5b158093e2
We never bothered to have a separate set of combines for -O0 in the prelegalizer before. This results in some minor performance hits for a mode where performance isn't a concern (although not regressing code size significantly is still preferable). This also removes the CSE option since we don't need it for -O0. Through experiments, I've arrived at a set of combines that gets the most code size improvement at -O0, while reducing the amount of time spent in the combiner by around 35% give or take. Differential Revision: https://reviews.llvm.org/D102038
89 lines
3.8 KiB
LLVM
89 lines
3.8 KiB
LLVM
; RUN: llc -mtriple=aarch64-- -debug-pass=Structure %s -o /dev/null 2>&1 \
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; RUN: --debugify-and-strip-all-safe=0 \
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; RUN: -verify-machineinstrs=0 -O0 \
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; RUN: | FileCheck %s --check-prefixes=ENABLED,FALLBACK
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; RUN: llc -mtriple=aarch64-- -debug-pass=Structure %s -o /dev/null 2>&1 \
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; RUN: --debugify-and-strip-all-safe=0 \
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; RUN: -verify-machineinstrs -O0 \
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; RUN: | FileCheck %s --check-prefixes=ENABLED,FALLBACK,VERIFY,VERIFY-O0
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; RUN: llc -mtriple=aarch64-- -debug-pass=Structure %s -o /dev/null 2>&1 \
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; RUN: --debugify-and-strip-all-safe=0 \
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; RUN: -verify-machineinstrs=0 -O0 -aarch64-enable-global-isel-at-O=0 -global-isel-abort=1 \
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; RUN: | FileCheck %s --check-prefixes=ENABLED,NOFALLBACK
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; RUN: llc -mtriple=aarch64-- -debug-pass=Structure %s -o /dev/null 2>&1 \
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; RUN: --debugify-and-strip-all-safe=0 \
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; RUN: -verify-machineinstrs=0 -O0 -aarch64-enable-global-isel-at-O=0 -global-isel-abort=2 \
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; RUN: | FileCheck %s --check-prefixes=ENABLED,FALLBACK
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; RUN: llc -mtriple=aarch64-- -debug-pass=Structure %s -o /dev/null 2>&1 \
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; RUN: --debugify-and-strip-all-safe=0 \
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; RUN: -verify-machineinstrs=0 -global-isel \
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; RUN: | FileCheck %s --check-prefix ENABLED --check-prefix NOFALLBACK --check-prefix ENABLED-O1
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; RUN: llc -mtriple=aarch64-- -debug-pass=Structure %s -o /dev/null 2>&1 \
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; RUN: --debugify-and-strip-all-safe=0 \
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; RUN: -verify-machineinstrs=0 -global-isel -global-isel-abort=2 \
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; RUN: | FileCheck %s --check-prefix ENABLED --check-prefix FALLBACK --check-prefix ENABLED-O1
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; RUN: llc -mtriple=aarch64-- -debug-pass=Structure %s -o /dev/null 2>&1 \
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; RUN: --debugify-and-strip-all-safe=0 \
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; RUN: -verify-machineinstrs=0 -O1 -aarch64-enable-global-isel-at-O=3 \
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; RUN: | FileCheck %s --check-prefix ENABLED --check-prefix ENABLED-O1
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; RUN: llc -mtriple=aarch64-- -debug-pass=Structure %s -o /dev/null 2>&1 \
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; RUN: --debugify-and-strip-all-safe=0 \
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; RUN: -verify-machineinstrs=0 -O1 -aarch64-enable-global-isel-at-O=0 \
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; RUN: | FileCheck %s --check-prefix DISABLED
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; RUN: llc -mtriple=aarch64-- -debug-pass=Structure %s -o /dev/null 2>&1 \
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; RUN: --debugify-and-strip-all-safe=0 \
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; RUN: -verify-machineinstrs=0 -aarch64-enable-global-isel-at-O=-1 \
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; RUN: | FileCheck %s --check-prefix DISABLED
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; RUN: llc -mtriple=aarch64-- -debug-pass=Structure %s -o /dev/null 2>&1 \
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; RUN: --debugify-and-strip-all-safe=0 \
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; RUN: -verify-machineinstrs=0 | FileCheck %s --check-prefix DISABLED
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; RUN: llc -mtriple=aarch64-- -fast-isel=0 -global-isel=false \
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; RUN: --debugify-and-strip-all-safe=0 \
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; RUN: -debug-pass=Structure %s -o /dev/null 2>&1 -verify-machineinstrs=0 \
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; RUN: | FileCheck %s --check-prefix DISABLED
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; ENABLED: IRTranslator
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; VERIFY-NEXT: Verify generated machine code
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; ENABLED-NEXT: Analysis for ComputingKnownBits
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; ENABLED-O1-NEXT: MachineDominator Tree Construction
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; ENABLED-O1-NEXT: Analysis containing CSE Info
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; ENABLED-O1-NEXT: PreLegalizerCombiner
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; VERIFY-O0-NEXT: AArch64O0PreLegalizerCombiner
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; VERIFY-NEXT: Verify generated machine code
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; VERIFY-O0-NEXT: Analysis containing CSE Info
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; ENABLED-NEXT: Legalizer
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; VERIFY-NEXT: Verify generated machine code
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; ENABLED: RegBankSelect
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; VERIFY-NEXT: Verify generated machine code
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; ENABLED-NEXT: Localizer
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; VERIFY-O0-NEXT: Verify generated machine code
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; ENABLED-O1-NEXT: Analysis for ComputingKnownBits
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; ENABLED-O1-NEXT: Lazy Branch Probability Analysis
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; ENABLED-O1-NEXT: Lazy Block Frequency Analysis
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; ENABLED-NEXT: InstructionSelect
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; ENABLED-O1-NEXT: AArch64 Post Select Optimizer
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; VERIFY-NEXT: Verify generated machine code
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; ENABLED-NEXT: ResetMachineFunction
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; FALLBACK: AArch64 Instruction Selection
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; NOFALLBACK-NOT: AArch64 Instruction Selection
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; DISABLED-NOT: IRTranslator
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; DISABLED: AArch64 Instruction Selection
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; DISABLED: Finalize ISel and expand pseudo-instructions
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define void @empty() {
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ret void
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}
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