Add a new test case for the llvm.memcpy simplification case.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21561 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 21 insertions, 0 deletions

diff --git a/test/Transforms/SimplifyLibCalls/MemCpy.ll b/test/Transforms/SimplifyLibCalls/MemCpy.ll
new file mode 100644
index 0000000000..5e701b4106
--- /dev/null
+++ b/test/Transforms/SimplifyLibCalls/MemCpy.ll
@@ -0,0 +1,21 @@
+; Test that the StrCatOptimizer works correctly
+; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | not grep 'call.*llvm.memcpy'
+
+declare sbyte* %llvm.memcpy(sbyte*,sbyte*,int,int)
+%h = constant [2 x sbyte] c"h\00"
+%hel = constant [4 x sbyte] c"hel\00"
+%hello_u = constant [8 x sbyte] c"hello_u\00"
+
+implementation   ; Functions:
+
+int %main () {
+  %h_p = getelementptr [2 x sbyte]* %h, int 0, int 0
+  %hel_p = getelementptr [4 x sbyte]* %hel, int 0, int 0
+  %hello_u_p = getelementptr [8 x sbyte]* %hello_u, int 0, int 0
+  %target = alloca [1024 x sbyte]
+  %target_p = getelementptr [1024 x sbyte]* %target, int 0, int 0
+  call sbyte* %llvm.memcpy(sbyte* %target_p, sbyte* %h_p, int 2, int 2)
+  call sbyte* %llvm.memcpy(sbyte* %target_p, sbyte* %hel_p, int 4, int 4)
+  call sbyte* %llvm.memcpy(sbyte* %target_p, sbyte* %hello_u_p, int 8, int 8)
+  ret int 0
+}