Explicitly truncate bswap operand to uint32_t

d0k · gitster · commit b073b7a990de · 2009-11-25T00:16:38.000-08:00
There are some places in git where a long is passed to htonl/ntohl. llvm
doesn't support matching operands of different bitwidths intentionally.
This patch fixes the build with llvm-gcc (and clang) on x86_64.

Signed-off-by: Benjamin Kramer &lt;benny.kra@googlemail.com&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git a/compat/bswap.h b/compat/bswap.h
@@ -24,7 +24,7 @@ static inline uint32_t default_swab32(uint32_t val)
 	if (__builtin_constant_p(x)) { \
 		__res = default_swab32(x); \
 	} else { \
-		__asm__("bswap %0" : "=r" (__res) : "0" (x)); \
+		__asm__("bswap %0" : "=r" (__res) : "0" ((uint32_t)(x))); \
 	} \
 	__res; })
 
