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* [Bug ada/50571] New: [4.6/4.7 Regression] Undesirable folding in "m" constrained asm operands
@ 2011-09-30 6:04 jakub at gcc dot gnu.org
2011-09-30 6:26 ` [Bug inline-asm/50571] " jakub at gcc dot gnu.org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-09-30 6:04 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50571
Bug #: 50571
Summary: [4.6/4.7 Regression] Undesirable folding in "m"
constrained asm operands
Classification: Unclassified
Product: gcc
Version: 4.6.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: ada
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: jakub@gcc.gnu.org
static const int var[4] = { 1, 2, 3, 4 };
void
foo (void)
{
__asm volatile ("" : : "m" (*(int *) var));
}
warns at -O2:
warning: use of memory input without lvalue in asm operand 0 is deprecated
[enabled by default]
although the source has there addressable memory. The problem is that
gimple-fold transformed this into "m" (1), which is deprecated.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug inline-asm/50571] [4.6/4.7 Regression] Undesirable folding in "m" constrained asm operands
2011-09-30 6:04 [Bug ada/50571] New: [4.6/4.7 Regression] Undesirable folding in "m" constrained asm operands jakub at gcc dot gnu.org
@ 2011-09-30 6:26 ` jakub at gcc dot gnu.org
2011-09-30 6:55 ` jakub at gcc dot gnu.org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-09-30 6:26 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50571
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2011-09-30
Component|ada |inline-asm
Known to work| |4.5.1
AssignedTo|unassigned at gcc dot |jakub at gcc dot gnu.org
|gnu.org |
Target Milestone|--- |4.6.2
Ever Confirmed|0 |1
Known to fail| |4.6.1, 4.7.0
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug inline-asm/50571] [4.6/4.7 Regression] Undesirable folding in "m" constrained asm operands
2011-09-30 6:04 [Bug ada/50571] New: [4.6/4.7 Regression] Undesirable folding in "m" constrained asm operands jakub at gcc dot gnu.org
2011-09-30 6:26 ` [Bug inline-asm/50571] " jakub at gcc dot gnu.org
@ 2011-09-30 6:55 ` jakub at gcc dot gnu.org
2011-09-30 15:23 ` jakub at gcc dot gnu.org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-09-30 6:55 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50571
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-09-30 06:03:43 UTC ---
Created attachment 25387
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25387
gcc47-pr50571.patch
Fix.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug inline-asm/50571] [4.6/4.7 Regression] Undesirable folding in "m" constrained asm operands
2011-09-30 6:04 [Bug ada/50571] New: [4.6/4.7 Regression] Undesirable folding in "m" constrained asm operands jakub at gcc dot gnu.org
2011-09-30 6:26 ` [Bug inline-asm/50571] " jakub at gcc dot gnu.org
2011-09-30 6:55 ` jakub at gcc dot gnu.org
@ 2011-09-30 15:23 ` jakub at gcc dot gnu.org
2011-09-30 18:38 ` jakub at gcc dot gnu.org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-09-30 15:23 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50571
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-09-30 15:01:31 UTC ---
Author: jakub
Date: Fri Sep 30 15:01:27 2011
New Revision: 179389
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=179389
Log:
PR inline-asm/50571
* gimple-fold.c (fold_stmt_1) <case GIMPLE_ASM>: If
input constraints allow mem and not reg, pass true instead of
false as second argument to maybe_fold_reference.
* gcc.dg/pr50571.c: New test.
Added:
trunk/gcc/testsuite/gcc.dg/pr50571.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple-fold.c
trunk/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug inline-asm/50571] [4.6/4.7 Regression] Undesirable folding in "m" constrained asm operands
2011-09-30 6:04 [Bug ada/50571] New: [4.6/4.7 Regression] Undesirable folding in "m" constrained asm operands jakub at gcc dot gnu.org
` (2 preceding siblings ...)
2011-09-30 15:23 ` jakub at gcc dot gnu.org
@ 2011-09-30 18:38 ` jakub at gcc dot gnu.org
2011-09-30 20:12 ` jakub at gcc dot gnu.org
2012-06-12 2:45 ` amker at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-09-30 18:38 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50571
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-09-30 18:14:38 UTC ---
Author: jakub
Date: Fri Sep 30 18:14:33 2011
New Revision: 179402
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=179402
Log:
PR inline-asm/50571
* gimple-fold.c (fold_stmt_1) <case GIMPLE_ASM>: If
input constraints allow mem and not reg, pass true instead of
false as second argument to maybe_fold_reference.
* gcc.dg/pr50571.c: New test.
Added:
branches/gcc-4_6-branch/gcc/testsuite/gcc.dg/pr50571.c
Modified:
branches/gcc-4_6-branch/gcc/ChangeLog
branches/gcc-4_6-branch/gcc/gimple-fold.c
branches/gcc-4_6-branch/gcc/testsuite/ChangeLog
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug inline-asm/50571] [4.6/4.7 Regression] Undesirable folding in "m" constrained asm operands
2011-09-30 6:04 [Bug ada/50571] New: [4.6/4.7 Regression] Undesirable folding in "m" constrained asm operands jakub at gcc dot gnu.org
` (3 preceding siblings ...)
2011-09-30 18:38 ` jakub at gcc dot gnu.org
@ 2011-09-30 20:12 ` jakub at gcc dot gnu.org
2012-06-12 2:45 ` amker at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu.org @ 2011-09-30 20:12 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50571
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-09-30 18:55:11 UTC ---
Fixed.
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug inline-asm/50571] [4.6/4.7 Regression] Undesirable folding in "m" constrained asm operands
2011-09-30 6:04 [Bug ada/50571] New: [4.6/4.7 Regression] Undesirable folding in "m" constrained asm operands jakub at gcc dot gnu.org
` (4 preceding siblings ...)
2011-09-30 20:12 ` jakub at gcc dot gnu.org
@ 2012-06-12 2:45 ` amker at gcc dot gnu.org
5 siblings, 0 replies; 7+ messages in thread
From: amker at gcc dot gnu.org @ 2012-06-12 2:45 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50571
--- Comment #5 from amker at gcc dot gnu.org 2012-06-12 02:45:27 UTC ---
Author: amker
Date: Tue Jun 12 02:45:23 2012
New Revision: 188415
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=188415
Log:
Backport r179389 from mainline
2011-09-30 Jakub Jelinek <jakub@redhat.com>
PR inline-asm/50571
* gimple-fold.c (fold_stmt_1) <case GIMPLE_ASM>: If
input constraints allow mem and not reg, pass true instead of
false as second argument to maybe_fold_reference.
* gcc.dg/pr50571.c: New test.
Added:
branches/ARM/embedded-4_6-branch/gcc/testsuite/gcc.dg/pr50571.c
Modified:
branches/ARM/embedded-4_6-branch/gcc/ChangeLog.arm
branches/ARM/embedded-4_6-branch/gcc/gimple-fold.c
branches/ARM/embedded-4_6-branch/gcc/testsuite/ChangeLog.arm
^ permalink raw reply [flat|nested] 7+ messages in thread
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2011-09-30 6:04 [Bug ada/50571] New: [4.6/4.7 Regression] Undesirable folding in "m" constrained asm operands jakub at gcc dot gnu.org
2011-09-30 6:26 ` [Bug inline-asm/50571] " jakub at gcc dot gnu.org
2011-09-30 6:55 ` jakub at gcc dot gnu.org
2011-09-30 15:23 ` jakub at gcc dot gnu.org
2011-09-30 18:38 ` jakub at gcc dot gnu.org
2011-09-30 20:12 ` jakub at gcc dot gnu.org
2012-06-12 2:45 ` amker at gcc dot gnu.org
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