[Bug rtl-optimization/20369] noce_emit_move_insn emits invalid insns

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=20369

Andrew Pinski  changed:

   What|Removed |Added

   Last reconfirmed|2019-03-05 00:00:00 |2021-8-16

--- Comment #5 from Andrew Pinski  ---
Still true.

[Bug rtl-optimization/20369] noce_emit_move_insn emits invalid insns

[steven at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=20369

Steven Bosscher  changed:

   What|Removed |Added

   Last reconfirmed|2007-05-17 17:50:53 |2019-3-5

--- Comment #4 from Steven Bosscher  ---
The patch of comment #2 doesn't apply since r100240 (fix for PR9814).
But comment #4 is still true.

Even without a test case, this bug could be fixed by asserting that
the generated seq is recognized.

[Bug rtl-optimization/20369] noce_emit_move_insn emits invalid insns

[ebotcazou at gcc dot gnu dot org]

--- Comment #2 from ebotcazou at gcc dot gnu dot org  2007-05-17 15:34 
---
Do you still have the testcase?


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ebotcazou at gcc dot gnu dot org changed:

   What|Removed |Added

 CC||ebotcazou at gcc dot gnu dot
   ||org
 Status|UNCONFIRMED |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20369

[Bug rtl-optimization/20369] noce_emit_move_insn emits invalid insns

[amylaar at gcc dot gnu dot org]

--- Comment #3 from amylaar at gcc dot gnu dot org  2007-05-17 17:50 ---
(In reply to comment #2)
 Do you still have the testcase?
 

Not as such.  However, AFAICR it was triggered by a regression test
(i.e. building library or testcase).

But the issue should be clear enough without a testcase; it's explained in a
comment of the patch.

While the current code of noce_emit_move_insn has a check for recog_memoized,
It will still emit en invalid move if the move is invalid because the
destination is a paradoxical SUBREG with TRULY_NOOP_TRUNCATION being false,
and source is a REG.


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amylaar at gcc dot gnu dot org changed:

   What|Removed |Added

 Status|WAITING |NEW
 Ever Confirmed|0   |1
   Last reconfirmed|-00-00 00:00:00 |2007-05-17 17:50:53
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20369

[Bug rtl-optimization/20369] noce_emit_move_insn emits invalid insns

[pinskia at gcc dot gnu dot org]

-- 
   What|Removed |Added

OtherBugsDependingO|17652   |
  nThis||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20369

[Bug rtl-optimization/20369] noce_emit_move_insn emits invalid insns

[amylaar at gcc dot gnu dot org]

--- Additional Comments From amylaar at gcc dot gnu dot org  2005-03-07 
21:12 ---
Created an attachment (id=8355)
 -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=8355action=view)
proposed fix


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20369