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Re: c++/7916: [3.2/3.3 regression] ICE in instantiate_virtual_register_1
- From: Janis Johnson <janis187 at us dot ibm dot com>
- To: gcc-gnats at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, gcc-bugs at gcc dot gnu dot org, nobody at gcc dot gnu dot org, hope2see at chol dot com, jh at suse dot cz
- Date: Fri, 20 Dec 2002 14:43:46 -0800
- Subject: Re: c++/7916: [3.2/3.3 regression] ICE in instantiate_virtual_register_1
- Organization: IBM
- Reply-to: janis187 at us dot ibm dot com
The regression reported in PR c++/7916 showed up starting
with this patch:
Wed Mar 14 22:26:10 CET 2001 Jan Hubicka <jh@suse.cz>
* i386.c (ix86_cmodel_string, ix86_cmodel): Define.
(override_options): Parse cmodel string.
(x86_64_sign_extended_value, x86_64_zero_extended_value): New.
* i386.h (TARGET_OPTIONS): Add "cmodel".
(EXTRA_CONSTRAINT): Recognize 'e' and 'Z'.
(enum cmodel): New.
(ix86_cmodel_string, ix86_cmodel): Declare.
Spot by Matt Kraai:
* i386.h (GENERAL_REG_P): Add missing REG_P.
Here's a small test case that causes the compiler to ICE
when compiled on i686-linux. The PR is against C++, but my
testing used cc1 rather than cc1plus.
-------------------
void foo(char *dst, char xchg, char cmp)
{
__asm__("lock" "\tcmpxchgb %1, (%2)\t\n"
:"=al"(cmp)
:"dl"(xchg), "r"(dst), "al"(cmp));
}
-------------------
Output from the mainline compiler:
7916.c: In function `foo':
7916.c:6: internal compiler error: in instantiate_virtual_regs_1,
at function.c:3898
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=7916