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* [Bug middle-end/43654] New: Very long compile time with -O2 -floop-block
@ 2010-04-05 20:44 zsojka at seznam dot cz
2010-04-05 20:50 ` [Bug middle-end/43654] " zsojka at seznam dot cz
2010-04-18 22:14 ` zsojka at seznam dot cz
0 siblings, 2 replies; 3+ messages in thread
From: zsojka at seznam dot cz @ 2010-04-05 20:44 UTC (permalink / raw)
To: gcc-bugs
Tested revisions:
r157965 - fail (~140s)
r153685 - crash
4.4 r157895 - OK (~0.2s)
Executed on a 1.6GHz CPU, CLooG-PPL 0.15.8, PPL 0.10.2:
$ /mnt/svn/gcc-trunk/binary-157965-lto/bin/gcc -O2 -floop-block testcase.c
-ftime-report -c
Execution times (seconds)
Graphite loop transforms: 135.75 (100%) usr 0.88 (100%) sys 137.88 (100%)
wall 26 kB ( 1%) ggc
Graphite data dep analysis: 0.02 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%)
wall 0 kB ( 0%) ggc
Graphite code generation: 0.05 ( 0%) usr 0.00 ( 0%) sys 0.06 ( 0%) wall
59 kB ( 3%) ggc
tree iv optimization : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
151 kB ( 8%) ggc
tree STMT verifier : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
0 kB ( 0%) ggc
loop invariant motion : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
5 kB ( 0%) ggc
branch prediction : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall
2 kB ( 0%) ggc
reload : 0.01 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
4 kB ( 0%) ggc
TOTAL : 135.87 0.88 137.99
1961 kB
Extra diagnostic checks enabled; compiler may run slowly.
Configure with --enable-checking=release to disable checks.
Disabling checking doesn't help.
--
Summary: Very long compile time with -O2 -floop-block
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: zsojka at seznam dot cz
GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43654
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug middle-end/43654] Very long compile time with -O2 -floop-block
2010-04-05 20:44 [Bug middle-end/43654] New: Very long compile time with -O2 -floop-block zsojka at seznam dot cz
@ 2010-04-05 20:50 ` zsojka at seznam dot cz
2010-04-18 22:14 ` zsojka at seznam dot cz
1 sibling, 0 replies; 3+ messages in thread
From: zsojka at seznam dot cz @ 2010-04-05 20:50 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from zsojka at seznam dot cz 2010-04-05 20:49 -------
Created an attachment (id=20316)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20316&action=view)
reduced testcase
When the loop body is changed to:
x[i][j][k] = i + j + k;
compilation finishes in ~85s
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43654
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug middle-end/43654] Very long compile time with -O2 -floop-block
2010-04-05 20:44 [Bug middle-end/43654] New: Very long compile time with -O2 -floop-block zsojka at seznam dot cz
2010-04-05 20:50 ` [Bug middle-end/43654] " zsojka at seznam dot cz
@ 2010-04-18 22:14 ` zsojka at seznam dot cz
1 sibling, 0 replies; 3+ messages in thread
From: zsojka at seznam dot cz @ 2010-04-18 22:14 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from zsojka at seznam dot cz 2010-04-18 22:14 -------
-floop-block -fstrict-aliasing also makes
gfortran.fortran-torture/execute/forall_1.f90 to timeout at -O[123s]
--
zsojka at seznam dot cz changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |compile-time-hog
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43654
^ permalink raw reply [flat|nested] 3+ messages in thread
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2010-04-05 20:44 [Bug middle-end/43654] New: Very long compile time with -O2 -floop-block zsojka at seznam dot cz
2010-04-05 20:50 ` [Bug middle-end/43654] " zsojka at seznam dot cz
2010-04-18 22:14 ` zsojka at seznam dot cz
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