[Bug fortran/49755] ALLOCATE with STAT= produces invalid code for already allocated vars

["dcarrera at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49755

--- Comment #1 from dcarrera at gcc dot gnu.org 2011-07-27 10:10:10 UTC ---
Author: dcarrera
Date: Wed Jul 27 10:10:06 2011
New Revision: 176822

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=176822
Log:
2011-07-26  Daniel Carrera  <dcarrera@gmail.com>

    PR fortran/49755
    * trans.c (gfc_allocate_using_malloc): Change function signature.
    Return nothing. New parameter "pointer". Eliminate temorary variables.
    (gfc_allocate_using_lib): Ditto.
    (gfc_allocate_allocatable): Ditto. Update call to gfc_allocate_using_lib
    and gfc_allocate_using_malloc. Do not free and then reallocate a
    variable that is already allocated.
    (gfc_likely): New function. Basedon gfc_unlikely.
    * trans-array.c (gfc_array_init_size): New parameter "descriptor_block".
    Instructions to modify the array descriptor are stored in this block
    while other instructions continue to be stored in "pblock".
    (gfc_array_allocate): Update call to gfc_array_init_size. Move the
    descriptor_block so that the array descriptor is only updated if
    the array was allocated successfully.
    Update calls to gfc_allocate_allocatable and gfc_allocate_using_malloc.
    * trans.h (gfc_allocate_allocatable): Change function signature.
    Function now returns void.
    (gfc_allocate_using_lib): Ditto, and new function parameter.
    (gfc_allocate_using_malloc): Ditto.
    * trans-openmp.c (gfc_omp_clause_default_ctor,
    gfc_omp_clause_copy_ctor,gfc_trans_omp_array_reduction): Replace a call
    to gfc_allocate_allocatable with gfc_allocate_using_malloc.
    * trans-stmt.c (gfc_trans_allocate): Update function calls for
    gfc_allocate_allocatable and gfc_allocate_using_malloc.



2011-07-26  Daniel Carrera  <dcarrera@gmail.com>

    PR fortran/49755
    * gfortran.dg/multiple_allocation_1.f90: Fix test. Allocating an
    allocated array should *not* change its size.
    * gfortran.dg/multiple_allocation_3.f90: New test.

Added:
    trunk/gcc/testsuite/gfortran.dg/multiple_allocation_3.f90
Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/trans-array.c
    trunk/gcc/fortran/trans-openmp.c
    trunk/gcc/fortran/trans-stmt.c
    trunk/gcc/fortran/trans.c
    trunk/gcc/fortran/trans.h
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gfortran.dg/multiple_allocation_1.f90