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[Bug bootstrap/43403] [4.5 Regression] ICE in stage1 compiling __bswapdi2
- From: "dave at hiauly1 dot hia dot nrc dot ca" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 17 Mar 2010 18:19:48 -0000
- Subject: [Bug bootstrap/43403] [4.5 Regression] ICE in stage1 compiling __bswapdi2
- References: <bug-43403-276@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #6 from dave at hiauly1 dot hia dot nrc dot ca 2010-03-17 18:19 -------
Subject: Re: [4.5 Regression] ICE in stage1 compiling __bswapdi2
> var-tracking expects that if frame_pointer_rtx (resp. arg_pointer_rtx,
> depending on whether FRAME_POINTER_CFA_OFFSET or ARG_POINTER_CFA_OFFSET is
> defined)
> is said to be eliminated (to stack_pointer_rtx in case of
> !frame_pointer_needed), then it is actually eliminated. Apparently that's not
> the case on PA, which happily uses both %r3 and %r30 in the code.
ELIMINABLE_REGS isn't defined, we have the default frame pointer
elimination. If the frame pointer has been eliminated, then %r3
shouldn't be the frame pointer. I see that %r3 is used in the code
but it's not used as the frame pointer.
Dave
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43403