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* [Bug tree-optimization/65511] New: transform_to_exit_first_loop
@ 2015-03-22 10:32 vries at gcc dot gnu.org
2015-03-22 12:46 ` [Bug tree-optimization/65511] transform_to_exit_first_loop looses edge probabilities vries at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: vries at gcc dot gnu.org @ 2015-03-22 10:32 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65511
Bug ID: 65511
Summary: transform_to_exit_first_loop
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: trivial
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: vries at gcc dot gnu.org
before transform_to_exit_first_loop the loop backedge/exit edge probabilities
are 99/1:
...
if (i.0_21 < n_5(D))
goto <bb 9>;
else
goto <bb 6>;
;; succ: 9 [99.0%] (TRUE_VALUE,EXECUTABLE)
;; 6 [1.0%] (FALSE_VALUE,EXECUTABLE)
...
afterwards, they are 100/0:
...
# ivtmp_25 = PHI <0(11), ivtmp_23(7)>
if (ivtmp_25 < _12)
goto <bb 13>;
else
goto <bb 14>;
;; succ: 13 [100.0%] (TRUE_VALUE,EXECUTABLE)
;; 14 (FALSE_VALUE,EXECUTABLE)
...
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/65511] transform_to_exit_first_loop looses edge probabilities
2015-03-22 10:32 [Bug tree-optimization/65511] New: transform_to_exit_first_loop vries at gcc dot gnu.org
@ 2015-03-22 12:46 ` vries at gcc dot gnu.org
2015-03-22 12:52 ` vries at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: vries at gcc dot gnu.org @ 2015-03-22 12:46 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65511
--- Comment #2 from vries at gcc dot gnu.org ---
using tentative patch, we get:
...
if (ivtmp_25 < _12)
goto <bb 13>;
else
goto <bb 14>;
;; succ: 13 [99.0%] (TRUE_VALUE,EXECUTABLE)
;; 14 [1.0%] (FALSE_VALUE,EXECUTABLE)
...
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/65511] transform_to_exit_first_loop looses edge probabilities
2015-03-22 10:32 [Bug tree-optimization/65511] New: transform_to_exit_first_loop vries at gcc dot gnu.org
2015-03-22 12:46 ` [Bug tree-optimization/65511] transform_to_exit_first_loop looses edge probabilities vries at gcc dot gnu.org
@ 2015-03-22 12:52 ` vries at gcc dot gnu.org
2015-03-31 11:26 ` vries at gcc dot gnu.org
2015-06-14 14:17 ` vries at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: vries at gcc dot gnu.org @ 2015-03-22 12:52 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65511
--- Comment #3 from vries at gcc dot gnu.org ---
testcase:
...
#define N 1000
unsigned int a[N];
unsigned int b[N];
unsigned int c[N];
void __attribute__((noclone,noinline))
f (unsigned int n)
{
int i;
#pragma omp parallel
{
#pragma omp for
for (i = 0; i < n; ++i)
c[i] = a[i] + b[i];
}
}
...
compiled with -O2 -ftree-parallelize-loops=2
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/65511] transform_to_exit_first_loop looses edge probabilities
2015-03-22 10:32 [Bug tree-optimization/65511] New: transform_to_exit_first_loop vries at gcc dot gnu.org
2015-03-22 12:46 ` [Bug tree-optimization/65511] transform_to_exit_first_loop looses edge probabilities vries at gcc dot gnu.org
2015-03-22 12:52 ` vries at gcc dot gnu.org
@ 2015-03-31 11:26 ` vries at gcc dot gnu.org
2015-06-14 14:17 ` vries at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: vries at gcc dot gnu.org @ 2015-03-31 11:26 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65511
--- Comment #6 from vries at gcc dot gnu.org ---
bootstrapped and reg-tested:
- https://gcc.gnu.org/ml/gcc-patches/2015-03/msg01536.html
- https://gcc.gnu.org/ml/gcc-patches/2015-03/msg01537.html
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/65511] transform_to_exit_first_loop looses edge probabilities
2015-03-22 10:32 [Bug tree-optimization/65511] New: transform_to_exit_first_loop vries at gcc dot gnu.org
` (2 preceding siblings ...)
2015-03-31 11:26 ` vries at gcc dot gnu.org
@ 2015-06-14 14:17 ` vries at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: vries at gcc dot gnu.org @ 2015-06-14 14:17 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65511
--- Comment #7 from vries at gcc dot gnu.org ---
pinged patches at:
- https://gcc.gnu.org/ml/gcc-patches/2015-06/msg00976.html
- https://gcc.gnu.org/ml/gcc-patches/2015-06/msg00977.html
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2015-06-14 14:17 UTC | newest]
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2015-03-22 10:32 [Bug tree-optimization/65511] New: transform_to_exit_first_loop vries at gcc dot gnu.org
2015-03-22 12:46 ` [Bug tree-optimization/65511] transform_to_exit_first_loop looses edge probabilities vries at gcc dot gnu.org
2015-03-22 12:52 ` vries at gcc dot gnu.org
2015-03-31 11:26 ` vries at gcc dot gnu.org
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