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| author | Hal Finkel <hfinkel@anl.gov> | 2014-03-31 23:23:51 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2014-03-31 23:23:51 +0000 |
| commit | 86b3064f2bfb111121f740c71e2c569f0683ca96 (patch) | |
| tree | efc28a8e6f8f9b228bb128845a24e0932cd7e54d /llvm/test/Transforms/LoopVectorize | |
| parent | da91cbdfa8e3da11f63e0b3436e1593a60bdfb13 (diff) | |
| download | bcm5719-llvm-86b3064f2bfb111121f740c71e2c569f0683ca96.tar.gz bcm5719-llvm-86b3064f2bfb111121f740c71e2c569f0683ca96.zip | |
Move partial/runtime unrolling late in the pipeline
The generic (concatenation) loop unroller is currently placed early in the
standard optimization pipeline. This is a good place to perform full unrolling,
but not the right place to perform partial/runtime unrolling. However, most
targets don't enable partial/runtime unrolling, so this never mattered.
However, even some x86 cores benefit from partial/runtime unrolling of very
small loops, and follow-up commits will enable this. First, we need to move
partial/runtime unrolling late in the optimization pipeline (importantly, this
is after SLP and loop vectorization, as vectorization can drastically change
the size of a loop), while keeping the full unrolling where it is now. This
change does just that.
llvm-svn: 205264
Diffstat (limited to 'llvm/test/Transforms/LoopVectorize')
| -rw-r--r-- | llvm/test/Transforms/LoopVectorize/X86/already-vectorized.ll | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/test/Transforms/LoopVectorize/X86/already-vectorized.ll b/llvm/test/Transforms/LoopVectorize/X86/already-vectorized.ll index 885418c0fdd..faed77d66dc 100644 --- a/llvm/test/Transforms/LoopVectorize/X86/already-vectorized.ll +++ b/llvm/test/Transforms/LoopVectorize/X86/already-vectorized.ll @@ -1,4 +1,4 @@ -; RUN: opt < %s -debug-only=loop-vectorize -O3 -S 2>&1 | FileCheck %s +; RUN: opt < %s -disable-loop-unrolling -debug-only=loop-vectorize -O3 -S 2>&1 | FileCheck %s ; REQUIRES: asserts ; We want to make sure that we don't even try to vectorize loops again ; The vectorizer used to mark the un-vectorized loop only as already vectorized |
