Re: [PATCH 5/5] combine: preferably delete dead SETs in PARALLELs

2014-11-18 Thread Jeff Law
On 11/18/14 06:42, Segher Boessenkool wrote: On Tue, Nov 18, 2014 at 06:38:49AM -0600, Segher Boessenkool wrote: Does it help pr52714 where we'd like to rip apart a PARALLEL with two sets, one of which is dead. If so, it might allow us to optimize that code better. It does not seem to fix th

Re: [PATCH 5/5] combine: preferably delete dead SETs in PARALLELs

2014-11-18 Thread Segher Boessenkool
On Tue, Nov 18, 2014 at 06:38:49AM -0600, Segher Boessenkool wrote: > > Does it help pr52714 where we'd like to rip apart a PARALLEL with two > > sets, one of which is dead. If so, it might allow us to optimize that > > code better. > > It does not seem to fix the testcase. I'll investigate w

Re: [PATCH 5/5] combine: preferably delete dead SETs in PARALLELs

2014-11-18 Thread Segher Boessenkool
On Mon, Nov 17, 2014 at 02:13:22PM -0700, Jeff Law wrote: > On 11/14/14 12:19, Segher Boessenkool wrote: > >If the result of combining some insns is a PARALLEL of two SETs, and that > >is not a recognised insn, and one of the SETs is dead, combine tries to > >use the remaining SET as insn. > > > >T

Re: [PATCH 5/5] combine: preferably delete dead SETs in PARALLELs

2014-11-17 Thread Jeff Law
On 11/14/14 12:19, Segher Boessenkool wrote: If the result of combining some insns is a PARALLEL of two SETs, and that is not a recognised insn, and one of the SETs is dead, combine tries to use the remaining SET as insn. This patch changes things around so that the one SET is preferably used, n

[PATCH 5/5] combine: preferably delete dead SETs in PARALLELs

2014-11-14 Thread Segher Boessenkool
If the result of combining some insns is a PARALLEL of two SETs, and that is not a recognised insn, and one of the SETs is dead, combine tries to use the remaining SET as insn. This patch changes things around so that the one SET is preferably used, not the PARALLEL. 2014-11-14 Segher Boessenko