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* [Bug middle-end/52940] New: conversion from MODE_PARTIAL_INT uses sign extension for unsigned types
@ 2012-04-11 23:08 bigotp at acm dot org
2012-04-24 6:42 ` [Bug middle-end/52940] " ebotcazou at gcc dot gnu.org
` (2 more replies)
0 siblings, 3 replies; 4+ messages in thread
From: bigotp at acm dot org @ 2012-04-11 23:08 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52940
Bug #: 52940
Summary: conversion from MODE_PARTIAL_INT uses sign extension
for unsigned types
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
In expr.c:convert_move, when from_mode has class MODE_PARTIAL_INT the
conversion is done with sign extension even for unsigned types. This has been
the behavior since the code was added in 2003, but it seems like a bug.
^ permalink raw reply [flat|nested] 4+ messages in thread* [Bug middle-end/52940] conversion from MODE_PARTIAL_INT uses sign extension for unsigned types 2012-04-11 23:08 [Bug middle-end/52940] New: conversion from MODE_PARTIAL_INT uses sign extension for unsigned types bigotp at acm dot org @ 2012-04-24 6:42 ` ebotcazou at gcc dot gnu.org 2012-04-26 13:54 ` bernds at gcc dot gnu.org 2012-04-26 14:21 ` bernds at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: ebotcazou at gcc dot gnu.org @ 2012-04-24 6:42 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52940 Eric Botcazou <ebotcazou at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW URL| |http://gcc.gnu.org/ml/gcc-p | |atches/2012-04/msg01043.htm | |l Last reconfirmed| |2012-04-24 CC| |bernds at gcc dot gnu.org, | |ebotcazou at gcc dot | |gnu.org Ever Confirmed|0 |1 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug middle-end/52940] conversion from MODE_PARTIAL_INT uses sign extension for unsigned types 2012-04-11 23:08 [Bug middle-end/52940] New: conversion from MODE_PARTIAL_INT uses sign extension for unsigned types bigotp at acm dot org 2012-04-24 6:42 ` [Bug middle-end/52940] " ebotcazou at gcc dot gnu.org @ 2012-04-26 13:54 ` bernds at gcc dot gnu.org 2012-04-26 14:21 ` bernds at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: bernds at gcc dot gnu.org @ 2012-04-26 13:54 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52940 Bernd Schmidt <bernds at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |FIXED --- Comment #1 from Bernd Schmidt <bernds at gcc dot gnu.org> 2012-04-26 13:54:03 UTC --- Committed now. ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug middle-end/52940] conversion from MODE_PARTIAL_INT uses sign extension for unsigned types 2012-04-11 23:08 [Bug middle-end/52940] New: conversion from MODE_PARTIAL_INT uses sign extension for unsigned types bigotp at acm dot org 2012-04-24 6:42 ` [Bug middle-end/52940] " ebotcazou at gcc dot gnu.org 2012-04-26 13:54 ` bernds at gcc dot gnu.org @ 2012-04-26 14:21 ` bernds at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: bernds at gcc dot gnu.org @ 2012-04-26 14:21 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52940 --- Comment #2 from Bernd Schmidt <bernds at gcc dot gnu.org> 2012-04-26 14:20:50 UTC --- Author: bernds Date: Thu Apr 26 14:20:39 2012 New Revision: 186877 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=186877 Log: PR middle-end/52940 * machmode.h (CLASS_HAS_WIDER_MODES_P): True for MODE_PARTIAL_INT. * expr.c (convert_move): Honor unsignedp when extending partial int modes. * genmodes.c (complete_mode): Don't clear component field of partial int modes. (emit_mode_inner): Don't emit it however. (calc_wider_mode): Partial int modes widen to their component. Modified: trunk/gcc/ChangeLog trunk/gcc/expr.c trunk/gcc/genmodes.c trunk/gcc/machmode.h ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2012-04-26 14:21 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-04-11 23:08 [Bug middle-end/52940] New: conversion from MODE_PARTIAL_INT uses sign extension for unsigned types bigotp at acm dot org 2012-04-24 6:42 ` [Bug middle-end/52940] " ebotcazou at gcc dot gnu.org 2012-04-26 13:54 ` bernds at gcc dot gnu.org 2012-04-26 14:21 ` bernds at gcc dot gnu.org
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