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* [Bug middle-end/19454] New: bad code generated with gcc.c-torture/execute/bf64-1.c at -O1
@ 2005-01-15 0:50 sje at cup dot hp dot com
2005-01-15 1:42 ` [Bug middle-end/19454] [4.0 Regression] " pinskia at gcc dot gnu dot org
` (8 more replies)
0 siblings, 9 replies; 10+ messages in thread
From: sje at cup dot hp dot com @ 2005-01-15 0:50 UTC (permalink / raw)
To: gcc-bugs
Here is a slightly modified version of bf64-1.c with print statments:
struct tmp
{
long long int pad : 12;
long long int field : 52;
};
struct tmp2
{
long long int field : 52;
long long int pad : 12;
};
struct tmp sub (struct tmp xtmp);
struct tmp2 sub2 (struct tmp2 xtmp2);
struct tmp
sub (struct tmp xtmp)
{
xtmp.field |= 0x0008765412345678LL;
return xtmp;
}
struct tmp2
sub2 (struct tmp2 xtmp2)
{
xtmp2.field |= 0x0008765412345678LL;
return xtmp2;
}
main()
{
struct tmp xtmp = {0x123, 0xFFF000FFF000FLL};
struct tmp2 xtmp2 = {0xFFF000FFF000FLL, 0x123};
xtmp = sub (xtmp);
xtmp2 = sub2 (xtmp2);
printf("%lld\n", xtmp.pad);
printf("%lld\n", xtmp.field);
printf("%lld\n", xtmp2.pad);
printf("%lld\n", xtmp2.field);
exit (0);
}
With -O0 it prints:
291
-738197547393
291
-738197547393
At -O1 it prints:
291
1479942473249059
291
-738197547393
This bug happens on IA64 HP-UX (with -O1 and in 32 or 64 bit mode) but not on
IA64 Linux. I tracked the start of failure to the following patch but was
unable to figure out what the exact problem is.
2004-09-03 Richard Henderson <rth@redhat.com>
PR middle-end/9997
* cfgexpand.c (LOCAL_ALIGNMENT): Provide default.
(STACK_ALIGNMENT_NEEDED, FRAME_GROWS_DOWNWARD): Likewise.
(struct stack_var, EOC, stack_vars, stack_vars_alloc, stack_vars_num,
stack_vars_sorted, stack_vars_conflict, stack_vars_conflict_alloc,
frame_phase, get_decl_align_unit, add_stack_var, triangular_index,
resize_stack_vars_conflict, add_stack_var_conflict,
stack_var_conflict_p, add_alias_set_conflicts, stack_var_size_cmp,
union_stack_vars, partition_stack_vars, dump_stack_var_partition,
expand_one_stack_var_at, expand_stack_vars, expand_one_stack_var,
expand_one_static_var, expand_one_hard_reg_var,
expand_one_register_var, expand_one_error_var, defer_stack_allocation,
expand_one_var, expand_used_vars_for_block, clear_tree_used): New.
(expand_used_vars): Rewrite.
* Makefile.in (cfgexpand.o): Update dependencies.
--
Summary: bad code generated with gcc.c-torture/execute/bf64-1.c
at -O1
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: sje at cup dot hp dot com
CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: ia64-hp-hpux11.20
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19454
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/19454] [4.0 Regression] bad code generated with gcc.c-torture/execute/bf64-1.c at -O1
2005-01-15 0:50 [Bug middle-end/19454] New: bad code generated with gcc.c-torture/execute/bf64-1.c at -O1 sje at cup dot hp dot com
@ 2005-01-15 1:42 ` pinskia at gcc dot gnu dot org
2005-02-01 18:44 ` pinskia at gcc dot gnu dot org
` (7 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-01-15 1:42 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |rth at gcc dot gnu dot org
Keywords| |wrong-code
Summary|bad code generated with |[4.0 Regression] bad code
|gcc.c-torture/execute/bf64- |generated with gcc.c-
|1.c at -O1 |torture/execute/bf64-1.c at
| |-O1
Target Milestone|--- |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19454
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/19454] [4.0 Regression] bad code generated with gcc.c-torture/execute/bf64-1.c at -O1
2005-01-15 0:50 [Bug middle-end/19454] New: bad code generated with gcc.c-torture/execute/bf64-1.c at -O1 sje at cup dot hp dot com
2005-01-15 1:42 ` [Bug middle-end/19454] [4.0 Regression] " pinskia at gcc dot gnu dot org
@ 2005-02-01 18:44 ` pinskia at gcc dot gnu dot org
2005-03-05 19:57 ` [Bug middle-end/19454] [4.0/4.1 " pinskia at gcc dot gnu dot org
` (6 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-02-01 18:44 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-02-01 18:43 -------
Removing target milestone per: <http://gcc.gnu.org/ml/gcc/2005-01/msg01255.html> as it is known
to not to effect primary/secondary targets.
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.0.0 |---
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19454
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/19454] [4.0/4.1 Regression] bad code generated with gcc.c-torture/execute/bf64-1.c at -O1
2005-01-15 0:50 [Bug middle-end/19454] New: bad code generated with gcc.c-torture/execute/bf64-1.c at -O1 sje at cup dot hp dot com
2005-01-15 1:42 ` [Bug middle-end/19454] [4.0 Regression] " pinskia at gcc dot gnu dot org
2005-02-01 18:44 ` pinskia at gcc dot gnu dot org
@ 2005-03-05 19:57 ` pinskia at gcc dot gnu dot org
2005-03-20 2:53 ` [Bug middle-end/19454] [4.0 " jsm28 at gcc dot gnu dot org
` (5 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-03-05 19:57 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.1.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19454
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/19454] [4.0 Regression] bad code generated with gcc.c-torture/execute/bf64-1.c at -O1
2005-01-15 0:50 [Bug middle-end/19454] New: bad code generated with gcc.c-torture/execute/bf64-1.c at -O1 sje at cup dot hp dot com
` (2 preceding siblings ...)
2005-03-05 19:57 ` [Bug middle-end/19454] [4.0/4.1 " pinskia at gcc dot gnu dot org
@ 2005-03-20 2:53 ` jsm28 at gcc dot gnu dot org
2005-03-21 14:24 ` bonzini at gcc dot gnu dot org
` (4 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: jsm28 at gcc dot gnu dot org @ 2005-03-20 2:53 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From jsm28 at gcc dot gnu dot org 2005-03-20 02:53 -------
These test failures are fixed on mainline by:
2005-03-01 Paolo Bonzini <bonzini@gnu.org>
* combine.c (gen_binary): Remove.
(known_cond, simplify_shift_const, find_split_point,
combine_simplify_rtx, simplify_if_then_else, simplify_set,
simplify_logical, expand_field_assignment, extract_left_shift,
force_to_mode, if_then_else_cond, apply_distributive_law,
simplify_and_const_int, simplify_shift_const, gen_lowpart_for_combine,
simplify_comparison, reversed_comparison): Replace with
simplify_gen_binary, simplify_gen_relational or
distribute_and_simplify_rtx.
(distribute_and_simplify_rtx): New function.
I haven't yet tested this patch with 4.0 branch to see if it fixes them there.
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |bonzini at gcc dot gnu dot
| |org, jsm28 at gcc dot gnu
| |dot org
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2005-03-20 02:53:07
date| |
Summary|[4.0/4.1 Regression] bad |[4.0 Regression] bad code
|code generated with gcc.c- |generated with gcc.c-
|torture/execute/bf64-1.c at |torture/execute/bf64-1.c at
|-O1 |-O1
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19454
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/19454] [4.0 Regression] bad code generated with gcc.c-torture/execute/bf64-1.c at -O1
2005-01-15 0:50 [Bug middle-end/19454] New: bad code generated with gcc.c-torture/execute/bf64-1.c at -O1 sje at cup dot hp dot com
` (3 preceding siblings ...)
2005-03-20 2:53 ` [Bug middle-end/19454] [4.0 " jsm28 at gcc dot gnu dot org
@ 2005-03-21 14:24 ` bonzini at gcc dot gnu dot org
2005-03-24 17:44 ` bonzini at gcc dot gnu dot org
` (3 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: bonzini at gcc dot gnu dot org @ 2005-03-21 14:24 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From bonzini at gcc dot gnu dot org 2005-03-21 14:23 -------
I'm looking into why the patch fixes the change
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19454
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/19454] [4.0 Regression] bad code generated with gcc.c-torture/execute/bf64-1.c at -O1
2005-01-15 0:50 [Bug middle-end/19454] New: bad code generated with gcc.c-torture/execute/bf64-1.c at -O1 sje at cup dot hp dot com
` (4 preceding siblings ...)
2005-03-21 14:24 ` bonzini at gcc dot gnu dot org
@ 2005-03-24 17:44 ` bonzini at gcc dot gnu dot org
2005-04-01 8:25 ` bonzini at gcc dot gnu dot org
` (2 subsequent siblings)
8 siblings, 0 replies; 10+ messages in thread
From: bonzini at gcc dot gnu dot org @ 2005-03-24 17:44 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From bonzini at gcc dot gnu dot org 2005-03-24 17:44 -------
Added PR20600, since the patch causes that regression. Both patches were
approved for 4.0 once the PR20600 patch is approved into mainline.
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |bonzini at gcc dot gnu dot
|dot org |org
Status|NEW |ASSIGNED
Last reconfirmed|2005-03-20 02:53:07 |2005-03-24 17:44:51
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19454
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/19454] [4.0 Regression] bad code generated with gcc.c-torture/execute/bf64-1.c at -O1
2005-01-15 0:50 [Bug middle-end/19454] New: bad code generated with gcc.c-torture/execute/bf64-1.c at -O1 sje at cup dot hp dot com
` (5 preceding siblings ...)
2005-03-24 17:44 ` bonzini at gcc dot gnu dot org
@ 2005-04-01 8:25 ` bonzini at gcc dot gnu dot org
2005-04-01 11:23 ` cvs-commit at gcc dot gnu dot org
2005-04-04 10:29 ` jsm28 at gcc dot gnu dot org
8 siblings, 0 replies; 10+ messages in thread
From: bonzini at gcc dot gnu dot org @ 2005-04-01 8:25 UTC (permalink / raw)
To: gcc-bugs
--
Bug 19454 depends on bug 20600, which changed state.
Bug 20600 Summary: [4.1 regression] failure for pass.c on x86_64-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20600
What |Old Value |New Value
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19454
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/19454] [4.0 Regression] bad code generated with gcc.c-torture/execute/bf64-1.c at -O1
2005-01-15 0:50 [Bug middle-end/19454] New: bad code generated with gcc.c-torture/execute/bf64-1.c at -O1 sje at cup dot hp dot com
` (6 preceding siblings ...)
2005-04-01 8:25 ` bonzini at gcc dot gnu dot org
@ 2005-04-01 11:23 ` cvs-commit at gcc dot gnu dot org
2005-04-04 10:29 ` jsm28 at gcc dot gnu dot org
8 siblings, 0 replies; 10+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2005-04-01 11:23 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-04-01 11:23 -------
Subject: Bug 19454
CVSROOT: /cvs/gcc
Module name: gcc
Branch: gcc-4_0-branch
Changes by: bonzini@gcc.gnu.org 2005-04-01 11:23:08
Modified files:
gcc : ChangeLog combine.c
gcc/config/i386: i386.c
Log message:
2005-04-01 Paolo Bonzini <bonzini@gnu.org>
PR middle-end/19454
PR rtl-optimization/20600
* combine.c (gen_binary): Remove.
(known_cond, simplify_shift_const, find_split_point,
combine_simplify_rtx, simplify_if_then_else, simplify_set,
simplify_logical, expand_field_assignment, extract_left_shift,
force_to_mode, if_then_else_cond, apply_distributive_law,
simplify_and_const_int, simplify_shift_const, gen_lowpart_for_combine,
simplify_comparison, reversed_comparison): Replace with
simplify_gen_binary, simplify_gen_relational or
distribute_and_simplify_rtx.
(distribute_and_simplify_rtx): New function.
* config/i386/i386.c (ix86_decompose_address): Look inside SUBREGs
to fix addresses involving EBP and ESP.
(aligned_operand, legitimate_address_p, ix86_address_cost): Be prepared
for SUBREGed registers.
(legitimate_address_p): Accept SUBREGed registers.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=2.7592.2.107&r2=2.7592.2.108
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/combine.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.475.4.1&r2=1.475.4.2
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/config/i386/i386.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.795.6.1&r2=1.795.6.2
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19454
^ permalink raw reply [flat|nested] 10+ messages in thread
* [Bug middle-end/19454] [4.0 Regression] bad code generated with gcc.c-torture/execute/bf64-1.c at -O1
2005-01-15 0:50 [Bug middle-end/19454] New: bad code generated with gcc.c-torture/execute/bf64-1.c at -O1 sje at cup dot hp dot com
` (7 preceding siblings ...)
2005-04-01 11:23 ` cvs-commit at gcc dot gnu dot org
@ 2005-04-04 10:29 ` jsm28 at gcc dot gnu dot org
8 siblings, 0 replies; 10+ messages in thread
From: jsm28 at gcc dot gnu dot org @ 2005-04-04 10:29 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From jsm28 at gcc dot gnu dot org 2005-04-04 10:29 -------
Test now passes on 4.0 branch as well as mainline after patch was applied.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
Target Milestone|4.1.0 |4.0.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19454
^ permalink raw reply [flat|nested] 10+ messages in thread
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2005-01-15 0:50 [Bug middle-end/19454] New: bad code generated with gcc.c-torture/execute/bf64-1.c at -O1 sje at cup dot hp dot com
2005-01-15 1:42 ` [Bug middle-end/19454] [4.0 Regression] " pinskia at gcc dot gnu dot org
2005-02-01 18:44 ` pinskia at gcc dot gnu dot org
2005-03-05 19:57 ` [Bug middle-end/19454] [4.0/4.1 " pinskia at gcc dot gnu dot org
2005-03-20 2:53 ` [Bug middle-end/19454] [4.0 " jsm28 at gcc dot gnu dot org
2005-03-21 14:24 ` bonzini at gcc dot gnu dot org
2005-03-24 17:44 ` bonzini at gcc dot gnu dot org
2005-04-01 8:25 ` bonzini at gcc dot gnu dot org
2005-04-01 11:23 ` cvs-commit at gcc dot gnu dot org
2005-04-04 10:29 ` jsm28 at gcc dot gnu dot org
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