[gcc r12-5635] Fortran: error recovery when simplifying MINLOC/MAXLOC

[Harald Anlauf <anlauf@gcc.gnu.org>]

https://gcc.gnu.org/g:36421e76a7150621f2a5c7060ddd3f80aa825a40

commit r12-5635-g36421e76a7150621f2a5c7060ddd3f80aa825a40
Author: Harald Anlauf <anlauf@gmx.de>
Date:   Mon Nov 29 22:56:30 2021 +0100

    Fortran: error recovery when simplifying MINLOC/MAXLOC
    
    gcc/fortran/ChangeLog:
    
            PR fortran/103473
            * simplify.c (simplify_minmaxloc_nodim): Avoid NULL pointer
            dereference when shape is not set.
    
    gcc/testsuite/ChangeLog:
    
            PR fortran/103473
            * gfortran.dg/minmaxloc_15.f90: New test.

Diff:
---
 gcc/fortran/simplify.c                     |  3 +++
 gcc/testsuite/gfortran.dg/minmaxloc_15.f90 | 11 +++++++++++
 2 files changed, 14 insertions(+)

diff --git a/gcc/fortran/simplify.c b/gcc/fortran/simplify.c
index c9e13b59da9..fb7b7814603 100644
--- a/gcc/fortran/simplify.c
+++ b/gcc/fortran/simplify.c
@@ -5280,6 +5280,9 @@ simplify_minmaxloc_nodim (gfc_expr *result, gfc_expr *extremum,
       && !mask->value.logical)
     goto finish;
 
+  if (array->shape == NULL)
+    goto finish;
+
   for (i = 0; i < array->rank; i++)
     {
       count[i] = 0;
diff --git a/gcc/testsuite/gfortran.dg/minmaxloc_15.f90 b/gcc/testsuite/gfortran.dg/minmaxloc_15.f90
new file mode 100644
index 00000000000..e4eba3501d5
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/minmaxloc_15.f90
@@ -0,0 +1,11 @@
+! { dg-do compile }
+! PR fortran/103473 - ICE in simplify_minmaxloc_nodim
+! Test case by Gerhard Steinmetz.
+
+subroutine s
+  implicit none
+  integer, parameter :: a(+'1') = [1] ! { dg-error "unary numeric operator" }
+  print *, minloc (a)
+end
+
+! { dg-prune-output "Parameter array" }