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[Bug rtl-optimization/42691] problematic REG_EQUAL note added to SUBREG
- From: "ebotcazou at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 11 Jan 2010 22:00:16 -0000
- Subject: [Bug rtl-optimization/42691] problematic REG_EQUAL note added to SUBREG
- References: <bug-42691-17567@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from ebotcazou at gcc dot gnu dot org 2010-01-11 22:00 -------
The REG_EQUAL note is correct after fwprop but not after combine, so the
problem lies in combine. The note should have been removed by
adjust_for_new_dest since the destination of I3 has changed.
--
ebotcazou at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ebotcazou at gcc dot gnu dot
| |org
Component|middle-end |rtl-optimization
Summary|Wrong REG_EQUAL note is |problematic REG_EQUAL note
|added to SUBREG node |added to SUBREG
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42691