[all-commits] [llvm/llvm-project] ddf2f9: [EarlyIfConversion] Add target hook to allow for m...

[Hendrik Greving via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ddf2f90a48b638fcd7cd1dbeeffec14390fb47b8
      https://github.com/llvm/llvm-project/commit/ddf2f90a48b638fcd7cd1dbeeffec14390fb47b8
  Author: Hendrik Greving <hgreving at google.com>
  Date:   2022-12-14 (Wed, 14 Dec 2022)

  Changed paths:
    M llvm/include/llvm/CodeGen/TargetInstrInfo.h
    M llvm/lib/CodeGen/EarlyIfConversion.cpp

  Log Message:
  -----------
  [EarlyIfConversion] Add target hook to allow for multiple ifcvt iterations.

Adds a target hook canPredicatePredicatedInstr(const MachineInstr&) that
assumes an instruction is already predicated and returns true if it can
be predicated again, used by the early if-conversion pass in order to
iterate multiple times on architectures supporting predicate logic.

No test added since there is no upstream target that can take advantage.

Differential Revision: https://reviews.llvm.org/D139981