[Bug rtl-optimization/23650] Scheduler does not handle zero_extract correctly
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23650 Andrew Pinski changed: What|Removed |Added Status|WAITING |RESOLVED Resolution||INVALID --- Comment #11 from Andrew Pinski 2013-03-20 00:48:42 UTC --- No feedback in over an year so closing.
[Bug rtl-optimization/23650] Scheduler does not handle zero_extract correctly
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23650 Richard Guenther changed: What|Removed |Added Status|UNCONFIRMED |WAITING Last reconfirmed||2012-01-11 Ever Confirmed|0 |1 --- Comment #10 from Richard Guenther 2012-01-11 14:23:13 UTC --- Is this still an issue?
[Bug rtl-optimization/23650] Scheduler does not handle zero_extract correctly
--- Additional Comments From Erwin dot Unruh at fujitsu-siemens dot com 2005-09-20 07:22 --- Created an attachment (id=9780) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=9780&action=view) complete testcase (corrected) My first try on the testcase depends on the endianess. S/390 is big endian, intel is little endian. This revised testcase avoids this dependency. It runs correctly on intel (-O0 or -O3). -- What|Removed |Added Attachment #9773 is|0 |1 obsolete|| http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23650
[Bug rtl-optimization/23650] Scheduler does not handle zero_extract correctly
--- Additional Comments From rguenth at gcc dot gnu dot org 2005-09-19 17:57 --- Created an attachment (id=9774) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=9774&action=view) complete testcase Combining comment #1 and the testcase, declaring some functions and exchaning printf for abort() I cannot reproduce the bug as the testcase aborts with every optimization level, even -O0 -fno-strict-aliasing and shows this same behavior even with the intel compiler. Can you re-check, if the testcase is really working in some case? -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23650
[Bug rtl-optimization/23650] Scheduler does not handle zero_extract correctly
--- Additional Comments From Erwin dot Unruh at fujitsu-siemens dot com 2005-09-19 12:25 --- Created an attachment (id=9773) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=9773&action=view) testcase supplement Here is some additional coding, which calls the function given in the bug report. The exit code is 1 in case of error, zero otherwise. I was able to verify my original analysis with this test. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23650
[Bug rtl-optimization/23650] Scheduler does not handle zero_extract correctly
--- Additional Comments From Erwin dot Unruh at fujitsu-siemens dot com 2005-09-02 09:08 --- The zero_extract is generated by the combiner pass (x.c.17.combine). Note that the official documentation of zero_extract requires a mem:QI (see http://gcc.gnu.org/onlinedocs/gccint/Bit_002dFields.html). I just tested the case with a 4.0.1 crosscompiler. The error is still present. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23650
[Bug rtl-optimization/23650] Scheduler does not handle zero_extract correctly
--- Additional Comments From rguenth at gcc dot gnu dot org 2005-08-31 14:58 --- Also note that gcc 3.3.2 is not exactly state of the art, but unmaintained, and a fix would go at earliest into 3.4.5, which may be already fixed. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23650
[Bug rtl-optimization/23650] Scheduler does not handle zero_extract correctly
--- Additional Comments From bonzini at gcc dot gnu dot org 2005-08-31 14:45 --- Having a zero_extract that takes 16 bytes out of a QImode mem seems extremely wrong. Can you find out which pass generates that thing? Just grep for zero_extract:SI..mem[a-z/]:QI in all the files dumped by -da. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23650
[Bug rtl-optimization/23650] Scheduler does not handle zero_extract correctly
--- Additional Comments From rguenth at gcc dot gnu dot org 2005-08-31 14:39 --- Can you please provide a testcase that can be executed and does abort() if the outcome is wrong and has zero exit code if it is right? Thanks, Richard. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23650
[Bug rtl-optimization/23650] Scheduler does not handle zero_extract correctly
--- Additional Comments From Erwin dot Unruh at fujitsu-siemens dot com 2005-08-31 12:51 --- With option -fno-strict-aliasing the generated code is still incorrect. -- What|Removed |Added Status|RESOLVED|UNCONFIRMED Resolution|DUPLICATE | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23650
[Bug rtl-optimization/23650] Scheduler does not handle zero_extract correctly
--- Additional Comments From pinskia at gcc dot gnu dot org 2005-08-31 12:29 --- You are violating C aliasing rules, either use an union (which is a GCC extension) or use -fno-strict- alias. (Char2 * ) &var *** This bug has been marked as a duplicate of 21920 *** -- What|Removed |Added Status|UNCONFIRMED |RESOLVED Resolution||DUPLICATE http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23650
