--- /dev/null
+; RUN: opt -disable-verify -passes='default<O2>' -S < %s | FileCheck %s
+
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; The local array %tmp can only be optimized away by sroa after loop unroll.
+
+; CHECK-LABEL: define void @foo
+; CHECK-NOT: alloca
+; CHECK-NOT: call void @llvm.memcpy.p0i8.p0i8.i64
+
+; Function Attrs: nounwind uwtable
+define void @foo(i32* %a, i32* %b) {
+entry:
+ %a.addr = alloca i32*, align 8
+ %b.addr = alloca i32*, align 8
+ %tmp = alloca [4 x float], align 16
+ %i = alloca i32, align 4
+ store i32* %a, i32** %a.addr, align 8
+ store i32* %b, i32** %b.addr, align 8
+ store i32 0, i32* %i, align 4
+ br label %for.cond
+
+for.cond: ; preds = %for.inc, %entry
+ %iter2 = load i32, i32* %i, align 4
+ %cmp = icmp slt i32 %iter2, 4
+ br i1 %cmp, label %for.body, label %for.cond.cleanup
+
+for.cond.cleanup: ; preds = %for.cond
+ br label %for.end
+
+for.body: ; preds = %for.cond
+ %inptr = load i32*, i32** %a.addr, align 8
+ %idx2 = load i32, i32* %i, align 4
+ %idxprom = sext i32 %idx2 to i64
+ %arrayidx = getelementptr inbounds i32, i32* %inptr, i64 %idxprom
+ %val = load i32, i32* %arrayidx, align 4
+ %conv = sitofp i32 %val to float
+ %idx = load i32, i32* %i, align 4
+ %idxprom1 = sext i32 %idx to i64
+ %arrayidx2 = getelementptr inbounds [4 x float], [4 x float]* %tmp, i64 0, i64 %idxprom1
+ store float %conv, float* %arrayidx2, align 4
+ br label %for.inc
+
+for.inc: ; preds = %for.body
+ %iter = load i32, i32* %i, align 4
+ %inc = add nsw i32 %iter, 1
+ store i32 %inc, i32* %i, align 4
+ br label %for.cond
+
+for.end: ; preds = %for.cond.cleanup
+ %dstptr = load i32*, i32** %b.addr, align 8
+ %dst = bitcast i32* %dstptr to i8*
+ %arraydecay = getelementptr inbounds [4 x float], [4 x float]* %tmp, i64 0, i64 0
+ %src = bitcast float* %arraydecay to i8*
+ call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 %dst, i8* align 16 %src, i64 16, i1 false)
+ ret void
+}
+
+; Function Attrs: argmemonly nounwind willreturn
+declare void @llvm.memcpy.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64, i1 immarg)