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Re: [PATCH] See through ADDR_EXPR for forwprop
Jeffrey A Law wrote:
> On Mon, 2005-05-23 at 14:10 +0200, Richard Guenther wrote:
>>This patch enables us to forward-propagate ADDR_EXPRs of the form
>> D.2326_109 = &dX.D.2303.D.2259.domain_m.D.2216;
>> D.2326_110 = D.2326_109;
>> D.2327_111 = &D.2326_110->D.2207;
>> this_112 = D.2327_111;
>> D.2802_113 = this_112->D.2161.domain_m;
>> D.2802_113 = dX.D.2303.D.2259.domain_m.D.2216.D.2207.D.2161.domain_m;
>>in one step, instead of waiting for .t75.forwprop3 like
>>happened in the testcase for PR19626.
>>Any reason why we should not do this?
>>Bootstrapped on x86_64-unknown-linux-gnu, regtesting in progress.
>>Ok for mainline after slush?
>>plain text document attachment (fix-forwprop)
>>2005-05-23 Richard Guenther <email@example.com>
>> * tree-ssa-forwprop.c (forward_propagate_addr_expr):
>> See through ADDR_EXPR in finding place to propagate into.
> I'm pretty sure you can't have an ADDR_EXPR on the LHS, so I suspect
> checking for it is just a tiny waste of time. I'm going to rebootstrap
> and retest with the first hunk removed.
Ok, I only had this for completeness. I'll need to learn more of what
exactly is gimple and what not.