Fix `mem.set` for LLVM C API

core/mem/mem.odin

@@ -13,16 +13,26 @@ swap :: proc{swap16, swap32, swap64};
 
 set :: proc "contextless" (data: rawptr, value: byte, len: int) -> rawptr {
 	foreign _ {
-		when size_of(rawptr) == 8 {
-			@(link_name="llvm.memset.p0i8.i64")
-			llvm_memset :: proc(dst: rawptr, val: byte, len: int, is_volatile: bool) ---;
+		when ODIN_USE_LLVM_API {
+			when size_of(rawptr) == 8 {
+				@(link_name="llvm.memset.p0i8.i64")
+				memset :: proc(dst: rawptr, val: byte, len: int, is_volatile: bool = false) ---;
+			} else {
+				@(link_name="llvm.memset.p0i8.i32")
+				memset :: proc(dst: rawptr, val: byte, len: int, is_volatile: bool = false) ---;
+			}
 		} else {
-			@(link_name="llvm.memset.p0i8.i32")
-			llvm_memset :: proc(dst: rawptr, val: byte, len: int, is_volatile: bool) ---;
+			when size_of(rawptr) == 8 {
+				@(link_name="llvm.memset.p0i8.i64")
+				memset :: proc(dst: rawptr, val: byte, len: int, align: i32 = 1, is_volatile: bool = false) ---;
+			} else {
+				@(link_name="llvm.memset.p0i8.i32")
+				memset :: proc(dst: rawptr, val: byte, len: int, align: i32 = 1, is_volatile: bool = false) ---;
+			}
 		}
 	}
 
-	llvm_memset(data, value, len, false);
+	memset(data, value, len);
 	return data;
 }
 zero :: inline proc "contextless" (data: rawptr, len: int) -> rawptr {