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Re: Live range splitting in new allocator
- To: rth at redhat dot com, torvalds at transmeta dot com
- Subject: Re: Live range splitting in new allocator
- From: dewar at gnat dot com
- Date: Tue, 30 Jan 2001 09:00:50 -0500 (EST)
- Cc: dewar at gnat dot com, gcc at gcc dot gnu dot org, meissner at cygnus dot com
<<Indeed. If -g subtly changes the code generated by
"-O99 -fdiscombobulate", it can be a real nightmare
finding a compiler bug.
>>
Or a user bug. We see all the time cases of erroneous programs,
e.g. from the use of an uninitialized variable, that work "fine"
in -O0, but blow up in -O2. Of course these often get reported
as compiler bugs, and they kind of look like compiler bugs to the
app programmer, but they are not!