HEADS-UP: gcc-4.2 import appears to miscompile libm.

Steve Kargl sgk at troutmask.apl.washington.edu
Sat May 26 23:08:00 UTC 2007


On Sat, May 26, 2007 at 06:57:31PM -0400, Kris Kennaway wrote:
> On Sat, May 26, 2007 at 03:40:40PM -0700, Steve Kargl wrote:
> > 
> > Using -O instead of -O2 indeed appears to fix the problem.
> 
> How about -O2 -fno-tree-vrp?
> 

I'm getting there.  For those new to gcc-4.x, there are
-fdump-tree-* options that dump a boatload of intermediate
results.  I'm wading through the -fdump-tree-all directories.

OK.  -fno-tree-vrp does not help.

-- 
Steve


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