1 files changed, 40 insertions, 0 deletions
diff --git a/test/Transforms/LoopVectorize/cost-model.ll b/test/Transforms/LoopVectorize/cost-model.ll
new file mode 100644
index 0000000000..20c710db46
--- /dev/null
+++ b/test/Transforms/LoopVectorize/cost-model.ll
@@ -0,0 +1,40 @@
+; RUN: opt < %s  -loop-vectorize -mtriple=x86_64-apple-macosx10.8.0 -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"
+
+@c = common global [2048 x i32] zeroinitializer, align 16
+@b = common global [2048 x i32] zeroinitializer, align 16
+@d = common global [2048 x i32] zeroinitializer, align 16
+@a = common global [2048 x i32] zeroinitializer, align 16
+
+; At this point the cost model is pretty bad and we are vectorizing the code below.
+; TODO: This code should not be vectorized on x86.
+;CHECK: cost_model_1
+;CHECK: <4 x i32>
+;CHECK: ret void
+define void @cost_model_1() nounwind uwtable noinline ssp {
+entry:
+  br label %for.body
+
+for.body:                                         ; preds = %for.body, %entry
+  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
+  %0 = shl nsw i64 %indvars.iv, 1
+  %arrayidx = getelementptr inbounds [2048 x i32]* @c, i64 0, i64 %0
+  %1 = load i32* %arrayidx, align 8
+  %idxprom1 = sext i32 %1 to i64
+  %arrayidx2 = getelementptr inbounds [2048 x i32]* @b, i64 0, i64 %idxprom1
+  %2 = load i32* %arrayidx2, align 4
+  %arrayidx4 = getelementptr inbounds [2048 x i32]* @d, i64 0, i64 %indvars.iv
+  %3 = load i32* %arrayidx4, align 4
+  %idxprom5 = sext i32 %3 to i64
+  %arrayidx6 = getelementptr inbounds [2048 x i32]* @a, i64 0, i64 %idxprom5
+  store i32 %2, i32* %arrayidx6, 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 %for.end, label %for.body
+
+for.end:                                          ; preds = %for.body
+  ret void
+}