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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] Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 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
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