Implement bzero, memset, memmove builtins.
This subsumes Nico Weber's patch and implements bzero in terms
of llvm.memset to match llvm-gcc.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@53888 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/builtin-memfns.c b/test/CodeGen/builtin-memfns.c
new file mode 100644
index 0000000..d28a48c
--- /dev/null
+++ b/test/CodeGen/builtin-memfns.c
@@ -0,0 +1,11 @@
+// RUN: clang -emit-llvm -o - %s | not grep __builtin
+
+int main(int argc, char **argv) {
+ unsigned char a = 0x11223344;
+ unsigned char b = 0x11223344;
+ __builtin_bzero(&a, sizeof(a));
+ __builtin_memset(&a, 0, sizeof(a));
+ __builtin_memcpy(&a, &b, sizeof(a));
+ __builtin_memmove(&a, &b, sizeof(a));
+ return 0;
+}