Re: [PATCH] Fix REE for vector modes (PR rtl-optimization/64286, take 2)

2015-01-13 Thread Jeff Law
On 01/13/15 09:11, Jakub Jelinek wrote: On Mon, Jan 12, 2015 at 02:29:53PM -0700, Jeff Law wrote: On 01/12/15 12:59, Jakub Jelinek wrote: Hi! As mentioned in the PR, giving up for all vector mode extensions is unnecessary, but unlike scalar integer extensions, where the low part of the extende

Re: [PATCH] Fix REE for vector modes (PR rtl-optimization/64286)

2015-01-12 Thread Jeff Law
On 01/12/15 12:59, Jakub Jelinek wrote: Hi! As mentioned in the PR, giving up for all vector mode extensions is unnecessary, but unlike scalar integer extensions, where the low part of the extended value is the original value, for vectors this is not true, thus the old value is lost. Which mean