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* [Bug middle-end/54827] New: [4.8 Regression] 70% compile time regression building builtin-sched.c from Linux's perf
@ 2012-10-05 17:40 markus at trippelsdorf dot de
2012-10-05 17:41 ` [Bug middle-end/54827] " markus at trippelsdorf dot de
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: markus at trippelsdorf dot de @ 2012-10-05 17:40 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54827
Bug #: 54827
Summary: [4.8 Regression] 70% compile time regression building
builtin-sched.c from Linux's perf
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: markus@trippelsdorf.de
With gcc-4.7.2 I get:
% time gcc -c -O3 -g builtin-sched.i
gcc -c -O3 -g builtin-sched.i 12.63s user 0.02s system 99% cpu 12.690 total
With current trunk:
% time gcc -c -O3 -g builtin-sched.i
gcc -c -O3 -g builtin-sched.i 40.54s user 0.03s system 99% cpu 40.703 total
perf report shows:
54.58% cc1 cc1 [.] find_base_term(rtx_def*)
8.02% cc1 cc1 [.]
ix86_find_base_term(rtx_def*)
3.55% cc1 cc1 [.]
rtx_equal_for_memref_p(rtx_def const*, rtx_def const*)
2.91% cc1 cc1 [.] true_dependence_1(rtx_def
const*, machine_mode, rtx_def*, rtx_def const*, rtx_def*, bool)
2.79% cc1 cc1 [.] memrefs_conflict_p(int,
rtx_def*, int, rtx_def*, long)
2.77% cc1 cc1 [.] exp_equiv_p(rtx_def
const*, rtx_def const*, int, bool)
2.01% cc1 cc1 [.] for_each_rtx_1(rtx_def*,
int, int (*)(rtx_def**, void*), void*)
1.76% cc1 cc1 [.] rtx_equal_p(rtx_def
const*, rtx_def const*)
-ftime-report:
Execution times (seconds)
phase setup : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
1101 kB ( 3%) ggc
phase parsing : 0.07 ( 0%) usr 0.07 (70%) sys 0.14 ( 0%) wall
13463 kB (32%) ggc
phase opt and generate : 39.64 (100%) usr 0.03 (30%) sys 39.79 (100%)
wall 26000 kB (62%) ggc
...
variable tracking : 1.58 ( 4%) usr 0.00 ( 0%) sys 1.57 ( 4%) wall
1210 kB ( 3%) ggc
var-tracking dataflow : 13.68 (34%) usr 0.00 ( 0%) sys 13.71 (34%) wall
107 kB ( 0%) ggc
var-tracking emit : 14.20 (36%) usr 0.00 ( 0%) sys 14.26 (36%) wall
435 kB ( 1%) ggc
...
TOTAL : 39.74 0.10 39.96
41799 kB
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug middle-end/54827] [4.8 Regression] 70% compile time regression building builtin-sched.c from Linux's perf
2012-10-05 17:40 [Bug middle-end/54827] New: [4.8 Regression] 70% compile time regression building builtin-sched.c from Linux's perf markus at trippelsdorf dot de
@ 2012-10-05 17:41 ` markus at trippelsdorf dot de
2012-10-05 17:55 ` markus at trippelsdorf dot de
2012-10-05 17:57 ` markus at trippelsdorf dot de
2 siblings, 0 replies; 4+ messages in thread
From: markus at trippelsdorf dot de @ 2012-10-05 17:41 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54827
--- Comment #1 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-10-05 17:41:20 UTC ---
Created attachment 28366
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28366
testcase
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug middle-end/54827] [4.8 Regression] 70% compile time regression building builtin-sched.c from Linux's perf
2012-10-05 17:40 [Bug middle-end/54827] New: [4.8 Regression] 70% compile time regression building builtin-sched.c from Linux's perf markus at trippelsdorf dot de
2012-10-05 17:41 ` [Bug middle-end/54827] " markus at trippelsdorf dot de
@ 2012-10-05 17:55 ` markus at trippelsdorf dot de
2012-10-05 17:57 ` markus at trippelsdorf dot de
2 siblings, 0 replies; 4+ messages in thread
From: markus at trippelsdorf dot de @ 2012-10-05 17:55 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54827
--- Comment #2 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-10-05 17:54:57 UTC ---
Caused by var-tracking. With-fno-var-tracking everything is fine again:
% time gcc -fno-var-tracking -w -c -O3 -ggdb3 builtin-sched.i
gcc -fno-var-tracking -w -c -O3 -ggdb3 builtin-sched.i 10.50s user 0.04s
system 99% cpu 10.574 total
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug middle-end/54827] [4.8 Regression] 70% compile time regression building builtin-sched.c from Linux's perf
2012-10-05 17:40 [Bug middle-end/54827] New: [4.8 Regression] 70% compile time regression building builtin-sched.c from Linux's perf markus at trippelsdorf dot de
2012-10-05 17:41 ` [Bug middle-end/54827] " markus at trippelsdorf dot de
2012-10-05 17:55 ` markus at trippelsdorf dot de
@ 2012-10-05 17:57 ` markus at trippelsdorf dot de
2 siblings, 0 replies; 4+ messages in thread
From: markus at trippelsdorf dot de @ 2012-10-05 17:57 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54827
Markus Trippelsdorf <markus at trippelsdorf dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |DUPLICATE
--- Comment #3 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-10-05 17:57:08 UTC ---
Dup of 54402
*** This bug has been marked as a duplicate of bug 54402 ***
^ permalink raw reply [flat|nested] 4+ messages in thread
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2012-10-05 17:40 [Bug middle-end/54827] New: [4.8 Regression] 70% compile time regression building builtin-sched.c from Linux's perf markus at trippelsdorf dot de
2012-10-05 17:41 ` [Bug middle-end/54827] " markus at trippelsdorf dot de
2012-10-05 17:55 ` markus at trippelsdorf dot de
2012-10-05 17:57 ` markus at trippelsdorf dot de
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