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llvm-project/llvm/test/CodeGen/AArch64/machine-outliner-default.mir

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Recommit "Enable MachineOutliner by default under -Oz for AArch64" Fixed the ASAN failure from before in r338148, so recommiting. This patch enables the MachineOutliner by default in AArch64 under -Oz. The MachineOutliner offers around a 4.5% improvement on the current -Oz code size improvements. We have done work into improving the debuggability of outlined code, so that users of -Oz won't be surprised by the optimization. We have also been executing the LLVM test suite and common external tests such as the SPEC suites continuously with no issue. The outliner has a low compile-time overhead of roughly 1%. At this point, the outliner would be a really good addition to the -Oz pass pipeline! llvm-svn: 338160
2018-07-28 04:18:27 +08:00
# RUN: llc -mtriple=aarch64--- -run-pass=machine-outliner \
# RUN: -verify-machineinstrs %s -o - | FileCheck %s
--- |
define void @outline_1() #0 { ret void }
define void @outline_2() #0 { ret void }
define void @outline_3() #0 { ret void }
define void @dont_outline() #1 { ret void }
attributes #0 = { noredzone minsize optsize }
attributes #1 = { noredzone }
...
---
name: outline_1
tracksRegLiveness: true
body: |
bb.0:
; CHECK-LABEL: bb.0:
; CHECK: OUTLINED
liveins: $w8, $wzr
$w8 = ORRWri $wzr, 1
$w8 = ORRWri $wzr, 2
$w8 = ORRWri $wzr, 3
$w8 = ORRWri $wzr, 4
RET undef $lr
...
---
name: outline_2
tracksRegLiveness: true
body: |
bb.0:
; CHECK-LABEL: bb.0:
; CHECK: OUTLINED
liveins: $w8, $wzr
$w8 = ORRWri $wzr, 1
$w8 = ORRWri $wzr, 2
$w8 = ORRWri $wzr, 3
$w8 = ORRWri $wzr, 4
RET undef $lr
...
---
name: outline_3
tracksRegLiveness: true
body: |
bb.0:
; CHECK-LABEL: bb.0:
; CHECK: OUTLINED
liveins: $w8, $wzr
$w8 = ORRWri $wzr, 1
$w8 = ORRWri $wzr, 2
$w8 = ORRWri $wzr, 3
$w8 = ORRWri $wzr, 4
RET undef $lr
...
---
name: dont_outline
tracksRegLiveness: true
body: |
bb.0:
; CHECK-LABEL: bb.0:
; CHECK-NOT: BL
liveins: $w8, $wzr
$w8 = ORRWri $wzr, 1
$w8 = ORRWri $wzr, 2
$w8 = ORRWri $wzr, 3
$w8 = ORRWri $wzr, 4
RET undef $lr