[Bug tree-optimization/57326] Piecewise folding of operations on PHI nodes

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57326

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|---                         |7.0

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Aug 12 12:58:15 2016
New Revision: 239414

URL: https://gcc.gnu.org/viewcvs?rev=239414&root=gcc&view=rev
Log:
2016-08-12  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/57326
        * tree-ssa-pre.c (fully_constant_expression): Handle simplification
        returning an SSA name.
        (phi_translate_1): When fully_constant_expression returns a NAME
        make sure we have a leader for it.

        * gcc.dg/tree-ssa/ssa-pre-32.c: New testcase.
        * gcc.dg/tree-ssa/loadpre14.c: Adjust.
        * gcc.dg/tree-ssa/pr35287.c: Likewise.
        * gcc.target/i386/pr45685.c: Likewise.
        * gcc.dg/tree-ssa/predcom-1.c: Disable PRE.
        * gcc.dg/tree-ssa/predcom-2.c: Likewise.
        * gcc.dg/tree-ssa/predcom-3.c: Likewise.
        * gcc.dg/tree-ssa/ssa-sink-10.c: Likewise.
        * gfortran.dg/pr34163.f90: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-pre-32.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/tree-ssa/loadpre14.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr35287.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/predcom-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/predcom-2.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/predcom-3.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-sink-10.c
    trunk/gcc/testsuite/gcc.target/i386/pr45685.c
    trunk/gcc/testsuite/gfortran.dg/pr34163.f90
    trunk/gcc/tree-ssa-pre.c