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Add skipFunction to PostRA machine sinking pass.

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Summary: Add skipFunction to PostRA machine sinking pass.

Reviewers: junbuml

Subscribers: arsenm, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D57847

llvm-svn: 354541
This commit is contained in:
Xin Tong 2019-02-21 02:11:06 +00:00
parent 69c3d0de2b
commit 6cd77adb87
2 changed files with 43 additions and 0 deletions
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3
lib/CodeGen/MachineSink.cpp
View File

@ -1202,6 +1202,9 @@ bool PostRAMachineSinking::tryToSinkCopy(MachineBasicBlock &CurBB,
}
bool PostRAMachineSinking::runOnMachineFunction(MachineFunction &MF) {
if (skipFunction(MF.getFunction()))
return false;
bool Changed = false;
const TargetRegisterInfo *TRI = MF.getSubtarget().getRegisterInfo();
const TargetInstrInfo *TII = MF.getSubtarget().getInstrInfo();

40
test/CodeGen/AArch64/bisect-post-ra-machine-sink.mir Normal file
View File

@ -0,0 +1,40 @@
# RUN: llc -mtriple=aarch64-none-linux-gnu -run-pass=postra-machine-sink -verify-machineinstrs -o - %s | FileCheck -check-prefix=RUN-POSTRA %s
# RUN: llc -mtriple=aarch64-none-linux-gnu -run-pass=postra-machine-sink -opt-bisect-limit=0 -verify-machineinstrs -o - %s | FileCheck -check-prefix=BISECT-NO-RUN-POSTRA %s
---
# Make sure the pass is run.
# Sink w19 to %bb.1.
# RUN-POSTRA-LABEL: name: sinkcopy1
# RUN-POSTRA: bb.0:
# RUN-POSTRA-NOT: $w19 = COPY killed $w0
# RUN-POSTRA: bb.1:
# RUN-POSTRA: liveins: $w1, $w0
# RUN-POSTRA: renamable $w19 = COPY killed $w0
# Make sure the pass it not run.
# BISECT-NO-RUN-POSTRA-LABEL: name: sinkcopy1
# BISECT-NO-RUN-POSTRA: bb.0:
# BISECT-NO-RUN-POSTRA: $w19 = COPY killed $w0
# BISECT-NO-RUN-POSTRA: bb.1:
# BISECT-NO-RUN-POSTRA: liveins: $w1, $w19
name: sinkcopy1
tracksRegLiveness: true
body: |
bb.0:
liveins: $w0, $w1
$w1 = SUBSWri $w1, 1, 0, implicit-def $nzcv
renamable $w19 = COPY killed $w0
Bcc 11, %bb.1, implicit $nzcv
B %bb.2
bb.1:
liveins: $w1, $w19
$w0 = ADDWrr $w1, $w19
RET $x0
bb.2:
$w0 = COPY $wzr
RET $x0
...