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* [Bug c/47644] New: [avr] Regression in choosing registers @ 2011-02-08 11:48 Kip.Hicit at gmail dot com 2011-02-08 11:48 ` [Bug c/47644] [avr] Optimisation regression " Kip.Hicit at gmail dot com ` (2 more replies) 0 siblings, 3 replies; 4+ messages in thread From: Kip.Hicit at gmail dot com @ 2011-02-08 11:48 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47644 Summary: [avr] Regression in choosing registers Product: gcc Version: 4.3.3 Status: UNCONFIRMED Severity: minor Priority: P3 Component: c AssignedTo: unassigned@gcc.gnu.org ReportedBy: Kip.Hicit@gmail.com Created attachment 23275 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23275 Test case in C Consider the following snippet compiled with -O3: int lsl_short(int f) { return f << 1; } gcc 4.3.3 is copying the value from r25:r24 (first parameter) to r19:r18, then moving back to r25:r24 (return value). Same for longs but with 4 registers. Expected: The lsl and rol should happen directly on r25:r24, just as they did in 4.2 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/47644] [avr] Optimisation regression in choosing registers 2011-02-08 11:48 [Bug c/47644] New: [avr] Regression in choosing registers Kip.Hicit at gmail dot com @ 2011-02-08 11:48 ` Kip.Hicit at gmail dot com 2011-02-08 12:09 ` Kip.Hicit at gmail dot com 2012-10-21 20:54 ` [Bug target/47644] " gjl at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: Kip.Hicit at gmail dot com @ 2011-02-08 11:48 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47644 --- Comment #1 from Ángel <Kip.Hicit at gmail dot com> 2011-02-08 11:47:46 UTC --- Created attachment 23276 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23276 gcc 4.3.3 assembler ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug c/47644] [avr] Optimisation regression in choosing registers 2011-02-08 11:48 [Bug c/47644] New: [avr] Regression in choosing registers Kip.Hicit at gmail dot com 2011-02-08 11:48 ` [Bug c/47644] [avr] Optimisation regression " Kip.Hicit at gmail dot com @ 2011-02-08 12:09 ` Kip.Hicit at gmail dot com 2012-10-21 20:54 ` [Bug target/47644] " gjl at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: Kip.Hicit at gmail dot com @ 2011-02-08 12:09 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47644 --- Comment #2 from Ángel <Kip.Hicit at gmail dot com> 2011-02-08 11:48:37 UTC --- Created attachment 23277 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=23277 gcc 4.2 assembler ^ permalink raw reply [flat|nested] 4+ messages in thread
* [Bug target/47644] [avr] Optimisation regression in choosing registers 2011-02-08 11:48 [Bug c/47644] New: [avr] Regression in choosing registers Kip.Hicit at gmail dot com 2011-02-08 11:48 ` [Bug c/47644] [avr] Optimisation regression " Kip.Hicit at gmail dot com 2011-02-08 12:09 ` Kip.Hicit at gmail dot com @ 2012-10-21 20:54 ` gjl at gcc dot gnu.org 2 siblings, 0 replies; 4+ messages in thread From: gjl at gcc dot gnu.org @ 2012-10-21 20:54 UTC (permalink / raw) To: gcc-bugs http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47644 Georg-Johann Lay <gjl at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED CC| |gjl at gcc dot gnu.org Resolution| |DUPLICATE --- Comment #3 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-10-21 20:54:12 UTC --- Duplicate of PR52278 *** This bug has been marked as a duplicate of bug 52278 *** ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2012-10-21 20:54 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2011-02-08 11:48 [Bug c/47644] New: [avr] Regression in choosing registers Kip.Hicit at gmail dot com 2011-02-08 11:48 ` [Bug c/47644] [avr] Optimisation regression " Kip.Hicit at gmail dot com 2011-02-08 12:09 ` Kip.Hicit at gmail dot com 2012-10-21 20:54 ` [Bug target/47644] " gjl at gcc dot gnu.org
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