100x -O0 Compile Time Regression {3.2,3.3} -> {3.4,3.5}

[John Vickers]

Mike Stump wrote:
> On Thursday, February 12, 2004, at 01:50 PM, John Vickers wrote:
> 
>> We've got some generated C++ which compiles in about 10s (on a P4 
>> 2800) at -O0 with gcc-3.2 or 3.3.2, but takes about 1000s with 3.4.0 
>> or 3.5.0.
> 
> 
> Oh, you will want to configure with --disable-checking and ensure that 
> you built an optimized compiler.  The first isn't the default in 
> development sources, the later should be, but, might not if you do 
> builds in the gcc dir.
> 
> Also, you should be using bootstrap to build the compiler.

:-)

Yup, done that.  (The configure options are in the attachment!)

I forgot about --disable-checking at first.  But it didn't make much difference (few percent).

The uncompressed .ii file is about 5.2M.  Is that OK to attach to bugzilla ?

I'll file a report in the morning (GMT).

Thanks.

John.