--- /dev/null
+; RUN: opt -loop-idiom < %s -S | FileCheck %s
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+%struct.bigBlock_t = type { [256 x <4 x float>] }
+
+; CHECK-LABEL: @test(
+; CHECK-NOT: llvm.memset
+define void @test(%struct.bigBlock_t* %p) {
+entry:
+ %0 = getelementptr inbounds %struct.bigBlock_t, %struct.bigBlock_t* %p, i64 0, i32 0, i64 0, i64 0
+ br label %for.body
+
+for.body: ; preds = %entry, %for.body
+ %index.02 = phi i32 [ 0, %entry ], [ %add, %for.body ]
+ %dst.01 = phi float* [ %0, %entry ], [ %add.ptr2, %for.body ]
+ %cast.i5 = bitcast float* %dst.01 to <4 x float>*
+ store <4 x float> zeroinitializer, <4 x float>* %cast.i5, align 16, !nontemporal !0
+ %add.ptr1 = getelementptr inbounds float, float* %dst.01, i64 4
+ %cast.i = bitcast float* %add.ptr1 to <4 x float>*
+ store <4 x float> zeroinitializer, <4 x float>* %cast.i, align 16, !nontemporal !0
+ %add.ptr2 = getelementptr inbounds float, float* %dst.01, i64 8
+ %add = add nuw nsw i32 %index.02, 32
+ %cmp = icmp ult i32 %add, 4096
+ br i1 %cmp, label %for.body, label %for.end
+
+for.end: ; preds = %for.body
+ ret void
+}
+
+!0 = !{i32 1}