https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19790
Jeffrey A. Law changed:
What|Removed |Added
Status|NEW |RESOLVED
CC|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=19790
Bug 19790 depends on bug 15459, which changed state.
Bug 15459 Summary: [meta-bug] there should be a tree combiner like the rtl one
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=15459
What|Removed |Added
--- Comment #6 from pinskia at gcc dot gnu dot org 2008-09-09 01:51 ---
The testcase in comment #5 looks like the same issue are referenced in PR
32200.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19790
--- Comment #4 from steven at gcc dot gnu dot org 2008-07-06 09:37 ---
Still doesn't work. You need to replace one line for the test case of comment
#0 though, because the tree optimizers are now smart enough to see that (i/32)
is always 0. So replace
for (i = 0; i = 10; i++)
--- Comment #5 from rguenth at gcc dot gnu dot org 2008-07-06 12:20 ---
So we can optimize
void __attribute__((noinline))
bar (int i)
{
asm ();
}
extern void link_error (void);
void
foo (void)
{
int i;
for (i = 0; i = 320; i++)
{
bar (i);
if (i 320)
--- Additional Comments From pinskia at gcc dot gnu dot org 2005-09-21
01:57 ---
We now get:
# i_7 = PHI i_3(1), 0(0);
L0:;
i_3 = i_7 + 1;
bar (i_3);
D.1284_13 = *array_8;
D.1285_14 = (long unsigned int) D.1284_13;
D.1286_15 = i_7 31;
D.1287_16 = 1 D.1286_15;
D.1288_17
--- Additional Comments From pinskia at gcc dot gnu dot org 2005-05-04
20:31 ---
We get:
i_3 = i_6 + 1;
bar (i_3);
D.1284_20 = (unsigned int) i_3;
i.0_25 = D.1284_20 + 0;
D.1241_5 = i.0_25 5;
D.1242_10 = D.1241_5 * 4;
D.1243_11 = (int *) D.1242_10;
D.1244_12 =
--
What|Removed |Added
CC||stevenb at suse dot de
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19790
--
What|Removed |Added
OtherBugsDependingO||19721
nThis||
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19790
--- Additional Comments From pinskia at gcc dot gnu dot org 2005-02-06
16:12 ---
Confirmed but guess what my tree combiner fixes the problem:
# i_24 = PHI i_9(1), 0(0);
L0:;
D.1165_26 = (unsigned int) i_24;
D.1166_25 = D.1165_26 + 1;
i_9 = (int) D.1166_25;
bar (i_9);
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