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* [Bug middle-end/40154] New: internal compiler error: in do_SUBST, at combine.c:681
@ 2009-05-15 2:21 rmansfield at qnx dot com
2009-05-16 0:08 ` [Bug middle-end/40154] [4.4/4.5 Regression] " kkojima at gcc dot gnu dot org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: rmansfield at qnx dot com @ 2009-05-15 2:21 UTC (permalink / raw)
To: gcc-bugs
ryan@ryan:~/gcc/trunk/gcc/build/gcc$ ./xgcc -v
Using built-in specs.
Target: sh4-unknown-linux-gnu
Configured with: ../configure --build=i486-build_pc-linux-gnu
--host=i486-build_pc-linux-gnu --target=sh4-unknown-linux-gnu
--prefix=/home/ryan/crosstool-ng-1.3.1/targets/sh4-unknown-linux-gnu/build/gcc-core-static
--with-local-prefix=/home/ryan/x-tools/sh4-unknown-linux-gnu/sh4-unknown-linux-gnu/sys-root
--disable-multilib
--with-sysroot=/home/ryan/x-tools/sh4-unknown-linux-gnu/sh4-unknown-linux-gnu/sys-root
--with-newlib --enable-threads=no --disable-shared --enable-__cxa_atexit
--disable-nls --enable-symvers=gnu --enable-languages=c
--enable-target-optspace
Thread model: single
gcc version 4.5.0 20090515 (experimental) [trunk revision 147550] (GCC)
$ cat ~/ice.i
char buf[20];
int main() {
long long int t = 50;
strcpy(buf, "hello world");
t *= 1000000000;
for(;;)
foo(&t);
}
ryan@ryan:~/gcc/trunk/gcc/build/gcc$ ./xgcc -B. -O ~/ice.i
/home/ryan/ice.i: In function 'main':
/home/ryan/ice.i:5: warning: incompatible implicit declaration of built-in
function 'strcpy'
/home/ryan/ice.i:9: internal compiler error: in do_SUBST, at combine.c:681
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
Works in gcc 4.3.3. Fails in gcc 4.4.0 and trunk (4.5.0 20090515)
--
Summary: internal compiler error: in do_SUBST, at combine.c:681
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: rmansfield at qnx dot com
GCC build triplet: i486-build_pc-linux-gnu
GCC host triplet: i486-build_pc-linux-gnu
GCC target triplet: sh4-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40154
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/40154] [4.4/4.5 Regression] internal compiler error: in do_SUBST, at combine.c:681
2009-05-15 2:21 [Bug middle-end/40154] New: internal compiler error: in do_SUBST, at combine.c:681 rmansfield at qnx dot com
@ 2009-05-16 0:08 ` kkojima at gcc dot gnu dot org
2009-06-03 0:19 ` kkojima at gcc dot gnu dot org
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: kkojima at gcc dot gnu dot org @ 2009-05-16 0:08 UTC (permalink / raw)
To: gcc-bugs
------- Comment #1 from kkojima at gcc dot gnu dot org 2009-05-16 00:08 -------
I've tried to see what is going on with -da.
.expand rtl dump shows that t *= 1000000000 is compiled to
a sequence of insns and the last two insns are:
(insn 87 86 88 ice.i:6 (parallel [
(set (subreg:SI (reg:DI 220) 0)
(ashift:SI (subreg:SI (reg:DI 218) 0)
(const_int 9 [0x9])))
(clobber (scratch:SI))
]) -1 (expr_list:REG_EQUAL (mult:DI (reg:DI 169)
(const_int 1000000000 [0x3b9aca00]))
(nil)))
(insn 88 87 0 ice.i:6 (set (mem/c/i:DI (plus:SI (reg/f:SI 167)
(const_int 56 [0x38])) [0 t+0 S8 A32])
(reg:DI 220)) -1 (nil))
Then CSE pass folds the constant multiplication and replaces
the above insn 87 with
(insn 87 86 108 2 ice.i:6 (set (reg:SI 229)
(const_int -1539607552 [0xffffffffa43b7400])) 175 {movsi_ie}
(expr_list:REG_EQUAL (const_int 50000000000 [0xba43b7400])
(nil)))
and do_SUBST complains that SImode reg can't hold 50000000000
at the combine pass.
I guess that the REG_EQUAL note of the original insn 87 is
suspicious. It seems that the patch below avoids the problem,
though it may be completely wrong. I'll ask the middle-end
experts on the gcc list about this issue.
--- ORIG/trunk/gcc/expmed.c 2009-05-12 19:17:54.000000000 +0900
+++ trunk/gcc/expmed.c 2009-05-16 08:34:14.000000000 +0900
@@ -2958,7 +2958,7 @@ expand_mult_const (enum machine_mode mod
enum mult_variant variant)
{
HOST_WIDE_INT val_so_far;
- rtx insn, accum, tem;
+ rtx insn, accum, tem, set;
int opno;
enum machine_mode nmode;
@@ -3074,9 +3074,12 @@ expand_mult_const (enum machine_mode mod
}
insn = get_last_insn ();
- set_unique_reg_note (insn, REG_EQUAL,
- gen_rtx_MULT (nmode, tem,
- GEN_INT (val_so_far)));
+ set = single_set (insn);
+ if (set != 0
+ && GET_MODE (SET_DEST (set)) == nmode)
+ set_unique_reg_note (insn, REG_EQUAL,
+ gen_rtx_MULT (nmode, tem,
+ GEN_INT (val_so_far)));
}
if (variant == negate_variant)
--
kkojima at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |kkojima at gcc dot gnu dot
| |org
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Keywords| |ice-on-valid-code
Known to fail| |4.4.0 4.5.0
Known to work| |4.3.3
Priority|P3 |P4
Last reconfirmed|0000-00-00 00:00:00 |2009-05-16 00:08:06
date| |
Summary|internal compiler error: in |[4.4/4.5 Regression]
|do_SUBST, at combine.c:681 |internal compiler error: in
| |do_SUBST, at combine.c:681
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40154
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/40154] [4.4/4.5 Regression] internal compiler error: in do_SUBST, at combine.c:681
2009-05-15 2:21 [Bug middle-end/40154] New: internal compiler error: in do_SUBST, at combine.c:681 rmansfield at qnx dot com
2009-05-16 0:08 ` [Bug middle-end/40154] [4.4/4.5 Regression] " kkojima at gcc dot gnu dot org
@ 2009-06-03 0:19 ` kkojima at gcc dot gnu dot org
2009-07-15 7:31 ` steven at gcc dot gnu dot org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: kkojima at gcc dot gnu dot org @ 2009-06-03 0:19 UTC (permalink / raw)
To: gcc-bugs
------- Comment #2 from kkojima at gcc dot gnu dot org 2009-06-03 00:18 -------
Currently workarounded for SH with the patch applied as revision
148018 and 148106. It defines a new DImode arithmetic shift left
expander which generates SH's movdi_i insn as its last insn.
movdi_i is a DImode move insn and expand_mult_const will mark
it with the REG_EQUAL note in the problem.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40154
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/40154] [4.4/4.5 Regression] internal compiler error: in do_SUBST, at combine.c:681
2009-05-15 2:21 [Bug middle-end/40154] New: internal compiler error: in do_SUBST, at combine.c:681 rmansfield at qnx dot com
2009-05-16 0:08 ` [Bug middle-end/40154] [4.4/4.5 Regression] " kkojima at gcc dot gnu dot org
2009-06-03 0:19 ` kkojima at gcc dot gnu dot org
@ 2009-07-15 7:31 ` steven at gcc dot gnu dot org
2009-10-15 12:55 ` jakub at gcc dot gnu dot org
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: steven at gcc dot gnu dot org @ 2009-07-15 7:31 UTC (permalink / raw)
To: gcc-bugs
--
steven at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.4.2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40154
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/40154] [4.4/4.5 Regression] internal compiler error: in do_SUBST, at combine.c:681
2009-05-15 2:21 [Bug middle-end/40154] New: internal compiler error: in do_SUBST, at combine.c:681 rmansfield at qnx dot com
` (2 preceding siblings ...)
2009-07-15 7:31 ` steven at gcc dot gnu dot org
@ 2009-10-15 12:55 ` jakub at gcc dot gnu dot org
2010-01-21 13:18 ` jakub at gcc dot gnu dot org
2010-04-30 9:00 ` [Bug middle-end/40154] [4.4/4.5/4.6 " jakub at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu dot org @ 2009-10-15 12:55 UTC (permalink / raw)
To: gcc-bugs
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.4.2 |4.4.3
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40154
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/40154] [4.4/4.5 Regression] internal compiler error: in do_SUBST, at combine.c:681
2009-05-15 2:21 [Bug middle-end/40154] New: internal compiler error: in do_SUBST, at combine.c:681 rmansfield at qnx dot com
` (3 preceding siblings ...)
2009-10-15 12:55 ` jakub at gcc dot gnu dot org
@ 2010-01-21 13:18 ` jakub at gcc dot gnu dot org
2010-04-30 9:00 ` [Bug middle-end/40154] [4.4/4.5/4.6 " jakub at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu dot org @ 2010-01-21 13:18 UTC (permalink / raw)
To: gcc-bugs
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.4.3 |4.4.4
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40154
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Bug middle-end/40154] [4.4/4.5/4.6 Regression] internal compiler error: in do_SUBST, at combine.c:681
2009-05-15 2:21 [Bug middle-end/40154] New: internal compiler error: in do_SUBST, at combine.c:681 rmansfield at qnx dot com
` (4 preceding siblings ...)
2010-01-21 13:18 ` jakub at gcc dot gnu dot org
@ 2010-04-30 9:00 ` jakub at gcc dot gnu dot org
5 siblings, 0 replies; 7+ messages in thread
From: jakub at gcc dot gnu dot org @ 2010-04-30 9:00 UTC (permalink / raw)
To: gcc-bugs
--
jakub at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|4.4.4 |4.4.5
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40154
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2010-04-30 9:00 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2009-05-15 2:21 [Bug middle-end/40154] New: internal compiler error: in do_SUBST, at combine.c:681 rmansfield at qnx dot com
2009-05-16 0:08 ` [Bug middle-end/40154] [4.4/4.5 Regression] " kkojima at gcc dot gnu dot org
2009-06-03 0:19 ` kkojima at gcc dot gnu dot org
2009-07-15 7:31 ` steven at gcc dot gnu dot org
2009-10-15 12:55 ` jakub at gcc dot gnu dot org
2010-01-21 13:18 ` jakub at gcc dot gnu dot org
2010-04-30 9:00 ` [Bug middle-end/40154] [4.4/4.5/4.6 " jakub at gcc dot gnu dot org
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