1 files changed, 43 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyLibCalls/StpCpy.ll b/test/Transforms/SimplifyLibCalls/StpCpy.ll
new file mode 100644
index 000000000000..914b0955bc90
--- /dev/null
+++ b/test/Transforms/SimplifyLibCalls/StpCpy.ll
@@ -0,0 +1,43 @@
+; Test that the StpCpyOptimizer works correctly
+; RUN: opt < %s -simplify-libcalls -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"
+
+declare i8* @stpcpy(i8*, i8*)
+
+declare i8* @__stpcpy_chk(i8*, i8*, i32) nounwind
+
+declare i32 @llvm.objectsize.i32(i8*, i1) nounwind readonly
+
+define i32 @t1() {
+; CHECK: @t1
+  %target = alloca [1024 x i8]
+  %arg1 = getelementptr [1024 x i8]* %target, i32 0, i32 0
+  %arg2 = getelementptr [6 x i8]* @hello, i32 0, i32 0
+  %rslt1 = call i8* @stpcpy( i8* %arg1, i8* %arg2 )
+; CHECK: @llvm.memcpy.p0i8.p0i8.i32
+  ret i32 0
+}
+
+define i32 @t2() {
+; CHECK: @t2
+  %target = alloca [1024 x i8]
+  %arg1 = getelementptr [1024 x i8]* %target, i32 0, i32 0
+  %arg2 = getelementptr [6 x i8]* @hello, i32 0, i32 0
+  %tmp1 = call i32 @llvm.objectsize.i32(i8* %arg1, i1 false)
+  %rslt1 = call i8* @__stpcpy_chk(i8* %arg1, i8* %arg2, i32 %tmp1)
+; CHECK: @__memcpy_chk
+  ret i32 0
+}
+
+define i8* @t3(i8* %arg) {
+; CHECK: @t3
+  %stpcpy = tail call i8* @stpcpy(i8* %arg, i8* %arg)
+; CHECK: [[LEN:%[a-z]+]] = call i32 @strlen(i8* %arg)
+; CHECK-NEXT: getelementptr inbounds i8* %arg, i32 [[LEN]]
+  ret i8* %stpcpy
+}