From 0feaa0c4a39b3e0e995cd5897cfd3ebba6a92c48 Mon Sep 17 00:00:00 2001 From: Andres Freund Date: Wed, 13 Sep 2017 19:58:43 -0700 Subject: [PATCH 6/8] Add pg_noinline macro to c.h. Forcing a function not to be inlined can be useful if it's the slow-path of a performance critical function, or should be visible in profiles to allow for proper cost attribution. Author: Andres Freund Discussion: https://postgr.es/m/ --- src/include/c.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/src/include/c.h b/src/include/c.h index 630dfbfc41..087b1eac5b 100644 --- a/src/include/c.h +++ b/src/include/c.h @@ -644,6 +644,22 @@ typedef NameData *Name; #define pg_attribute_noreturn() #endif + +/* + * Forcing a function not to be inlined can be useful if it's the slow-path of + * a performance critical function, or should be visible in profiles to allow + * for proper cost attribution. + */ +/* GCC, Sunpro and XLC support noinline via __attribute */ +#if defined(__GNUC__) || defined(__SUNPRO_C) || defined(__IBMC__) +#define pg_noinline __attribute__((noinline)) +/* msvc via declspec */ +#elif defined(_MSC_VER) +#define pg_noinline __declspec(noinline) +#else +#define pg_noinline +#endif + /* ---------------------------------------------------------------- * Section 6: assertions * ---------------------------------------------------------------- -- 2.14.1.536.g6867272d5b.dirty