[Bug target/65576] ICE in gcc.c-torture/compile/pr33855.c

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65576

--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
git bisect pinpointed the following as the commit that introduced the ICE:

commit 2d5ee2b9035db2414ae3535db18550c1d90e52fd
Author: meissner <meissner@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Thu Mar 19 22:37:33 2015 +0000

    [gcc]
    2015-03-19  Michael Meissner  <meissner@linux.vnet.ibm.com>

        PR target/65240
        * config/rs6000/predicates.md (easy_fp_constant): Remove special
        -ffast-math handling that kept non-0 constants live in the RTL
        until reload.  Remove logic testing the number of instructions it
        took to create a constant in a GPR that was never used, due to a
        test for soft-float earlier.
        (memory_fp_constant): Delete, no longer used.

        * config/rs6000/rs6000.md (mov<MODE>_hardfloat): Remove
        alternatives for loading non-0 constants into GPRs for hard
        floating point that is no longer needed due to changes in
        easy_fp_constant.  Add support for loading 0.0 into GPRs.
        (mov<mode>_hardfloat32): Likewise.
        (mov<mode>_hardfloat64): Likewise.
        (mov<mode>_64bit_dm): Likewise.
        (movtd_64bit_nodm): Likewise.
        (pre-reload move FP constant define_split): Delete define_split,
        since it is no longer used.
        (extenddftf2_internal): Remove GHF constraints that are not valid
        for extenddftf2.

    [gcc/testsuite]
    2015-03-19  Michael Meissner  <meissner@linux.vnet.ibm.com>

        PR target/65240
        * gcc/testsuite/g++.dg/pr65240.h: Add tests for PR 65240.
        * gcc/testsuite/g++.dg/pr65240-1.C: Likewise.
        * gcc/testsuite/g++.dg/pr65240-2.C: Likewise.
        * gcc/testsuite/g++.dg/pr65240-3.C: Likewise.
        * gcc/testsuite/g++.dg/pr65240-4.C: Likewise.



    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@221524
138bc75d-0d04-0410-961f-82ee72b054a4