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-rw-r--r--src/include/c.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/src/include/c.h b/src/include/c.h
index b6a969787ac..b39bbd7c713 100644
--- a/src/include/c.h
+++ b/src/include/c.h
@@ -642,6 +642,22 @@ 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
* ----------------------------------------------------------------