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| author | Artem Serov <artem.serov@linaro.org> | 2018-05-16 19:06:32 +0100 |
|---|---|---|
| committer | Artem Serov <artem.serov@linaro.org> | 2018-07-04 13:12:18 +0100 |
| commit | 18ba1dacaaf426cbeb3c0aff6db9c58a752f9a96 (patch) | |
| tree | e6d82d3b8856137a1b09a2843ea88165d97afbfe /compiler/optimizing/loop_analysis.h | |
| parent | 0e32908d0ee4be5905cdd409dd3c45331fc98465 (diff) | |
ART: Implement loop full unrolling.
Performs whole loop unrolling for small loops with small
trip count to eliminate the loop check overhead, to have
more opportunities for inter-iteration optimizations.
caffeinemark/FloatAtom: 1.2x performance on arm64 Cortex-A57.
Test: 530-checker-peel-unroll.
Test: test-art-host, test-art-target.
Change-Id: Idf3fe3cb611376935d176c60db8c49907222e28a
Diffstat (limited to 'compiler/optimizing/loop_analysis.h')
| -rw-r--r-- | compiler/optimizing/loop_analysis.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/compiler/optimizing/loop_analysis.h b/compiler/optimizing/loop_analysis.h index bcb7b70494..57509ee410 100644 --- a/compiler/optimizing/loop_analysis.h +++ b/compiler/optimizing/loop_analysis.h @@ -160,6 +160,13 @@ class ArchNoOptsLoopHelper : public ArenaObject<kArenaAllocOptimization> { // Returns 'false' by default, should be overridden by particular target loop helper. virtual bool IsLoopPeelingEnabled() const { return false; } + // Returns whether it is beneficial to fully unroll the loop. + // + // Returns 'false' by default, should be overridden by particular target loop helper. + virtual bool IsFullUnrollingBeneficial(LoopAnalysisInfo* analysis_info ATTRIBUTE_UNUSED) const { + return false; + } + // Returns optimal SIMD unrolling factor for the loop. // // Returns kNoUnrollingFactor by default, should be overridden by particular target loop helper. |