From: Aldy Hernandez <aldyh@redhat.com>
To: Jakub Jelinek <jakub@redhat.com>
Cc: Richard Sandiford <rdsandiford@googlemail.com>,
gcc-patches <gcc-patches@gcc.gnu.org>
Subject: Re: PR target/52555: attribute optimize is overriding command line options
Date: Tue, 12 Feb 2013 15:58:00 -0000 [thread overview]
Message-ID: <511A66AE.4070903@redhat.com> (raw)
In-Reply-To: <20130212140503.GD4385@tucnak.redhat.com>
[-- Attachment #1: Type: text/plain, Size: 918 bytes --]
>> Jakub, what's this you mention in the PR about caching
>> __optimize__((3))? You also mention I shouldn't compare against
>> this_target_optabs, but default_target_optabs. But what if
>> this_target_optabs has changed? (See patch).
>
> The reason for that is that this_target_optabs could at that point be
> simply whatever optabs used the last parsed function.
> this_target_optabs changes only either because of optimize attribute
> (not sure if MIPS as the only switchable target? supports that), or
> because of mips_set_mips16_mode. I think invoke_set_current_function_hook
> invokes the target hook after the code you've changed, so I'd say it should
> work fine even on MIPS. CCing Richard for that anyway.
Ok, fixed.
> I think you should just use XCNEW and drop the memset.
Perfect. Done.
> Shouldn't this (and above) be XDELETE to match the allocation style?
Absolutely. Done.
OK for trunk?
[-- Attachment #2: curr --]
[-- Type: text/plain, Size: 5359 bytes --]
commit ee1f2aebe23fe0d5cecfdfde9822ef681bf6ef0c
Author: Aldy Hernandez <aldyh@redhat.com>
Date: Mon Feb 11 15:51:24 2013 -0600
PR target/52555
* tree.h (struct tree_optimization_option): New field
target_optabs.
(TREE_OPTIMIZATION_OPTABS): New.
(save_optabs_if_changed): Protoize.
* optabs.h: Always declare this_target_optabs.
* optabs.c (save_optabs_if_changed): New.
Always declare this_target_optabs.
* function.c (invoke_set_current_function_hook): Set
this_target_optabs if there is one in the optimization node.
c-family/
* c-common.c (handle_optimize_attribute): Call
save_optabs_if_changed.
diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c
index 1e6afaa..3711e69 100644
--- a/gcc/c-family/c-common.c
+++ b/gcc/c-family/c-common.c
@@ -8925,6 +8925,8 @@ handle_optimize_attribute (tree *node, tree name, tree args,
DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node)
= build_optimization_node ();
+ save_optabs_if_changed (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (*node));
+
/* Restore current options. */
cl_optimization_restore (&global_options, &cur_opts);
}
diff --git a/gcc/function.c b/gcc/function.c
index 4ce2259..f37e91f 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -4397,6 +4397,13 @@ invoke_set_current_function_hook (tree fndecl)
{
optimization_current_node = opts;
cl_optimization_restore (&global_options, TREE_OPTIMIZATION (opts));
+
+ /* Change optabs if needed. */
+ if (TREE_OPTIMIZATION_OPTABS (opts))
+ this_target_optabs
+ = (struct target_optabs *) TREE_OPTIMIZATION_OPTABS (opts);
+ else
+ this_target_optabs = &default_target_optabs;
}
targetm.set_current_function (fndecl);
diff --git a/gcc/optabs.c b/gcc/optabs.c
index c1dacf4..11153aa 100644
--- a/gcc/optabs.c
+++ b/gcc/optabs.c
@@ -44,8 +44,8 @@ along with GCC; see the file COPYING3. If not see
struct target_optabs default_target_optabs;
struct target_libfuncs default_target_libfuncs;
-#if SWITCHABLE_TARGET
struct target_optabs *this_target_optabs = &default_target_optabs;
+#if SWITCHABLE_TARGET
struct target_libfuncs *this_target_libfuncs = &default_target_libfuncs;
#endif
@@ -6207,6 +6207,40 @@ init_optabs (void)
targetm.init_libfuncs ();
}
+/* Recompute the optabs. If they have changed, save the new set of
+ optabs in the optimization node OPTNODE. */
+
+void
+save_optabs_if_changed (tree optnode)
+{
+ struct target_optabs *save_target_optabs = this_target_optabs;
+ struct target_optabs *tmp_target_optabs = XCNEW (struct target_optabs);
+
+ /* Generate a new set of optabs into tmp_target_optabs. */
+ this_target_optabs = tmp_target_optabs;
+ init_all_optabs ();
+ this_target_optabs = save_target_optabs;
+
+ /* If the optabs changed, record it in the node. */
+ if (memcmp (tmp_target_optabs, &default_target_optabs,
+ sizeof (struct target_optabs)))
+ {
+ /* ?? An existing entry in TREE_OPTIMIZATION_OPTABS indicates
+ multiple ((optimize)) attributes for the same function. Is
+ this even valid? For now, just clobber the existing entry
+ with the new optabs. */
+ if (TREE_OPTIMIZATION_OPTABS (optnode))
+ XDELETE (TREE_OPTIMIZATION_OPTABS (optnode));
+
+ TREE_OPTIMIZATION_OPTABS (optnode) = tmp_target_optabs;
+ }
+ else
+ {
+ TREE_OPTIMIZATION_OPTABS (optnode) = NULL;
+ XDELETE (tmp_target_optabs);
+ }
+}
+
/* A helper function for init_sync_libfuncs. Using the basename BASE,
install libfuncs into TAB for BASE_N for 1 <= N <= MAX. */
diff --git a/gcc/optabs.h b/gcc/optabs.h
index c08adcf..2e8b6ec 100644
--- a/gcc/optabs.h
+++ b/gcc/optabs.h
@@ -76,11 +76,7 @@ struct target_optabs {
};
extern struct target_optabs default_target_optabs;
-#if SWITCHABLE_TARGET
extern struct target_optabs *this_target_optabs;
-#else
-#define this_target_optabs (&default_target_optabs)
-#endif
\f
/* Define functions given in optabs.c. */
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr52555.c b/gcc/testsuite/gcc.c-torture/compile/pr52555.c
new file mode 100644
index 0000000..7016834
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr52555.c
@@ -0,0 +1,10 @@
+/* { dg-options "-ffast-math" } */
+
+float farg;
+unsigned val;
+
+void __attribute__((optimize("O")))
+test()
+{
+ val = __builtin_ceilf(farg);
+}
diff --git a/gcc/tree.h b/gcc/tree.h
index c3c814c..eddbca8 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -3586,14 +3586,25 @@ struct GTY(()) tree_optimization_option {
/* The optimization options used by the user. */
struct cl_optimization opts;
+
+ /* Target optabs for this set of optimization options. This is of
+ type `struct target_optabs *'. */
+ void *GTY ((skip)) target_optabs;
};
#define TREE_OPTIMIZATION(NODE) \
(&OPTIMIZATION_NODE_CHECK (NODE)->optimization.opts)
+#define TREE_OPTIMIZATION_OPTABS(NODE) \
+ (OPTIMIZATION_NODE_CHECK (NODE)->optimization.target_optabs)
+
/* Return a tree node that encapsulates the current optimization options. */
extern tree build_optimization_node (void);
+/* Save a new set of target_optabs in a TREE_OPTIMIZATION node if the
+ current set of optabs has changed. */
+extern void save_optabs_if_changed (tree);
+
/* Target options used by a function. */
struct GTY(()) tree_target_option {
next prev parent reply other threads:[~2013-02-12 15:58 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-12 0:15 Aldy Hernandez
2013-02-12 14:05 ` Jakub Jelinek
2013-02-12 15:58 ` Aldy Hernandez [this message]
2013-02-12 16:16 ` Jakub Jelinek
2013-02-12 16:30 ` Richard Sandiford
2013-02-12 17:28 ` Aldy Hernandez
2013-02-12 17:48 ` Richard Sandiford
2013-02-12 17:46 ` Richard Sandiford
2013-02-13 17:39 ` Aldy Hernandez
2013-02-13 17:58 ` Richard Sandiford
2013-02-13 18:08 ` Aldy Hernandez
2013-02-13 19:54 ` Jakub Jelinek
2013-02-15 17:23 ` Aldy Hernandez
2013-02-15 17:35 ` Jakub Jelinek
2013-02-15 17:52 ` Aldy Hernandez
2013-02-16 11:20 ` Richard Sandiford
2013-02-18 18:51 ` Aldy Hernandez
2013-02-18 23:05 ` Jakub Jelinek
2013-02-21 23:03 ` Steve Ellcey
2013-02-22 0:10 ` Aldy Hernandez
2013-02-22 10:03 ` Jakub Jelinek
2013-02-22 17:32 ` Steve Ellcey
2013-02-22 18:17 ` Jakub Jelinek
2013-02-22 19:49 ` Richard Sandiford
2013-03-01 23:37 ` Steve Ellcey
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=511A66AE.4070903@redhat.com \
--to=aldyh@redhat.com \
--cc=gcc-patches@gcc.gnu.org \
--cc=jakub@redhat.com \
--cc=rdsandiford@googlemail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).