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* [Bug middle-end/52856] New: misuse of MODE_SIZE vice MODE_PRECISION in get_mode_bounds
@ 2012-04-03 21:43 bigotp at acm dot org
2012-04-09 22:32 ` [Bug middle-end/52856] " bigotp at acm dot org
2013-12-30 17:38 ` nickc at gcc dot gnu.org
0 siblings, 2 replies; 3+ messages in thread
From: bigotp at acm dot org @ 2012-04-03 21:43 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52856
Bug #: 52856
Summary: misuse of MODE_SIZE vice MODE_PRECISION in
get_mode_bounds
Classification: Unclassified
Product: gcc
Version: 4.7.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: bigotp@acm.org
get_mode_bounds improperly uses GET_MODE_BITSIZE(mode) instead of
GET_MODE_PRECISION(mode) when calculating the minimal and maximal values. This
produces the wrong answer for a 20-bit PSImode, causing an ordered comparison
of a PSImode integer with zero to improperly fold to a constant in the
out-of-tree msp430 back-end.
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug middle-end/52856] misuse of MODE_SIZE vice MODE_PRECISION in get_mode_bounds
2012-04-03 21:43 [Bug middle-end/52856] New: misuse of MODE_SIZE vice MODE_PRECISION in get_mode_bounds bigotp at acm dot org
@ 2012-04-09 22:32 ` bigotp at acm dot org
2013-12-30 17:38 ` nickc at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: bigotp at acm dot org @ 2012-04-09 22:32 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52856
--- Comment #1 from Peter A. Bigot <bigotp at acm dot org> 2012-04-09 22:31:59 UTC ---
Created attachment 27120
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27120
Replace GET_MODE_BITSIZE with GET_MODE_PRECISION where necessary
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug middle-end/52856] misuse of MODE_SIZE vice MODE_PRECISION in get_mode_bounds
2012-04-03 21:43 [Bug middle-end/52856] New: misuse of MODE_SIZE vice MODE_PRECISION in get_mode_bounds bigotp at acm dot org
2012-04-09 22:32 ` [Bug middle-end/52856] " bigotp at acm dot org
@ 2013-12-30 17:38 ` nickc at gcc dot gnu.org
1 sibling, 0 replies; 3+ messages in thread
From: nickc at gcc dot gnu.org @ 2013-12-30 17:38 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52856
Nick Clifton <nickc at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |nickc at gcc dot gnu.org
Resolution|--- |DUPLICATE
--- Comment #2 from Nick Clifton <nickc at gcc dot gnu.org> ---
This is a duplicate of 59613. Closing this one because 59613 includes a test
case.
*** This bug has been marked as a duplicate of bug 59613 ***
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2013-12-30 17:38 UTC | newest]
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2012-04-03 21:43 [Bug middle-end/52856] New: misuse of MODE_SIZE vice MODE_PRECISION in get_mode_bounds bigotp at acm dot org
2012-04-09 22:32 ` [Bug middle-end/52856] " bigotp at acm dot org
2013-12-30 17:38 ` nickc at gcc dot gnu.org
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