re PR fortran/37131 (inline matmul for small matrix sizes)

2017-05-01  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/37131
	* frontend-passes.c (inline_matmul_assign): Also check bounds
	for allocatable lhs and matrix-vector-multiplication.

2017-05-01  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/37131
	* gfortran.dg/matmul_bounds_11.f90:  New test.

From-SVN: r247441

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index c5ed5071b09e1d599a337655af5e5f0fd8dc8164..1cc78c94b037427fda77a77e8a4ea2bf620d74d1 100644 (file)
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,9 @@
+2017-05-01  Thomas Koenig  <tkoenig@gcc.gnu.org>
+
+       PR fortran/37131
+       * frontend-passes.c (inline_matmul_assign): Also check bounds
+       for allocatable lhs and matrix-vector-multiplication.
+
 2017-04-23  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
        PR fortran/80484

diff --git a/gcc/fortran/frontend-passes.c b/gcc/fortran/frontend-passes.c
index 459967d5c35b62471aecce1c0b592e985fd80b37..069ec286dd11d8f9ecebff83814054e4daff1ada 100644 (file)
--- a/gcc/fortran/frontend-passes.c
+++ b/gcc/fortran/frontend-passes.c
@@ -3066,9 +3066,10 @@ inline_matmul_assign (gfc_code **c, int *walk_subtrees,
       gfc_code *lhs_alloc;
 
       /* Only need to check a single dimension for the A2B2 case for
-        bounds checking, the rest will be allocated.  */
+        bounds checking, the rest will be allocated.  Also check this
+        for A2B1.   */
 
-      if (gfc_option.rtcheck & GFC_RTCHECK_BOUNDS && m_case == A2B2)
+      if ((gfc_option.rtcheck & GFC_RTCHECK_BOUNDS) && (m_case == A2B2 || m_case == A2B1))
        {
          gfc_code *test;
          gfc_expr *a2, *b1;

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index e0e04f354653fc425b55d01b48036174f43188b5..584eae59c681cbf6a81c8a0e8b72826178c362d8 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2017-05-01  Thomas Koenig  <tkoenig@gcc.gnu.org>
+
+       PR fortran/37131
+       * gfortran.dg/matmul_bounds_11.f90:  New test.
+
 2017-05-01  Martin Sebor  <msebor@redhat.com>
 
        PR tree-optimization/79715

diff --git a/gcc/testsuite/gfortran.dg/matmul_bounds_11.f90 b/gcc/testsuite/gfortran.dg/matmul_bounds_11.f90
new file mode 100644 (file)
index 0000000..9209760
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/matmul_bounds_11.f90
@@ -0,0 +1,15 @@
+! { dg-do run }
+! { dg-options "-O -finline-matmul-limit=30 -fcheck=all" }
+! { dg-shouldfail "Dimension of array B incorrect in MATMUL intrinsic" }
+program main
+  real, dimension(:,:), allocatable :: a
+  real, dimension(:), allocatable :: b
+  real, dimension(:), allocatable :: res
+  allocate (a(2,2), b(3))
+  call random_number(a)
+  call random_number(b)
+  res = matmul(a,b)
+  print *,res
+end program main
+! { dg-output "Fortran runtime error: Dimension of array B incorrect in MATMUL intrinsic.*" }
+