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* [Bug c/111761] New: risc-v regression: COND_LEN_* incorrect fold/simplify in middle-end
@ 2023-10-10 14:30 juzhe.zhong at rivai dot ai
2023-10-10 17:47 ` [Bug c/111761] " pinskia at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: juzhe.zhong at rivai dot ai @ 2023-10-10 14:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111761
Bug ID: 111761
Summary: risc-v regression: COND_LEN_* incorrect fold/simplify
in middle-end
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: juzhe.zhong at rivai dot ai
Target Milestone: ---
FAIL: gcc.dg/vect/vect-cond-arith-2.c -flto -ffat-lto-objects scan-tree-dump
optimized " = \\.COND_(LEN_)?SUB"
FAIL: gcc.dg/vect/vect-cond-arith-2.c scan-tree-dump optimized " =
\\.COND_(LEN_)?SUB"
https://godbolt.org/z/hEz51qf6a
double __GIMPLE (ssa, startwith("loop"))
neg_xi (double *x)
{
int i;
long unsigned int index;
long unsigned int offset;
double * xi_ptr;
double xi;
double neg_xi;
double res;
unsigned int ivtmp;
__BB(5):
goto __BB2;
__BB(2):
res_1 = __PHI (__BB5: 0.0, __BB3: res_2);
i_4 = __PHI (__BB5: 0, __BB3: i_5);
ivtmp_6 = __PHI (__BB5: 100U, __BB3: ivtmp_7);
index = (long unsigned int) i_4;
offset = index * 8UL;
xi_ptr = x_8(D) + offset;
xi = *xi_ptr;
neg_xi = -xi;
res_2 = neg_xi + res_1;
i_5 = i_4 + 1;
ivtmp_7 = ivtmp_6 - 1U;
if (ivtmp_7 != 0U)
goto __BB3;
else
goto __BB4;
__BB(3):
goto __BB2;
__BB(4):
res_3 = __PHI (__BB2: res_2);
return res_3;
}
There is no COND_LEN_ADD IR here which is incorrect.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug c/111761] risc-v regression: COND_LEN_* incorrect fold/simplify in middle-end
2023-10-10 14:30 [Bug c/111761] New: risc-v regression: COND_LEN_* incorrect fold/simplify in middle-end juzhe.zhong at rivai dot ai
@ 2023-10-10 17:47 ` pinskia at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2023-10-10 17:47 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111761
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
.
*** This bug has been marked as a duplicate of bug 111760 ***
^ permalink raw reply [flat|nested] 2+ messages in thread
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2023-10-10 14:30 [Bug c/111761] New: risc-v regression: COND_LEN_* incorrect fold/simplify in middle-end juzhe.zhong at rivai dot ai
2023-10-10 17:47 ` [Bug c/111761] " pinskia at gcc dot gnu.org
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