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Re: [Bug middle-end/16266] [4.0 regression]gcc.dg/c99-intconst-1.c compilation is very slow
- From: Diego Novillo <dnovillo at redhat dot com>
- To: "gcc-bugzilla at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- Cc: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 08 Oct 2004 19:32:20 -0400
- Subject: Re: [Bug middle-end/16266] [4.0 regression]gcc.dg/c99-intconst-1.c compilation is very slow
- Organization: Red Hat Canada
- References: <20040629130803.16266.amylaar@gcc.gnu.org> <20041008231146.31843.qmail@sourceware.org>
On Fri, 2004-10-08 at 19:11, joern dot rennecke at superh-support dot
com wrote:
> a) All or most of the speed regression comes from a
> slowdown in
> the --enable-checking code (or more of it)
>
There is a significant amount of new checking code post-tree-ssa.
However, I think I remember wondering why c99-intconst-1.c takes so long
to compile.
Can you compare pre-tree-ssa and current mainline both with checking
disabled? ISTR this test generating tons of GIMPLE.
Diego.