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[Bug target/67265] [x86] 'asm' operand has impossible constraints with -fstack-check
- From: "pinskia at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 19 Aug 2015 00:45:20 +0000
- Subject: [Bug target/67265] [x86] 'asm' operand has impossible constraints with -fstack-check
- Auto-submitted: auto-generated
- References: <bug-67265-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67265
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
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Component|c |target
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
X86 is very much under huge register pressure and that inline-asm uses 4
registers as input/output and two memory ones. -fastback-check forces one more
register not to be available really.