Re: [PATCH] PR67421, Cost instruction sequences when doing left wide shift

2015-09-09 Thread Jeff Law
On 09/03/2015 09:34 AM, Jiong Wang wrote: As Rainer reported at https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67421 Also, as described at https://gcc.gnu.org/ml/gcc-patches/2015-08/msg01147.html This patch relax the restriction on wide left shift. Previously we always honor target priva

[PATCH] PR67421, Cost instruction sequences when doing left wide shift

2015-09-03 Thread Jiong Wang
As Rainer reported at https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67421 Also, as described at https://gcc.gnu.org/ml/gcc-patches/2015-08/msg01147.html This patch relax the restriction on wide left shift. Previously we always honor target private pattern, so when the following check be tru