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98b9ddd887
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
50 lines
1.7 KiB
LLVM
50 lines
1.7 KiB
LLVM
; REQUIRES: asserts
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; RUN: llc %s -debug-pass=Structure -verify-machineinstrs \
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; RUN: --debug-only=machine-outliner -enable-machine-outliner=always \
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; RUN: -mtriple arm64---- -o /dev/null 2>&1 \
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; RUN: | FileCheck %s -check-prefix=ALWAYS
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; RUN: llc %s -debug-pass=Structure -verify-machineinstrs \
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; RUN: --debug-only=machine-outliner -enable-machine-outliner \
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; RUN: -mtriple arm64---- -o /dev/null 2>&1 \
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; RUN: | FileCheck %s -check-prefix=ENABLE
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; RUN: llc %s -debug-pass=Structure -verify-machineinstrs \
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; RUN: -enable-machine-outliner=never -mtriple arm64---- -o /dev/null 2>&1 \
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; RUN: | FileCheck %s -check-prefix=NEVER
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; RUN: llc %s -debug-pass=Structure -verify-machineinstrs \
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; RUN: --debug-only=machine-outliner -mtriple arm64---- -o /dev/null 2>&1 \
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; RUN: | FileCheck %s -check-prefix=NOT-ADDED
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; RUN: llc %s -O=0 -debug-pass=Structure -verify-machineinstrs \
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; RUN: -mtriple arm64---- -o /dev/null 2>&1 \
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; RUN: | FileCheck %s -check-prefix=OPTNONE
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; Make sure that the outliner is added to the pass pipeline only when the
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; appropriate flags/settings are set. Make sure it isn't added otherwise.
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;
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; Cases where it should be added:
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; * -enable-machine-outliner
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; * -enable-machine-outliner=always
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; * -enable-machine-outliner is not passed (AArch64 supports
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; target-default outlining)
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;
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; Cases where it should not be added:
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; * -O0 or equivalent
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; * -enable-machine-outliner=never is passed
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; ALWAYS: Machine Outliner
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; ALWAYS: Machine Outliner: Running on all functions
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; ENABLE: Machine Outliner
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; ENABLE: Machine Outliner: Running on all functions
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; NEVER-NOT: Machine Outliner
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; NOT-ADDED: Machine Outliner
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; NOT-ADDED: Machine Outliner: Running on target-default functions
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; OPTNONE-NOT: Machine Outliner
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define void @foo() {
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ret void;
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}
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