* [Bug tree-optimization/42917] [4.5 Regression] "-fcompare-debug failure" with -ftree-loop-linear
2010-01-31 21:39 [Bug tree-optimization/42917] New: [4.5 Regression] "-fcompare-debug failure" with -ftree-loop-linear zsojka at seznam dot cz
@ 2010-01-31 21:41 ` zsojka at seznam dot cz
2010-01-31 21:59 ` rguenth at gcc dot gnu dot org
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From: zsojka at seznam dot cz @ 2010-01-31 21:41 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from zsojka at seznam dot cz 2010-01-31 21:41 -------
Created an attachment (id=19767)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=19767&action=view)
reduced testcase
Command line:
gcc -O1 -ftree-loop-linear -fcompare-debug -c pr42917.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42917
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2010-01-31 21:39 [Bug tree-optimization/42917] New: [4.5 Regression] "-fcompare-debug failure" with -ftree-loop-linear zsojka at seznam dot cz
2010-01-31 21:41 ` [Bug tree-optimization/42917] " zsojka at seznam dot cz
@ 2010-01-31 21:59 ` rguenth at gcc dot gnu dot org
2010-02-02 13:34 ` rguenth at gcc dot gnu dot org
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From: rguenth at gcc dot gnu dot org @ 2010-01-31 21:59 UTC (permalink / raw)
To: gcc-bugs
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.5.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42917
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2010-01-31 21:39 [Bug tree-optimization/42917] New: [4.5 Regression] "-fcompare-debug failure" with -ftree-loop-linear zsojka at seznam dot cz
2010-01-31 21:41 ` [Bug tree-optimization/42917] " zsojka at seznam dot cz
2010-01-31 21:59 ` rguenth at gcc dot gnu dot org
@ 2010-02-02 13:34 ` rguenth at gcc dot gnu dot org
2010-02-17 13:56 ` jakub at gcc dot gnu dot org
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From: rguenth at gcc dot gnu dot org @ 2010-02-02 13:34 UTC (permalink / raw)
To: gcc-bugs
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42917
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2010-01-31 21:39 [Bug tree-optimization/42917] New: [4.5 Regression] "-fcompare-debug failure" with -ftree-loop-linear zsojka at seznam dot cz
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2010-02-02 13:34 ` rguenth at gcc dot gnu dot org
@ 2010-02-17 13:56 ` jakub at gcc dot gnu dot org
2010-02-19 12:35 ` jakub at gcc dot gnu dot org
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From: jakub at gcc dot gnu dot org @ 2010-02-17 13:56 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from jakub at gcc dot gnu dot org 2010-02-17 13:56 -------
I guess lambda-code.c needs to be taught about debug stmts.
This is actually more important than usual -fcompare-debug differences, here
debug stmt actually prevent the optimization altogether.
Without -g the loops are perfectly nested (perfect_nest_p succeeds), without it
the debug stmt cause both perfect_nest_p and can_convert_to_perfect_nest to
fail.
I guess best would be to ignore debug stmts in these functions, and do
something about them in perfect_nestify and in lambda_loopnest_to_gcc_loopnest,
but am not sure it will actually possible.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42917
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2010-02-17 13:56 ` jakub at gcc dot gnu dot org
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From: jakub at gcc dot gnu dot org @ 2010-02-19 12:35 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from jakub at gcc dot gnu dot org 2010-02-19 12:35 -------
I've tried
--- gcc/lambda-code.c.jj 2009-11-25 16:47:37.000000000 +0100
+++ gcc/lambda-code.c 2010-02-17 15:00:40.000000000 +0100
@@ -1885,7 +1885,8 @@ not_interesting_stmt (gimple stmt)
loop, we would have already failed the number of exits tests. */
if (gimple_code (stmt) == GIMPLE_LABEL
|| gimple_code (stmt) == GIMPLE_GOTO
- || gimple_code (stmt) == GIMPLE_COND)
+ || gimple_code (stmt) == GIMPLE_COND
+ || is_gimple_debug (stmt))
return true;
return false;
}
and while it is sufficient for this testcase, it is not sufficient say for
gfortran.dg/ltrans-7.f90 with
--target_board=unix/-fcompare-debug/-ftree-loop-linear and a bunch of other
testcases, that no longer die on -fcompare-debug failures, but with checking
ICEs.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42917
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2010-02-19 12:35 ` jakub at gcc dot gnu dot org
@ 2010-02-22 12:42 ` rguenth at gcc dot gnu dot org
2010-03-08 16:21 ` aldyh at gcc dot gnu dot org
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From: rguenth at gcc dot gnu dot org @ 2010-02-22 12:42 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from rguenth at gcc dot gnu dot org 2010-02-22 12:41 -------
Confirmed.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2010-02-22 12:41:57
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42917
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2010-02-22 12:42 ` rguenth at gcc dot gnu dot org
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2010-03-16 11:34 ` aldyh at gcc dot gnu dot org
2010-03-16 11:36 ` aldyh at gcc dot gnu dot org
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From: aldyh at gcc dot gnu dot org @ 2010-03-08 16:21 UTC (permalink / raw)
To: gcc-bugs
--
aldyh at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |aldyh at gcc dot gnu dot org
|dot org |
Status|NEW |ASSIGNED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42917
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2010-03-08 16:21 ` aldyh at gcc dot gnu dot org
@ 2010-03-16 11:34 ` aldyh at gcc dot gnu dot org
2010-03-16 11:36 ` aldyh at gcc dot gnu dot org
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From: aldyh at gcc dot gnu dot org @ 2010-03-16 11:34 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from aldyh at gcc dot gnu dot org 2010-03-16 11:34 -------
Subject: Bug 42917
Author: aldyh
Date: Tue Mar 16 11:33:45 2010
New Revision: 157477
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=157477
Log:
PR tree-optimization/42917
* lambda-code.c (remove_iv): Skip debug statements.
(lambda_loopnest_to_gcc_loopnest): Likewise.
(not_interesting_stmt): Debug statements are not interesting.
Added:
trunk/gcc/testsuite/gcc.dg/pr42917.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/lambda-code.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42917
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2010-03-16 11:34 ` aldyh at gcc dot gnu dot org
@ 2010-03-16 11:36 ` aldyh at gcc dot gnu dot org
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From: aldyh at gcc dot gnu dot org @ 2010-03-16 11:36 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from aldyh at gcc dot gnu dot org 2010-03-16 11:36 -------
Fixed here:
http://gcc.gnu.org/ml/gcc-patches/2010-03/msg00560.html
--
aldyh at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42917
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