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Enable late-vectorization by default.

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This patch changes the default setting for the LateVectorization flag that controls where the loop-vectorizer is ran.

Perf gains:
SingleSource/Benchmarks/Shootout/matrix -37.33%
MultiSource/Benchmarks/PAQ8p/paq8p  -22.83%
SingleSource/Benchmarks/Linpack/linpack-pc  -16.22%
SingleSource/Benchmarks/Shootout-C++/ary3 -15.16%
MultiSource/Benchmarks/TSVC/NodeSplitting-flt/NodeSplitting-flt -10.34%
MultiSource/Benchmarks/TSVC/NodeSplitting-dbl/NodeSplitting-dbl -7.12%

Regressions:
SingleSource/Benchmarks/Misc/lowercase  15.10%
MultiSource/Benchmarks/TSVC/Equivalencing-flt/Equivalencing-flt 13.18%
SingleSource/Benchmarks/Shootout-C++/matrix 8.27%
SingleSource/Benchmarks/CoyoteBench/lpbench 7.30%

llvm-svn: 189858
This commit is contained in:
Nadav Rotem 2013-09-03 21:33:17 +00:00
parent 88b7b3058d
commit ff7b438ada
1 changed files with 1 additions and 1 deletions
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2
lib/Transforms/IPO/PassManagerBuilder.cpp
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@ -33,7 +33,7 @@ RunLoopVectorization("vectorize-loops",
cl::desc("Run the Loop vectorization passes"));
static cl::opt<bool>
LateVectorization("late-vectorize", cl::init(false), cl::Hidden,
LateVectorization("late-vectorize", cl::init(true), cl::Hidden,
cl::desc("Run the vectorization pasess late in the pass "
"pipeline (after the inliner)"));