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Re: Trunk build failure on Itanium
- To: "'gcc at gcc dot gnu dot org'" <gcc at gcc dot gnu dot org>
- Subject: Re: Trunk build failure on Itanium
- From: "Boehm, Hans" <hans_boehm at hp dot com>
- Date: Thu, 9 Aug 2001 19:43:44 -0700
I looked at this (see http://gcc.gnu.org/ml/gcc/2001-08/msg00555.html) a
little bit more.
It appears that propagate_one_insn is trying to (erroneously I think) delete
the instruction that restores ar.pfs before a sibcall. It correctly notices
the error because sibcall_epilogue_contains(insn) returns 1 .
The preceding call to insn_dead_p returned true because pbi->reg_live failed
to include ar.pfs, even though it's considered live at the end of the basic
block. I would guess that the liveness information for ar.pfs is no longer
propagated correctly through the sibcall?
Could someone who knows this code have a look at this, please?