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[PATCH] For -fno-builtin disable pattern recognition if not enabled explicitly in lto.
- From: Kito Cheng <kito dot cheng at gmail dot com>
- To: Richard Biener <rguenther at suse dot de>, "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
- Date: Thu, 28 Aug 2014 18:25:34 +0800
- Subject: [PATCH] For -fno-builtin disable pattern recognition if not enabled explicitly in lto.
- Authentication-results: sourceware.org; auth=none
Hi all:
The purpose for this patch is prevent `-flto -O3 -fno-builtin` gen
builtin function,
so checking -fno-builit, and then disable
-ftree-loop-distribute-patterns if if -fno-builit enabled, the prev
discuss in [1], and this patch dependence on [2].
[1] https://gcc.gnu.org/ml/gcc-patches/2014-08/msg02483.html
[2] https://gcc.gnu.org/ml/gcc-patches/2014-08/msg02555.html
From 80922e53ff41b1c08322a0d0ae5b6d947cb39353 Mon Sep 17 00:00:00 2001
From: Kito Cheng <kito.cheng@gmail.com>
Date: Thu, 28 Aug 2014 18:06:48 +0800
Subject: [PATCH 2/2] For -fno-builtin disable pattern recognition if not
enabled explicitly. 2014-09-28 Kito Cheng <kito@0xlab.org>
lto/
* lto-lang.c (lto_post_options): For -fno-builtin disable
pattern recognition if not enabled explicitly.
---
gcc/lto/lto-lang.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/gcc/lto/lto-lang.c b/gcc/lto/lto-lang.c
index 9e8524a..ae022cc 100644
--- a/gcc/lto/lto-lang.c
+++ b/gcc/lto/lto-lang.c
@@ -794,6 +794,11 @@ lto_post_options (const char **pfilename ATTRIBUTE_UNUSED)
support. */
flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
+ /* If -fno-builtin then disable pattern recognition. */
+ if (!global_options_set.x_flag_tree_loop_distribute_patterns
+ && flag_no_builtin)
+ flag_tree_loop_distribute_patterns = 0;
+
/* Initialize the compiler back end. */
return false;
}
--
1.9.3