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Vedant Kumar
45c9fb9375
With or without PGO data applied, splitting early in the pipeline (either before the inliner or shortly after it) regresses performance across SPEC variants. The cause appears to be that splitting hides context for subsequent optimizations. Schedule splitting late again, in effect reversing r352080, which scheduled the splitting pass early for code size benefits (documented in https://reviews.llvm.org/D57082). Differential Revision: https://reviews.llvm.org/D58258 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354158 91177308-0d34-0410-b5e6-96231b3b80d8
34 lines
2.3 KiB
LLVM
34 lines
2.3 KiB
LLVM
; RUN: opt -debug-pass-manager -passes='default<O2>' -pgo-kind=pgo-instr-gen-pipeline -profile-file='temp' %s 2>&1 |FileCheck %s --check-prefixes=GEN
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; RUN: llvm-profdata merge %S/Inputs/new-pm-pgo.proftext -o %t.profdata
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; RUN: opt -debug-pass-manager -passes='default<O2>' -pgo-kind=pgo-instr-use-pipeline -profile-file='%t.profdata' %s 2>&1 |FileCheck %s --check-prefixes=USE
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; RUN: opt -debug-pass-manager -passes='default<O2>' -hot-cold-split -pgo-kind=pgo-instr-use-pipeline -profile-file='%t.profdata' %s 2>&1 |FileCheck %s --check-prefixes=USE --check-prefixes=SPLIT
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; RUN: opt -debug-pass-manager -passes='default<O2>' -pgo-kind=pgo-sample-use-pipeline -profile-file='%S/Inputs/new-pm-pgo.prof' %s 2>&1 \
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; RUN: |FileCheck %s --check-prefixes=SAMPLE_USE,SAMPLE_USE_O
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; RUN: opt -debug-pass-manager -passes='thinlto-pre-link<O2>' -pgo-kind=pgo-sample-use-pipeline -profile-file='%S/Inputs/new-pm-pgo.prof' %s 2>&1 \
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; RUN: |FileCheck %s --check-prefixes=SAMPLE_USE,SAMPLE_USE_PRE_LINK
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; RUN: opt -debug-pass-manager -passes='thinlto<O2>' -pgo-kind=pgo-sample-use-pipeline -profile-file='%S/Inputs/new-pm-pgo.prof' %s 2>&1 \
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; RUN: |FileCheck %s --check-prefixes=SAMPLE_USE,SAMPLE_USE_POST_LINK
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; RUN: opt -debug-pass-manager -passes='default<O2>' -new-pm-debug-info-for-profiling %s 2>&1 |FileCheck %s --check-prefixes=SAMPLE_GEN
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;
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; GEN: Running pass: PGOInstrumentationGen
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; USE: Running pass: PGOInstrumentationUse
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; USE: Running pass: PGOIndirectCallPromotion
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; USE: Running pass: PGOMemOPSizeOpt
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; SAMPLE_USE_O: Running pass: ModuleToFunctionPassAdaptor<{{.*}}AddDiscriminatorsPass{{.*}}>
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; SAMPLE_USE_PRE_LINK: Running pass: ModuleToFunctionPassAdaptor<{{.*}}AddDiscriminatorsPass{{.*}}>
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; SAMPLE_USE: Running pass: SimplifyCFGPass
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; SAMPLE_USE: Running pass: SROA
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; SAMPLE_USE: Running pass: EarlyCSEPass
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; SAMPLE_USE: Running pass: LowerExpectIntrinsicPass
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; SAMPLE_USE_POST_LINK: Running pass: InstCombinePass
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; SAMPLE_USE: Running pass: SampleProfileLoaderPass
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; SAMPLE_USE_O: Running pass: PGOIndirectCallPromotion
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; SAMPLE_USE_POST_LINK-NOT: Running pass: GlobalOptPass
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; SAMPLE_USE_POST_LINK: Running pass: PGOIndirectCallPromotion
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; SAMPLE_GEN: Running pass: ModuleToFunctionPassAdaptor<{{.*}}AddDiscriminatorsPass{{.*}}>
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; SPLIT: Running pass: HotColdSplittingPass
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define void @foo() {
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ret void
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}
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