniform-cfg.ll
  test/CodeGen/ARM/arm-and-tst-peephole.ll
  test/CodeGen/ARM/atomic-op.ll
  test/CodeGen/ARM/atomic-ops-v8.ll
  test/CodeGen/ARM/cmpxchg-weak.ll
  test/CodeGen/Mips/brconnez.ll
  test/CodeGen/Mips/micromips-compact-branches.ll
  test/CodeGen/PowerPC/misched-inorder-latency.ll
  test/CodeGen/PowerPC/tail-dup-break-cfg.ll
  test/CodeGen/PowerPC/tail-dup-layout.ll
  test/CodeGen/SPARC/sjlj.ll
  test/CodeGen/SystemZ/int-cmp-44.ll
  test/CodeGen/Thumb/thumb-shrink-wrapping.ll
  test/CodeGen/Thumb2/cbnz.ll
  test/CodeGen/Thumb2/ifcvt-compare.ll
  test/CodeGen/Thumb2/v8_IT_4.ll
  test/CodeGen/WebAssembly/phi.ll
  test/CodeGen/X86/avx512-cmp.ll
  test/CodeGen/X86/bt.ll
  test/CodeGen/X86/fp-une-cmp.ll
  test/CodeGen/X86/jump_sign.ll
  test/CodeGen/X86/testb-je-fusion.ll

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