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[Bug inline-asm/11807] GCC should error out when clobbering the stack or frame pointer
- From: "falk at debian dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 22 Nov 2003 17:55:03 -0000
- Subject: [Bug inline-asm/11807] GCC should error out when clobbering the stack or frame pointer
- References: <20030805124527.11807.aw11@os.inf.tu-dresden.de>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From falk at debian dot org 2003-11-22 17:55 -------
(In reply to comment #11)
> > + case HARD_FRAME_POINTER_REGNUM:
> > + error ("Frame pointer register `%s' clobbered in `asm'", regname);
>
> This one's more interesting, since if CAN_DEBUG_WITHOUT_FP we often won't
> need or use a frame pointer. I think this error should be delayed until
> reload has decided that a frame pointer is necessary.
Maybe. It's currently broken even for frameless, though, at least on
Alpha:
int f(int x) { asm ("nop" : : : "$15"); return x; }
mov a0,v0
nop
ret
even though $15/fp/s6 is a callee-saved register in frameless
functions.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=11807