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| author | Dehao Chen <dehao@google.com> | 2017-02-18 03:46:51 +0000 |
|---|---|---|
| committer | Dehao Chen <dehao@google.com> | 2017-02-18 03:46:51 +0000 |
| commit | 7d230325efbd6bdbddd55750357597789fdfd154 (patch) | |
| tree | 267ea5d84ae55c91da04c58aee19659d7505d4ce /llvm/test/Transforms/LoopVectorize | |
| parent | 982bf827b57a727ceeec9bd34c25ccb2b0133a9d (diff) | |
| download | bcm5719-llvm-7d230325efbd6bdbddd55750357597789fdfd154.tar.gz bcm5719-llvm-7d230325efbd6bdbddd55750357597789fdfd154.zip | |
Increases full-unroll threshold.
Summary:
The default threshold for fully unroll is too conservative. This patch doubles the full-unroll threshold
This change will affect the following speccpu2006 benchmarks (performance numbers were collected from Intel Sandybridge):
Performance:
403 0.11%
433 0.51%
445 0.48%
447 3.50%
453 1.49%
464 0.75%
Code size:
403 0.56%
433 0.96%
445 2.16%
447 2.96%
453 0.94%
464 8.02%
The compiler time overhead is similar with code size.
Reviewers: davidxl, mkuper, mzolotukhin, hfinkel, chandlerc
Reviewed By: hfinkel, chandlerc
Subscribers: mehdi_amini, zzheng, efriedma, haicheng, hfinkel, llvm-commits
Differential Revision: https://reviews.llvm.org/D28368
llvm-svn: 295538
Diffstat (limited to 'llvm/test/Transforms/LoopVectorize')
| -rw-r--r-- | llvm/test/Transforms/LoopVectorize/X86/metadata-enable.ll | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/llvm/test/Transforms/LoopVectorize/X86/metadata-enable.ll b/llvm/test/Transforms/LoopVectorize/X86/metadata-enable.ll index 74c0c16086f..e1793bcc321 100644 --- a/llvm/test/Transforms/LoopVectorize/X86/metadata-enable.ll +++ b/llvm/test/Transforms/LoopVectorize/X86/metadata-enable.ll @@ -1,13 +1,14 @@ ; RUN: opt < %s -mcpu=corei7 -O1 -S -unroll-allow-partial=0 | FileCheck %s --check-prefix=O1 ; RUN: opt < %s -mcpu=corei7 -O2 -S -unroll-allow-partial=0 | FileCheck %s --check-prefix=O2 -; RUN: opt < %s -mcpu=corei7 -O3 -S -unroll-allow-partial=0 | FileCheck %s --check-prefix=O3 +; RUN: opt < %s -mcpu=corei7 -O3 -S -unroll-threshold=150 -unroll-allow-partial=0 | FileCheck %s --check-prefix=O3 +; RUN: opt < %s -mcpu=corei7 -O3 -S -unroll-allow-partial=0 | FileCheck %s --check-prefix=O3DEFAULT ; RUN: opt < %s -mcpu=corei7 -Os -S -unroll-allow-partial=0 | FileCheck %s --check-prefix=Os ; RUN: opt < %s -mcpu=corei7 -Oz -S -unroll-allow-partial=0 | FileCheck %s --check-prefix=Oz ; RUN: opt < %s -mcpu=corei7 -O1 -vectorize-loops -S -unroll-allow-partial=0 | FileCheck %s --check-prefix=O1VEC ; RUN: opt < %s -mcpu=corei7 -Oz -vectorize-loops -S -unroll-allow-partial=0 | FileCheck %s --check-prefix=OzVEC ; RUN: opt < %s -mcpu=corei7 -O1 -loop-vectorize -S -unroll-allow-partial=0 | FileCheck %s --check-prefix=O1VEC2 ; RUN: opt < %s -mcpu=corei7 -Oz -loop-vectorize -S -unroll-allow-partial=0 | FileCheck %s --check-prefix=OzVEC2 -; RUN: opt < %s -mcpu=corei7 -O3 -disable-loop-vectorization -S -unroll-allow-partial=0 | FileCheck %s --check-prefix=O3DIS +; RUN: opt < %s -mcpu=corei7 -O3 -unroll-threshold=150 -disable-loop-vectorization -S -unroll-allow-partial=0 | FileCheck %s --check-prefix=O3DIS ; This file tests the llvm.loop.vectorize.enable metadata forcing ; vectorization even when optimization levels are too low, or when @@ -25,6 +26,9 @@ target triple = "x86_64-unknown-linux-gnu" ; O3-LABEL: @enabled( ; O3: store <4 x i32> ; O3: ret i32 +; O3DEFAULT-LABEL: @enabled( +; O3DEFAULT: store <4 x i32> +; O3DEFAULT: ret i32 ; Pragma always wins! ; O3DIS-LABEL: @enabled( ; O3DIS: store <4 x i32> @@ -77,6 +81,9 @@ for.end: ; preds = %for.body ; O3-LABEL: @nopragma( ; O3: store <4 x i32> ; O3: ret i32 +; O3DEFAULT-LABEL: @nopragma( +; O3DEFAULT: store <4 x i32> +; O3DEFAULT: ret i32 ; O3DIS-LABEL: @nopragma( ; O3DIS-NOT: store <4 x i32> ; O3DIS: ret i32 @@ -128,6 +135,9 @@ for.end: ; preds = %for.body ; O3-LABEL: @disabled( ; O3-NOT: store <4 x i32> ; O3: ret i32 +; O3DEFAULT-LABEL: @disabled( +; O3DEFAULT: store <4 x i32> +; O3DEFAULT: ret i32 ; O3DIS-LABEL: @disabled( ; O3DIS-NOT: store <4 x i32> ; O3DIS: ret i32 |
