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| author | Nadav Rotem <nrotem@apple.com> | 2012-10-22 04:38:00 +0000 |
|---|---|---|
| committer | Nadav Rotem <nrotem@apple.com> | 2012-10-22 04:38:00 +0000 |
| commit | 565048e78a152aa69b66422037b67c0f627bbfec (patch) | |
| tree | 9bd888d016f8cb8a0f2ca49c9f7c2d81b43451df /test | |
| parent | e0fa403e23ab5610471c2dbe5c032327ee1ed091 (diff) | |
| download | llvm-565048e78a152aa69b66422037b67c0f627bbfec.tar.gz llvm-565048e78a152aa69b66422037b67c0f627bbfec.tar.bz2 llvm-565048e78a152aa69b66422037b67c0f627bbfec.tar.xz | |
Vectorizer: optimize the generation of selects. If the condition is uniform, generate a scalar-cond select (i1 as selector).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166409 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/Transforms/LoopVectorize/scalar-select.ll | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/test/Transforms/LoopVectorize/scalar-select.ll b/test/Transforms/LoopVectorize/scalar-select.ll new file mode 100644 index 0000000000..8d5b6fd8af --- /dev/null +++ b/test/Transforms/LoopVectorize/scalar-select.ll @@ -0,0 +1,37 @@ +; RUN: opt < %s -loop-vectorize -dce -instcombine -licm -S | FileCheck %s + +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-s0:64:64-f80:128:128-n8:16:32:64-S128" +target triple = "x86_64-apple-macosx10.8.0" + +@a = common global [2048 x i32] zeroinitializer, align 16 +@b = common global [2048 x i32] zeroinitializer, align 16 +@c = common global [2048 x i32] zeroinitializer, align 16 + +;CHECK: @example1 +;CHECK: load <4 x i32> +; make sure that we have a scalar condition and a vector operand. +;CHECK: select i1 %cond, <4 x i32> +;CHECK: store <4 x i32> +;CHECK: ret void +define void @example1(i1 %cond) nounwind uwtable ssp { + br label %1 + +; <label>:1 ; preds = %1, %0 + %indvars.iv = phi i64 [ 0, %0 ], [ %indvars.iv.next, %1 ] + %2 = getelementptr inbounds [2048 x i32]* @b, i64 0, i64 %indvars.iv + %3 = load i32* %2, align 4 + %4 = getelementptr inbounds [2048 x i32]* @c, i64 0, i64 %indvars.iv + %5 = load i32* %4, align 4 + %6 = add nsw i32 %5, %3 + %7 = getelementptr inbounds [2048 x i32]* @a, i64 0, i64 %indvars.iv + %sel = select i1 %cond, i32 %6, i32 zeroinitializer + store i32 %sel, i32* %7, align 4 + %indvars.iv.next = add i64 %indvars.iv, 1 + %lftr.wideiv = trunc i64 %indvars.iv.next to i32 + %exitcond = icmp eq i32 %lftr.wideiv, 256 + br i1 %exitcond, label %8, label %1 + +; <label>:8 ; preds = %1 + ret void +} + |