On Thu, Apr 25, 2013 at 8:28 PM, Steve Ellcey wrote:
> On Thu, 2013-04-25 at 09:53 +0200, Richard Biener wrote:
>
>> We have gimple_duplicate_sese_region for this. It may be not perfect though.
>> Eventually it should be changed to handle SEME regions as well and all
>> loop copying / versioning
On Thu, 2013-04-25 at 09:53 +0200, Richard Biener wrote:
> We have gimple_duplicate_sese_region for this. It may be not perfect though.
> Eventually it should be changed to handle SEME regions as well and all
> loop copying / versioning code should use it as well (though I don't think
> any of th
On Thu, 2013-04-25 at 09:53 +0200, Richard Biener wrote:
> > Interesting you should mention this; one of the things I really want to get
> > back to is a more generic mechanism to copy block regions.
>
> We have gimple_duplicate_sese_region for this. It may be not perfect though.
> Eventually it
Hi,
> On Tue, 2013-04-23 at 15:24 -0600, Jeff Law wrote:
>
> > Well, you have to copy the blocks, adjust the edges and rewrite the SSA
> > graph. I'd use duplicate_block to help.
> >
> > You really want to look at tree-ssa-threadupdate.c. There's a nice big
> > block comment which gives the
On Thu, Apr 25, 2013 at 5:03 AM, Jeff Law wrote:
> On 04/24/2013 04:54 PM, Steve Ellcey wrote:
>>
>>
>> I am still having trouble with this and with figuring out how to
>> straighten out my PHI nodes. I have decided to try a slightly different
>> tack and see if I could create a routine that woul
On 04/24/2013 04:54 PM, Steve Ellcey wrote:
I am still having trouble with this and with figuring out how to
straighten out my PHI nodes. I have decided to try a slightly different
tack and see if I could create a routine that would do a generic basic
block copy, handling all the needed bookkee
On Wed, 2013-04-24 at 15:54 -0700, Steve Ellcey wrote:
>
> /* Copy the basic block that is the destination block of orig_edge, then
>modify/replace the edge in orig_edge->src basic block with a new edge
>that goes to the new block. Fix up any PHI nodes that may need to be
>updated.
On Wed, 2013-04-24 at 14:31 -0600, Jeff Law wrote:
> On 04/24/2013 11:38 AM, Steve Ellcey wrote:
> Just do duplicate_block (B, NULL, NULL)
>
> Then I'd remove the switch statement and the outgoing edges from B'
> except the edge B'->C.
>
> Then I'd fixup the PHIs in C. That's update_destinatio
On 04/24/2013 11:38 AM, Steve Ellcey wrote:
I think I understand the high level work, it is mapping that hight level
description to the low level calls that I am having trouble with. Lets
say I have basic blocks A, B, and C, and edges from A to B and B to C.
There may also be other edges leadin
On Tue, 2013-04-23 at 15:24 -0600, Jeff Law wrote:
> Well, you have to copy the blocks, adjust the edges and rewrite the SSA
> graph. I'd use duplicate_block to help.
>
> You really want to look at tree-ssa-threadupdate.c. There's a nice big
> block comment which gives the high level view of
On 04/23/2013 02:43 PM, Steve Ellcey wrote:
I think I have code that finds the path that I am interested in, but when
I try to use copy_bbs to copy the basic blocks in order to create my new path,
I get segfaults. I was wondering if anyone could help me understand what I
need to do, in addition
I decided to take a crack at the coremark optimization (PR 54742) for switch
statements. Since I couldn't figure out the existing jump threading
optimization enough to extend it properly, I decided to try a plugin
optimization pass just for this case and see if I could get that to work.
The basic
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