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[Bug rtl-optimization/69195] [4.9/5/6 Regression] gcc.dg/torture/pr44913.c FAILs with -O3 -fno-dce -fno-forward-propagate
- From: "amodra at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 04 Mar 2016 02:16:21 +0000
- Subject: [Bug rtl-optimization/69195] [4.9/5/6 Regression] gcc.dg/torture/pr44913.c FAILs with -O3 -fno-dce -fno-forward-propagate
- Auto-submitted: auto-generated
- References: <bug-69195-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69195
Alan Modra <amodra at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #37862|0 |1
is obsolete| |
--- Comment #14 from Alan Modra <amodra at gmail dot com> ---
Created attachment 37863
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37863&action=edit
delete bad reg equiv and recreate store notes
This patch re-runs the second pass of update_equiv_regs after deleting bad reg
equiv notes. I suppose the only real advantage of this over simply running
delete_trivially_dead_insns early, is that this patch covers the case where
delete_unreachable_blocks changes register lifetimes in a way that makes the
reg equiv information bad for reload.