http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53272
Hans-Peter Nilsson <hp at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-05-08
AssignedTo|unassigned at gcc dot |hp at gcc dot gnu.org
|gnu.org |
Ever Confirmed|0 |1
--- Comment #1 from Hans-Peter Nilsson <hp at gcc dot gnu.org> 2012-05-08
00:11:03 UTC ---
Created attachment 27337
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27337
testcase to be compiled with -O2
The effect of the bug is to eliminate the NULL-pointer check for rtc->ops->f
and always call it, which is not a good idea when it is NULL. Test-case
derived from a Linux driver.
Unfortunately, presence of a main function makes the bug hide by slightly
changing the generated code, so I have to put the framework in a separate file
to make a runnable test-case. This is a secondary bug, for which I will clone a
PR from this PR: with the marker-asms and attributes noclone, noinline, there
should be no need for that. It seems static branch predictions change.
