[PATCH] D156434: [PEI][ARM] Switch to backwards frame index elimination
Jay Foad via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Jul 27 07:15:30 PDT 2023
foad created this revision.
foad added reviewers: t.p.northover, rengolin, greened, olista01, sdesmalen, arsenm, sepavloff, luporl.
Herald added subscribers: StephenFan, arphaman, hiraditya, kristof.beyls, qcolombet.
Herald added a project: All.
foad requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
Herald added a project: LLVM.
This adds better support for call frame pseudos that adjust SP in
PEI::replaceFrameIndicesBackward.
Running frame index elimination backwards is preferred because it can
do backwards register scavenging (on targets that require scavenging)
which does not rely on accurate kill flags.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D156434
Files:
llvm/lib/CodeGen/PrologEpilogInserter.cpp
llvm/lib/Target/ARM/ARMBaseRegisterInfo.h
llvm/test/CodeGen/Thumb/emergency-spill-slot.ll
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