Re: [PATCH, PR51005] Fix slow down of compilation of 20001226-1.c by -ftree-tail-merge

2011-11-14 Thread David Miller
From: Richard Guenther Date: Mon, 14 Nov 2011 21:43:30 +0100 > On Mon, Nov 14, 2011 at 2:02 PM, Tom de Vries wrote: >> This patch fixes the slow down in the compilation of 20001226-1.c caused by >> -ftree-tail-merge. ... >> ok for trunk? > > Ok. Tom, thanks for working on this. And Richard,

Re: [PATCH, PR51005] Fix slow down of compilation of 20001226-1.c by -ftree-tail-merge

2011-11-14 Thread Richard Guenther
On Mon, Nov 14, 2011 at 2:02 PM, Tom de Vries wrote: > Richard, > > This patch fixes the slow down in the compilation of 20001226-1.c caused by > -ftree-tail-merge. > > -ftree-tree-tail-merge removes half of the 16000 basic blocks, but increases > compilation time with a factor 2.4 from 34 seconds

[PATCH, PR51005] Fix slow down of compilation of 20001226-1.c by -ftree-tail-merge

2011-11-14 Thread Tom de Vries
Richard, This patch fixes the slow down in the compilation of 20001226-1.c caused by -ftree-tail-merge. -ftree-tree-tail-merge removes half of the 16000 basic blocks, but increases compilation time with a factor 2.4 from 34 seconds to 80 seconds (not counting the further increase of 46 seconds by