This patch looks for malloc/free calls that were generated by allocate statement
that is associated with allocate directive and replaces them with GOMP_alloc
and GOMP_free.

gcc/ChangeLog:

	* omp-low.cc (scan_sharing_clauses): Handle OMP_CLAUSE_ALLOCATOR.
	(scan_omp_allocate): New.
	(scan_omp_1_stmt): Call it.
	(lower_omp_allocate): New function.
	(lower_omp_1): Call it.

gcc/testsuite/ChangeLog:

	* gfortran.dg/gomp/allocate-6.f90: Add tests.
	* gfortran.dg/gomp/allocate-7.f90: New test.
	* gfortran.dg/gomp/allocate-8.f90: New test.

libgomp/ChangeLog:

	* testsuite/libgomp.fortran/allocate-2.f90: New test.
---
 gcc/omp-low.cc                                | 139 ++++++++++++++++++
 gcc/testsuite/gfortran.dg/gomp/allocate-6.f90 |   9 ++
 gcc/testsuite/gfortran.dg/gomp/allocate-7.f90 |  13 ++
 gcc/testsuite/gfortran.dg/gomp/allocate-8.f90 |  15 ++
 .../testsuite/libgomp.fortran/allocate-2.f90  |  48 ++++++
 5 files changed, 224 insertions(+)
 create mode 100644 gcc/testsuite/gfortran.dg/gomp/allocate-7.f90
 create mode 100644 gcc/testsuite/gfortran.dg/gomp/allocate-8.f90
 create mode 100644 libgomp/testsuite/libgomp.fortran/allocate-2.f90