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* [gcc/devel/omp/gcc-12] Come up with {,UN}LIKELY macros.
@ 2022-09-23 15:37 Thomas Schwinge
0 siblings, 0 replies; only message in thread
From: Thomas Schwinge @ 2022-09-23 15:37 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:44b77201a5431450f608b4538fefb1319127de13
commit 44b77201a5431450f608b4538fefb1319127de13
Author: Martin Liska <mliska@suse.cz>
Date: Thu Feb 3 10:58:18 2022 +0100
Come up with {,UN}LIKELY macros.
gcc/ChangeLog:
* system.h (LIKELY): Define.
(UNLIKELY): Likewise.
(cherry picked from commit 22d9c8802add09a93308319fc37dd3a0f1125393, partial)
Diff:
---
gcc/ChangeLog.omp | 8 ++++++++
gcc/system.h | 3 +++
2 files changed, 11 insertions(+)
diff --git a/gcc/ChangeLog.omp b/gcc/ChangeLog.omp
index 4f80bcbd356..30c3abfc15b 100644
--- a/gcc/ChangeLog.omp
+++ b/gcc/ChangeLog.omp
@@ -1,3 +1,11 @@
+2022-09-23 Thomas Schwinge <thomas@codesourcery.com>
+
+ Backport from master branch:
+ 2022-05-09 Martin Liska <mliska@suse.cz>
+
+ * system.h (LIKELY): Define.
+ (UNLIKELY): Likewise.
+
2022-09-12 Tobias Burnus <tobias@codesourcery.com>
Backport from mainline:
diff --git a/gcc/system.h b/gcc/system.h
index e10c34f70ec..6b6868d0bbf 100644
--- a/gcc/system.h
+++ b/gcc/system.h
@@ -736,6 +736,9 @@ extern int vsnprintf (char *, size_t, const char *, va_list);
#define __builtin_expect(a, b) (a)
#endif
+#define LIKELY(x) (__builtin_expect ((x), 1))
+#define UNLIKELY(x) (__builtin_expect ((x), 0))
+
/* Some of the headers included by <memory> can use "abort" within a
namespace, e.g. "_VSTD::abort();", which fails after we use the
preprocessor to redefine "abort" as "fancy_abort" below. */
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