[PATCH] D18226: Codegen: Tail-duplicate during placement.

[Kyle Butt via llvm-commits]

iteratee updated this revision to Diff 67432.
iteratee added a comment.

Use single explicit threshold between tail-dup and tail-merge during layout.
Tail-duplicate indirect branches with a larger threshold during layout (Mirrors pre reg-alloc behavior).


https://reviews.llvm.org/D18226

Files:
  include/llvm/CodeGen/TailDuplicator.h
  lib/CodeGen/BranchFolding.cpp
  lib/CodeGen/BranchFolding.h
  lib/CodeGen/IfConversion.cpp
  lib/CodeGen/MachineBlockPlacement.cpp
  lib/CodeGen/TailDuplication.cpp
  lib/CodeGen/TailDuplicator.cpp
  test/CodeGen/AArch64/arm64-extload-knownzero.ll
  test/CodeGen/AArch64/machine_cse.ll
  test/CodeGen/PowerPC/branch-opt.ll
  test/CodeGen/PowerPC/sjlj.ll
  test/CodeGen/PowerPC/tail-dup-layout.ll
  test/CodeGen/WebAssembly/cfg-stackify.ll
  test/CodeGen/WebAssembly/mem-intrinsics.ll
  test/CodeGen/X86/block-placement.ll
  test/CodeGen/X86/fp-une-cmp.ll
  test/CodeGen/X86/pr11202.ll
  test/CodeGen/X86/ragreedy-bug.ll
  test/CodeGen/X86/update-terminator.mir

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