Vectorizer: Add support for loop reductions.

For example:

  for (i=0; i<n; i++)
   sum += A[i] +  B[i] + i;

llvm-svn: 166351

1 files changed, 0 insertions, 35 deletions

diff --git a/llvm/test/Transforms/LoopVectorize/increment.ll b/llvm/test/Transforms/LoopVectorize/increment.ll
deleted file mode 100644
index e944a9af92d..00000000000
--- a/llvm/test/Transforms/LoopVectorize/increment.ll
+++ /dev/null
@@ -1,35 +0,0 @@
-; 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
-
-; This is the loop.
-;  for (i=0; i<n; i++){
-;    a[i] += i;
-;  }
-;CHECK: @inc
-;CHECK: load <4 x i32>
-;CHECK: add <4 x i32>
-;CHECK: store <4 x i32>
-;CHECK: ret void
-define void @inc(i32 %n) nounwind uwtable noinline ssp {
-  %1 = icmp sgt i32 %n, 0
-  br i1 %1, label %.lr.ph, label %._crit_edge
-
-.lr.ph:                                           ; preds = %0, %.lr.ph
-  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %0 ]
-  %2 = getelementptr inbounds [2048 x i32]* @a, i64 0, i64 %indvars.iv
-  %3 = load i32* %2, align 4
-  %4 = trunc i64 %indvars.iv to i32
-  %5 = add nsw i32 %3, %4
-  store i32 %5, i32* %2, 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, %n
-  br i1 %exitcond, label %._crit_edge, label %.lr.ph
-
-._crit_edge:                                      ; preds = %.lr.ph, %0
-  ret void
-}