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Re: [PATCH] Fix stmt folding in the inliner (PR tree-optimization/88444)
- From: Jeff Law <law at redhat dot com>
- To: Jakub Jelinek <jakub at redhat dot com>, Richard Biener <rguenther at suse dot de>
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Thu, 13 Dec 2018 16:26:32 -0700
- Subject: Re: [PATCH] Fix stmt folding in the inliner (PR tree-optimization/88444)
- References: <20181213225909.GC12380@tucnak>
On 12/13/18 3:59 PM, Jakub Jelinek wrote:
> The inliner doesn't want to fold statements immediately, but records them
> and then fold_marked_statements is meant to fold them when inlining is done.
> On the following testcase it doesn't fold some of them though.
> The problem is that it wants to scan only newly added basic blocks (i.e.
> those created during the inlining), but the way it is written only works if
> there are no gaps in the basic_block vector. If there are, it can fold
> stmts only in some of the basic blocks or none of them.
> Fixed thusly, bootstrapped/regtested on x86_64-linux and i686-linux, ok for
> 2018-12-13 Jakub Jelinek <email@example.com>
> PR tree-optimization/88444
> * tree-inline.c (fold_marked_statements): Iterate up to
> last_basic_block_for_fn rather than n_basic_blocks_for_fn.
> * gcc.dg/tree-ssa/pr88444.c: New test.