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LoopVectorizer: Optimize the vectorization of consecutive memory access when the iteration step is -1

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171114 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem
2012-12-26 19:08:17 +00:00
parent f1a26cf9df
commit 13eb1e7817
3 changed files with 73 additions and 24 deletions
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3
test/Transforms/LoopVectorize/gcc-examples.ll
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@@ -537,7 +537,8 @@ define void @example14(i32** nocapture %in, i32** nocapture %coeff, i32* nocaptu
}
;CHECK: @example21
;CHECK: <4 x i32>
;CHECK: load <4 x i32>
;CHECK: shufflevector {{.*}} <i32 3, i32 2, i32 1, i32 0>
;CHECK: ret i32
define i32 @example21(i32* nocapture %b, i32 %n) nounwind uwtable readonly ssp {
%1 = icmp sgt i32 %n, 0