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[Bug rtl-optimization/66782] [5/6 Regression] Unable to run 64-bit wine after MS->SYSV register changes
- From: "vmakarov at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 08 Jul 2015 19:43:30 +0000
- Subject: [Bug rtl-optimization/66782] [5/6 Regression] Unable to run 64-bit wine after MS->SYSV register changes
- Auto-submitted: auto-generated
- References: <bug-66782-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66782
--- Comment #11 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Michael Matz from comment #9)
> I don't see any code in inherit_reload_reg or its caller inherit_in_ebb
> that would look at CALL_INSN_FUNCTION_USAGE on any intervening insns,
> between the inheritance setup and any of the next usage insns.
Mike, thanks for the analysis.
Inheritance code has a simplified live analysis which is needed only when there
is inheritance beyond BB.
The full live analysis is done by code in lra-lives.c which is executed right
after inheritance but before the assignment code in lra-assigns.c.