Commit 45d220cac6e9dbb130b48554915233672c240b7b | zig

Implement __builtin_expect so C code that uses assert() can be translated.

2 files changed, 29 insertions(+), 0 deletions(-)

lib/std/c/builtins.zig+6

...	...	@@ -182,3 +182,9 @@ pub fn __builtin_memcpy(
182	182	@memcpy(dst_cast, src_cast, len);
183	183	return dst;
184	184	}
	185
	186	/// The return value of __builtin_expect is `expr`. `c` is the expected value
	187	/// of `expr` and is used as a hint to the compiler in C. Here it is unused.
	188	pub fn __builtin_expect(expr: c_long, c: c_long) callconv(.Inline) c_long {
	189	return expr;
	190	}

test/run_translated_c.zig+23

...	...	@@ -1106,4 +1106,27 @@ pub fn addCases(cases: *tests.RunTranslatedCContext) void {
1106	1106	\\ return 0;
1107	1107	\\}
1108	1108	, "");
	1109
	1110	cases.add("handle assert.h",
	1111	\\#include <assert.h>
	1112	\\int main() {
	1113	\\ int x = 1;
	1114	\\ int *xp = &x;
	1115	\\ assert(1);
	1116	\\ assert(x != 0);
	1117	\\ assert(xp);
	1118	\\ assert(*xp);
	1119	\\ return 0;
	1120	\\}
	1121	, "");
	1122
	1123	cases.add("NDEBUG disables assert",
	1124	\\#define NDEBUG
	1125	\\#include <assert.h>
	1126	\\int main() {
	1127	\\ assert(0);
	1128	\\ assert(NULL);
	1129	\\ return 0;
	1130	\\}
	1131	, "");
1109	1132	}