From: fjh@cs.mu.OZ.AU (Fergus Henderson) Subject: Re: gcc 2.7-b19 on gnu-win32 b19 generating bad asm 31 Jul 1998 15:33:56 -0700 Message-ID: <19980731001629.54351.cygnus.gnu-win32@mundook.cs.mu.OZ.AU> References: <19980728070132.40820@murlibobo.cs.mu.OZ.AU> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii To: Sam Holden Cc: gnu-win32@cygnus.com On 29-Jul-1998, Sam Holden wrote: > Fergus Henderson writes: > >GNU C version 2.7-b19 on gnu-win32 version b19.1 (intel x86) > >generates bad assembler for the following program. The program > >(cut down from C code automatically generated by the Mercury compiler) > >is not strictly conforming, but even so, the generated assembler > >is pretty nonsensical. This worked fine in b18. > > > >To reproduce the problem, compile the following program with `gcc -O2 -S'. .... > Of course if it really did work with b18 then I will be completely wrong. Yes, it really did work with b18. > Also if gcc has been patched on cygwin32 I'll be wrong. But anyway... .... > Using -O2 to me is a lot risky since my docs say : > > Users of gcc 2.7.0 thru 2.7.2 should note that there is a bug in -O2 on > these. Specifically, strength reduction doesn't work. That wasn't the problem here. BTW, the bug I reported has indeed been fixed in egcs 1.0.2. -- Fergus Henderson | "I have always known that the pursuit WWW: | of excellence is a lethal habit" PGP: finger fjh@128.250.37.3 | -- the last words of T. S. Garp. - For help on using this list (especially unsubscribing), send a message to "gnu-win32-request@cygnus.com" with one line of text: "help".