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| author | Arnold Schwaighofer <aschwaighofer@apple.com> | 2013-11-01 22:18:19 +0000 |
|---|---|---|
| committer | Arnold Schwaighofer <aschwaighofer@apple.com> | 2013-11-01 22:18:19 +0000 |
| commit | a846a7f8f054d5e7dcb39c4f3c585752e824ebe1 (patch) | |
| tree | 006fb5e4147c15b7d7c1888bdb8935d3d82fdebc /llvm/test/Transforms/LoopVectorize/induction_plus.ll | |
| parent | ed265941d4ef9961c68d02eaf5db2e3f6d1d4654 (diff) | |
| download | bcm5719-llvm-a846a7f8f054d5e7dcb39c4f3c585752e824ebe1.tar.gz bcm5719-llvm-a846a7f8f054d5e7dcb39c4f3c585752e824ebe1.zip | |
LoopVectorizer: Perform redundancy elimination on induction variables
When the loop vectorizer was part of the SCC inliner pass manager gvn would
run after the loop vectorizer followed by instcombine. This way redundancy
(multiple uses) were removed and instcombine could perform scalarization on the
induction variables. Having moved the loop vectorizer to later we no longer run
any form of redundancy elimination before we perform instcombine. This caused
vectorized induction variables to survive that did not before.
On a recent iMac this helps linpack back from 6000Mflops to 7000Mflops.
This should also help lpbench and paq8p.
I ran a Release (without Asserts) build over the test-suite and did not see any
negative impact on compile time.
radar://15339680
llvm-svn: 193891
Diffstat (limited to 'llvm/test/Transforms/LoopVectorize/induction_plus.ll')
| -rw-r--r-- | llvm/test/Transforms/LoopVectorize/induction_plus.ll | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/test/Transforms/LoopVectorize/induction_plus.ll b/llvm/test/Transforms/LoopVectorize/induction_plus.ll index 6141c39462a..9c8201ab780 100644 --- a/llvm/test/Transforms/LoopVectorize/induction_plus.ll +++ b/llvm/test/Transforms/LoopVectorize/induction_plus.ll @@ -6,8 +6,8 @@ target triple = "x86_64-apple-macosx10.8.0" @array = common global [1024 x i32] zeroinitializer, align 16 ;CHECK-LABEL: @array_at_plus_one( -;CHECK: trunc i64 ;CHECK: add i64 %index, 12 +;CHECK: trunc i64 ;CHECK: ret i32 define i32 @array_at_plus_one(i32 %n) nounwind uwtable ssp { %1 = icmp sgt i32 %n, 0 |
