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[PING]^2 [PATCH] Fix PRs 19431 and 21463 (if conversion with loads)

From: "Richard Guenther" <richard dot guenther at gmail dot com>
To: "Richard Guenther" <rguenther at suse dot de>
Cc: gcc-patches at gcc dot gnu dot org
Date: Tue, 10 Apr 2007 23:54:13 +0200
Subject: [PING]^2 [PATCH] Fix PRs 19431 and 21463 (if conversion with loads)

On 2/15/07, Richard Guenther <rguenther@suse.de> wrote:


This is the second attempt at solving those PRs which finally allows us
to optimize

std::max(std::min(a0, c), std::min(std::max(a1, c), b))

into a sequence of MIN/MAX exprs and get rid of the previously forced
addressable variables a0, c, a1 and b.

[...]

Ping!

Thanks,
Richard.

Bootstrapped and tested on x86_64-unknown-linux-gnu.

Ok for mainline?

2007-02-13 Richard Guenther <rguenther@suse.de>

        PR tree-optimization/19431
        PR tree-optimization/21463
        * tree-pass.h (pass_phiprop): Declare.
        * passes.c (init_optimization_passes): New phiprop pass.
        * tree-ssa-forwprop.c (struct phiprop_d): New structure.
        (phivn_valid_p): New helper function.
        (phiprop_insert_phi): Likewise.
        (propagate_with_phi): Likewise.
        (tree_ssa_phiprop): New propagator propagating loads
        through phi nodes if profitable.
        (tree_ssa_forward_propagate_single_use_va): Call it.

        * gcc.c-torture/execute/20070212-1.c: New testcase.
        * gcc.c-torture/execute/20070212-2.c: Likewise.
        * gcc.c-torture/execute/20070212-3.c: Likewise.
        * gcc.dg/tree-ssa/pr21463.c: Likewise.
        * g++.dg/tree-ssa/pr21463.C: Likewise.
        * g++.dg/tree-ssa/pr30738.C: Likewise.

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