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Re: c/9902: optimization level -O2/3 doesn't work correctly.
- From: ebotcazou at gcc dot gnu dot org
- To: gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, gennadi dot f at corigin dot com, nobody at gcc dot gnu dot org
- Date: 14 Mar 2003 15:48:30 -0000
- Subject: Re: c/9902: optimization level -O2/3 doesn't work correctly.
- Reply-to: ebotcazou at gcc dot gnu dot org, gcc-bugs at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org, gennadi dot f at corigin dot com, nobody at gcc dot gnu dot org, gcc-gnats at gcc dot gnu dot org
Synopsis: optimization level -O2/3 doesn't work correctly.
State-Changed-From-To: open->closed
State-Changed-By: ebotcazou
State-Changed-When: Fri Mar 14 15:48:30 2003
State-Changed-Why:
Not a bug. Your code breaks the ISO C aliasing rules. GCC
automatically turns on -fstrict-aliasing at -O2 so you need
to fix your code or compile it with -fno-strict-aliasing.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9902