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| author | Adam Nemet <anemet@apple.com> | 2016-03-18 00:27:43 +0000 |
|---|---|---|
| committer | Adam Nemet <anemet@apple.com> | 2016-03-18 00:27:43 +0000 |
| commit | 709e3046ee3c473b373fe5ec61e4d6e467991898 (patch) | |
| tree | 48c80521787e640be1608d9991f919853facfb6f /llvm/test/Transforms/LoopDataPrefetch/AArch64/large-stride.ll | |
| parent | 6d8beeca5302984e845d9c6d7bf0a9e4a5ca98f9 (diff) | |
| download | bcm5719-llvm-709e3046ee3c473b373fe5ec61e4d6e467991898.tar.gz bcm5719-llvm-709e3046ee3c473b373fe5ec61e4d6e467991898.zip | |
[LoopDataPrefetch] Add TTI to limit the number of iterations to prefetch ahead
Summary:
It can hurt performance to prefetch ahead too much. Be conservative for
now and don't prefetch ahead more than 3 iterations on Cyclone.
Reviewers: hfinkel
Subscribers: llvm-commits, mzolotukhin
Differential Revision: http://reviews.llvm.org/D17949
llvm-svn: 263772
Diffstat (limited to 'llvm/test/Transforms/LoopDataPrefetch/AArch64/large-stride.ll')
| -rw-r--r-- | llvm/test/Transforms/LoopDataPrefetch/AArch64/large-stride.ll | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/test/Transforms/LoopDataPrefetch/AArch64/large-stride.ll b/llvm/test/Transforms/LoopDataPrefetch/AArch64/large-stride.ll index 4e0b9c0a224..437d9415f56 100644 --- a/llvm/test/Transforms/LoopDataPrefetch/AArch64/large-stride.ll +++ b/llvm/test/Transforms/LoopDataPrefetch/AArch64/large-stride.ll @@ -1,4 +1,5 @@ -; RUN: opt -mcpu=cyclone -mtriple=arm64-apple-ios -loop-data-prefetch -S < %s | FileCheck %s --check-prefix=LARGE_PREFETCH --check-prefix=ALL +; RUN: opt -mcpu=cyclone -mtriple=arm64-apple-ios -loop-data-prefetch -cyclone-max-prefetch-iters-ahead=100 -S < %s | FileCheck %s --check-prefix=LARGE_PREFETCH --check-prefix=ALL +; RUN: opt -mcpu=cyclone -mtriple=arm64-apple-ios -loop-data-prefetch -S < %s | FileCheck %s --check-prefix=NO_LARGE_PREFETCH --check-prefix=ALL ; RUN: opt -mcpu=generic -mtriple=arm64-apple-ios -loop-data-prefetch -S < %s | FileCheck %s --check-prefix=NO_LARGE_PREFETCH --check-prefix=ALL target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n32:64-S128" |
