+; RUN: llvm-as < %s | llc -mtriple=i386-pc-mingw32
+; PR4572
+
+ %"struct.std::valarray<unsigned int>" = type { i32, i32* }
+
+define void @_ZSt17__gslice_to_indexjRKSt8valarrayIjES2_RS0_(i32 %__o, %"struct.std::valarray<unsigned int>"* nocapture %__l, %"struct.std::valarray<unsigned int>"* nocapture %__s, %"struct.std::valarray<unsigned int>"* nocapture %__i) nounwind {
+entry:
+ %0 = alloca i32, i32 undef, align 4 ; <i32*> [#uses=1]
+ br i1 undef, label %return, label %bb4
+
+bb4: ; preds = %bb7.backedge, %entry
+ %indvar = phi i32 [ %indvar.next, %bb7.backedge ], [ 0, %entry ] ; <i32> [#uses=2]
+ %scevgep24.sum = sub i32 undef, %indvar ; <i32> [#uses=2]
+ %scevgep25 = getelementptr i32* %0, i32 %scevgep24.sum ; <i32*> [#uses=1]
+ %scevgep27 = getelementptr i32* undef, i32 %scevgep24.sum ; <i32*> [#uses=1]
+ %1 = load i32* %scevgep27, align 4 ; <i32> [#uses=0]
+ br i1 undef, label %bb7.backedge, label %bb5
+
+bb5: ; preds = %bb4
+ store i32 0, i32* %scevgep25, align 4
+ br label %bb7.backedge
+
+bb7.backedge: ; preds = %bb5, %bb4
+ %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1]
+ br label %bb4
+
+return: ; preds = %entry
+ ret void
+}