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From: mlelstv@dev.de.cw.net To: gcc-gnats@gcc.gnu.org Subject: optimization/9775: -O3 complains about stdarg functions Date: Thu, 20 Feb 2003 16:06:00 -0000 [thread overview] Message-ID: <20030220160515.13510.qmail@sources.redhat.com> (raw) >Number: 9775 >Category: optimization >Synopsis: -O3 complains about stdarg functions >Confidential: no >Severity: serious >Priority: medium >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Thu Feb 20 16:06:01 UTC 2003 >Closed-Date: >Last-Modified: >Originator: Michael van Elst >Release: gcc-3.2.2 >Organization: >Environment: FreeBSD dt4.dev.de.cw.net 4.7-STABLE FreeBSD 4.7-STABLE #0: Fri Oct 11 18:32:25 CEST 2002 root@dt4.dev.de.cw.net:/usr/src/sys/compile/DT4 i386 Reading specs from /cw/lib/gcc-lib/i386-unknown-freebsd4.7/3.2.2/specs Configured with: ../configure --prefix=/cw --exec-prefix=/cw --includedir=/cw/include/gcc --with-gxx-include-dir=/cw/include/g++ --with-local-prefix=/cw/lib/gcc-lib --enable-languages=c,c++ --enable-threads=posix --disable-maintainer-mode --disable-shared --disable-nls --with-gnu-as --with-gnu-ld Thread model: posix gcc version 3.2.2 >Description: gcc does not compile the following source with -O3, smaller optimization levels do work fine. The error reported is: % gcc -O3 -c c.c c.c: In function `bar': c.c:8: `va_start' used in function with fixed args c.c:8: `va_start' used in function with fixed args -- snip -- #include <stdarg.h> int foo(int c, ...) { va_list ap; int a, s=0; va_start(ap,c); while (c > 0) { a = va_arg(ap, int); c += a; } va_end(ap); return s; } int bar(void) { return foo(4,1,2,3,4) + foo(2,9,5); } >How-To-Repeat: see above. The same happens with gcc-3.2.1 but not with gcc-2.95.4 >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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