Slightly generalize transformation of memmove(a,a,n) so that it also applies
to memcpy. (Such a memcpy is technically illegal, but in practice is safe
and is generated by struct self-assignment in C code.)
llvm-svn: 91621
diff --git a/llvm/test/Transforms/InstCombine/memcpy.ll b/llvm/test/Transforms/InstCombine/memcpy.ll
new file mode 100644
index 0000000..2e7b2c0
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/memcpy.ll
@@ -0,0 +1,10 @@
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+declare void @llvm.memcpy.i32(i8*, i8*, i32, i32)
+
+define void @test4(i8* %a) {
+ tail call void @llvm.memcpy.i32( i8* %a, i8* %a, i32 100, i32 1 )
+ ret void
+}
+; CHECK: define void @test4
+; CHECK-NEXT: ret void