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* [Bug c/44031] New: ice in subst_reloads, at reload.c:6327
@ 2010-05-07 21:03 regehr at cs dot utah dot edu
2010-05-07 21:18 ` [Bug target/44031] [4.6 Regression] " rguenth at gcc dot gnu dot org
` (7 more replies)
0 siblings, 8 replies; 9+ messages in thread
From: regehr at cs dot utah dot edu @ 2010-05-07 21:03 UTC (permalink / raw)
To: gcc-bugs
[regehr@bethe tmp600]$ current-gcc -v
Using built-in specs.
COLLECT_GCC=current-gcc
COLLECT_LTO_WRAPPER=/uusoc/exports/scratch/regehr/z/compiler-install/gcc-r159144-install/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../configure --with-libelf=/usr/local --enable-lto
--prefix=/home/regehr/z/compiler-install/gcc-r159144-install
--program-prefix=r159144- --enable-languages=c,c++
Thread model: posix
gcc version 4.6.0 20100507 (experimental) (GCC)
[regehr@bethe tmp600]$ current-gcc -O -c small.c
small.c: In function 'int321':
small.c:35:1: internal compiler error: in subst_reloads, at reload.c:6327
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
[regehr@bethe tmp600]$ cat small.c
typedef unsigned char uint8_t;
typedef unsigned int uint32_t;
typedef unsigned long int uint64_t;
static uint32_t
safe_add_func_uint32_t_u_u (uint32_t ui1, uint32_t ui2)
{
return ui1 + ui2;
}
static uint64_t
safe_div_func_uint64_t_u_u (uint64_t ui1, uint32_t ui2)
{
return ui2 ? : (ui1 / ui2);
}
uint8_t g_55;
uint8_t *g_73 = &g_55;
uint8_t **g_332 = &g_73;
int func_38(uint8_t *,int);
int func_8(int);
int int321 (void)
{
uint8_t l_26[4];
uint8_t *l_238 = &l_26[2];
uint8_t l_400;
l_400 &=
func_38 (&l_26[3],
safe_add_func_uint32_t_u_u (safe_div_func_uint64_t_u_u
(1, **g_332),
*l_238) >= *l_238 < func_8 (0)), 1;
return 0;
}
--
Summary: ice in subst_reloads, at reload.c:6327
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: regehr at cs dot utah dot edu
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44031
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug target/44031] [4.6 Regression] ice in subst_reloads, at reload.c:6327
2010-05-07 21:03 [Bug c/44031] New: ice in subst_reloads, at reload.c:6327 regehr at cs dot utah dot edu
@ 2010-05-07 21:18 ` rguenth at gcc dot gnu dot org
2010-05-08 0:36 ` [Bug target/44031] [4.4/4.5/4.6 " hjl dot tools at gmail dot com
` (6 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-05-07 21:18 UTC (permalink / raw)
To: gcc-bugs
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|ice in subst_reloads, at |[4.6 Regression] ice in
|reload.c:6327 |subst_reloads, at
| |reload.c:6327
Target Milestone|--- |4.6.0
Version|unknown |4.6.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44031
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug target/44031] [4.4/4.5/4.6 Regression] ice in subst_reloads, at reload.c:6327
2010-05-07 21:03 [Bug c/44031] New: ice in subst_reloads, at reload.c:6327 regehr at cs dot utah dot edu
2010-05-07 21:18 ` [Bug target/44031] [4.6 Regression] " rguenth at gcc dot gnu dot org
@ 2010-05-08 0:36 ` hjl dot tools at gmail dot com
2010-05-08 0:40 ` hjl dot tools at gmail dot com
` (5 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: hjl dot tools at gmail dot com @ 2010-05-08 0:36 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from hjl dot tools at gmail dot com 2010-05-08 00:35 -------
It failed with gcc 4.4.3 and 4.5.0.
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2010-05-08 00:35:54
date| |
Summary|[4.6 Regression] ice in |[4.4/4.5/4.6 Regression] ice
|subst_reloads, at |in subst_reloads, at
|reload.c:6327 |reload.c:6327
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44031
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug target/44031] [4.4/4.5/4.6 Regression] ice in subst_reloads, at reload.c:6327
2010-05-07 21:03 [Bug c/44031] New: ice in subst_reloads, at reload.c:6327 regehr at cs dot utah dot edu
2010-05-07 21:18 ` [Bug target/44031] [4.6 Regression] " rguenth at gcc dot gnu dot org
2010-05-08 0:36 ` [Bug target/44031] [4.4/4.5/4.6 " hjl dot tools at gmail dot com
@ 2010-05-08 0:40 ` hjl dot tools at gmail dot com
2010-05-10 15:22 ` vmakarov at redhat dot com
` (4 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: hjl dot tools at gmail dot com @ 2010-05-08 0:40 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from hjl dot tools at gmail dot com 2010-05-08 00:40 -------
It is caused by revision 152533:
http://gcc.gnu.org/ml/gcc-cvs/2009-10/msg00182.html
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ubizjak at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44031
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug target/44031] [4.4/4.5/4.6 Regression] ice in subst_reloads, at reload.c:6327
2010-05-07 21:03 [Bug c/44031] New: ice in subst_reloads, at reload.c:6327 regehr at cs dot utah dot edu
` (2 preceding siblings ...)
2010-05-08 0:40 ` hjl dot tools at gmail dot com
@ 2010-05-10 15:22 ` vmakarov at redhat dot com
2010-05-11 5:31 ` law at redhat dot com
` (3 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: vmakarov at redhat dot com @ 2010-05-10 15:22 UTC (permalink / raw)
To: gcc-bugs
------- Comment #3 from vmakarov at redhat dot com 2010-05-10 15:22 -------
> It is caused by revision 152533:
>
> http://gcc.gnu.org/ml/gcc-cvs/2009-10/msg00182.html
>
If it is so, the patch triggered some reload bug IMO. The patch itself was
very safe because it resulted in creation of additional conflicts.
I hope that Jeff Law's work on new reload will fix it when it is in 4.6
finally. Otherwise, we should work on this PR.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44031
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug target/44031] [4.4/4.5/4.6 Regression] ice in subst_reloads, at reload.c:6327
2010-05-07 21:03 [Bug c/44031] New: ice in subst_reloads, at reload.c:6327 regehr at cs dot utah dot edu
` (3 preceding siblings ...)
2010-05-10 15:22 ` vmakarov at redhat dot com
@ 2010-05-11 5:31 ` law at redhat dot com
2010-07-25 18:07 ` ubizjak at gmail dot com
` (2 subsequent siblings)
7 siblings, 0 replies; 9+ messages in thread
From: law at redhat dot com @ 2010-05-11 5:31 UTC (permalink / raw)
To: gcc-bugs
------- Comment #4 from law at redhat dot com 2010-05-11 05:31 -------
I doubt my work will make a significant difference for this test.
We're trying to reload an insn which matches:
(define_insn "*add<mode>3_cconly_overflow"
[(set (reg:CCC FLAGS_REG)
(compare:CCC
(plus:SWI
(match_operand:SWI 1 "nonimmediate_operand" "%0")
(match_operand:SWI 2 "<general_operand>" "<r><i>m"))
(match_dup 1)))
(clobber (match_scratch:SWI 0 "=<r>"))]
"ix86_binary_operator_ok (PLUS, <MODE>mode, operands)"
"add{<imodesuffix>}\t{%2, %0|%0, %2}"
[(set_attr "type" "alu")
(set_attr "mode" "<MODE>")])
(gdb) p debug_reload()
Reload 0: reload_in (SI) = (reg:SI 6 bp)
reload_out (SI) = (scratch:SI)
GENERAL_REGS, RELOAD_OTHER (opnum = 0), can't combine
reload_in_reg: (subreg:SI (reg:DI 6 bp [orig:66 D.2764 ] [66]) 0)
reload_out_reg: (scratch:SI)
$14 = void
(gdb) p debug_rtx (insn)
(insn 25 24 26 5 j.c:26 (parallel [
(set (reg:CCC 17 flags)
(compare:CCC (plus:SI (subreg:SI (reg:DI 6 bp [orig:66 D.2764 ]
[66]) 0)
(reg:SI 3 bx [orig:58 D.2737 ] [58]))
(subreg:SI (reg:DI 6 bp [orig:66 D.2764 ] [66]) 0)))
(clobber (scratch:SI))
]) 316 {*addsi3_cconly_overflow} (expr_list:REG_DEAD (reg:DI 6 bp
[orig:66 D.2764 ] [66])
(expr_list:REG_DEAD (reg:SI 3 bx [orig:58 D.2737 ] [58])
(nil))))
I think the only way to satisfy this reload is to allocate the scratch to
(subreg: SI (reg:DI 6)) I have no clue why reload doesn't do that.
--
law at redhat dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |law at redhat dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44031
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug target/44031] [4.4/4.5/4.6 Regression] ice in subst_reloads, at reload.c:6327
2010-05-07 21:03 [Bug c/44031] New: ice in subst_reloads, at reload.c:6327 regehr at cs dot utah dot edu
` (4 preceding siblings ...)
2010-05-11 5:31 ` law at redhat dot com
@ 2010-07-25 18:07 ` ubizjak at gmail dot com
2010-08-01 11:41 ` ubizjak at gmail dot com
2010-09-02 10:46 ` rguenth at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: ubizjak at gmail dot com @ 2010-07-25 18:07 UTC (permalink / raw)
To: gcc-bugs
------- Comment #5 from ubizjak at gmail dot com 2010-07-25 18:06 -------
*** Bug 44816 has been marked as a duplicate of this bug. ***
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44031
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug target/44031] [4.4/4.5/4.6 Regression] ice in subst_reloads, at reload.c:6327
2010-05-07 21:03 [Bug c/44031] New: ice in subst_reloads, at reload.c:6327 regehr at cs dot utah dot edu
` (5 preceding siblings ...)
2010-07-25 18:07 ` ubizjak at gmail dot com
@ 2010-08-01 11:41 ` ubizjak at gmail dot com
2010-09-02 10:46 ` rguenth at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: ubizjak at gmail dot com @ 2010-08-01 11:41 UTC (permalink / raw)
To: gcc-bugs
------- Comment #6 from ubizjak at gmail dot com 2010-08-01 11:41 -------
FYI, following shoot-in-the-dark patch didn't help, but I guess it is needed
together with some further reload surgery:
Index: gensupport.c
===================================================================
--- gensupport.c (revision 162794)
+++ gensupport.c (working copy)
@@ -1050,7 +1050,7 @@ static const struct std_pred_table std_p
{"address_operand", true, true, {SUBREG, REG, MEM, PLUS, MINUS, MULT}},
{"register_operand", false, false, {SUBREG, REG}},
{"pmode_register_operand", true, false, {SUBREG, REG}},
- {"scratch_operand", false, false, {SCRATCH, REG}},
+ {"scratch_operand", false, false, {SCRATCH, SUBREG, REG}},
{"immediate_operand", false, true, {UNKNOWN}},
{"const_int_operand", false, false, {CONST_INT}},
{"const_double_operand", false, false, {CONST_INT, CONST_DOUBLE}},
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44031
^ permalink raw reply [flat|nested] 9+ messages in thread
* [Bug target/44031] [4.4/4.5/4.6 Regression] ice in subst_reloads, at reload.c:6327
2010-05-07 21:03 [Bug c/44031] New: ice in subst_reloads, at reload.c:6327 regehr at cs dot utah dot edu
` (6 preceding siblings ...)
2010-08-01 11:41 ` ubizjak at gmail dot com
@ 2010-09-02 10:46 ` rguenth at gcc dot gnu dot org
7 siblings, 0 replies; 9+ messages in thread
From: rguenth at gcc dot gnu dot org @ 2010-09-02 10:46 UTC (permalink / raw)
To: gcc-bugs
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44031
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2010-09-02 10:46 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
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2010-05-07 21:03 [Bug c/44031] New: ice in subst_reloads, at reload.c:6327 regehr at cs dot utah dot edu
2010-05-07 21:18 ` [Bug target/44031] [4.6 Regression] " rguenth at gcc dot gnu dot org
2010-05-08 0:36 ` [Bug target/44031] [4.4/4.5/4.6 " hjl dot tools at gmail dot com
2010-05-08 0:40 ` hjl dot tools at gmail dot com
2010-05-10 15:22 ` vmakarov at redhat dot com
2010-05-11 5:31 ` law at redhat dot com
2010-07-25 18:07 ` ubizjak at gmail dot com
2010-08-01 11:41 ` ubizjak at gmail dot com
2010-09-02 10:46 ` rguenth at gcc dot gnu dot org
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