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* [Bug target/20409] New: ICE in simplify_subreg with -fprofile-generate
@ 2005-03-10 16:21 jakub at gcc dot gnu dot org
2005-03-10 16:25 ` [Bug target/20409] " pinskia at gcc dot gnu dot org
0 siblings, 1 reply; 2+ messages in thread
From: jakub at gcc dot gnu dot org @ 2005-03-10 16:21 UTC (permalink / raw)
To: gcc-bugs
/* { dg-do compile } */
/* { dg-options "-O2 -fprofile-generate" } */
struct S
{
int a;
void **b;
};
void
foo (struct S *x, int y)
{
if (!x)
return;
if (y >= x->a)
return;
x->a--;
for (; y < x->a; y++)
x->b[y] = x->b[y + 1];
x->b[x->a] = (void *) 0;
}
ICEs on IA-64 during combine, but the bug is earlier.
CSE2 creates:
(insn 42 41 87 3 (set (reg/v:SI 344 [ y.8 ])
(reg:DI 378)) 4 {*movsi_internal} (nil)
(nil))
which is invalid because the modes don't match.
Before CSE2 there is:
(insn 100 99 101 0 (set (reg:DI 378)
(reg:DI 113 in1)) -1 (nil)
(nil))
...
(insn 103 102 104 0 (set (reg:DI 113 in1)
(reg:DI 378)) -1 (nil)
(nil))
...
(insn 12 11 13 0 (set (reg/v:SI 350 [ y ])
(reg:SI 113 in1 [ y ])) 4 {*movsi_internal} (nil)
(nil))
...
(insn 42 41 87 3 (set (reg/v:SI 344 [ y.8 ])
(reg/v:SI 350 [ y ])) 4 {*movsi_internal} (nil)
(nil))
where insns 100 and 103 and code around it are created by .bp pass.
--
Summary: ICE in simplify_subreg with -fprofile-generate
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Keywords: ice-on-valid-code
Severity: critical
Priority: P2
Component: target
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: jakub at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: ia64-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20409
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug target/20409] ICE in simplify_subreg with -fprofile-generate
2005-03-10 16:21 [Bug target/20409] New: ICE in simplify_subreg with -fprofile-generate jakub at gcc dot gnu dot org
@ 2005-03-10 16:25 ` pinskia at gcc dot gnu dot org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-03-10 16:25 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-03-10 16:24 -------
This is not a target bug but rather a bug in CSE.
This is a dup of bug 20249.
*** This bug has been marked as a duplicate of 20249 ***
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |DUPLICATE
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20409
^ permalink raw reply [flat|nested] 2+ messages in thread
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2005-03-10 16:21 [Bug target/20409] New: ICE in simplify_subreg with -fprofile-generate jakub at gcc dot gnu dot org
2005-03-10 16:25 ` [Bug target/20409] " pinskia at gcc dot gnu dot org
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