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diff --git a/test/Transforms/InstCombine/strcpy-1.ll b/test/Transforms/InstCombine/strcpy-1.ll
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+; Test that the strcpy library call simplifier works correctly.
+; rdar://6839935
+; RUN: opt < %s -instcombine -S | FileCheck %s
+;
+; This transformation requires the pointer size, as it assumes that size_t is
+; the size of a pointer.
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32"
+
+@hello = constant [6 x i8] c"hello\00"
+@a = common global [32 x i8] zeroinitializer, align 1
+@b = common global [32 x i8] zeroinitializer, align 1
+
+declare i8* @strcpy(i8*, i8*)
+
+define void @test_simplify1() {
+; CHECK: @test_simplify1
+
+ %dst = getelementptr [32 x i8]* @a, i32 0, i32 0
+ %src = getelementptr [6 x i8]* @hello, i32 0, i32 0
+
+ call i8* @strcpy(i8* %dst, i8* %src)
+; CHECK: @llvm.memcpy.p0i8.p0i8.i32
+ ret void
+}
+
+define i8* @test_simplify2() {
+; CHECK: @test_simplify2
+
+ %dst = getelementptr [32 x i8]* @a, i32 0, i32 0
+
+ %ret = call i8* @strcpy(i8* %dst, i8* %dst)
+; CHECK: ret i8* getelementptr inbounds ([32 x i8]* @a, i32 0, i32 0)
+ ret i8* %ret
+}
+
+define i8* @test_no_simplify1() {
+; CHECK: @test_no_simplify1
+
+ %dst = getelementptr [32 x i8]* @a, i32 0, i32 0
+ %src = getelementptr [32 x i8]* @b, i32 0, i32 0
+
+ %ret = call i8* @strcpy(i8* %dst, i8* %src)
+; CHECK: call i8* @strcpy
+ ret i8* %ret
+}