[gcc r11-10504] Fortran: avoid ICE on invalid array subscript triplets [PR108501]

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

https://gcc.gnu.org/g:76a6f8470c8c786b271cb0d897de891fe0d4043f

commit r11-10504-g76a6f8470c8c786b271cb0d897de891fe0d4043f
Author: Harald Anlauf <anlauf@gmx.de>
Date:   Mon Jan 23 21:19:03 2023 +0100

    Fortran: avoid ICE on invalid array subscript triplets [PR108501]
    
    gcc/fortran/ChangeLog:
    
            PR fortran/108501
            * interface.c (get_expr_storage_size): Check array subscript triplets
            that we actually have integer values before trying to extract with
            mpz_get_si.
    
    gcc/testsuite/ChangeLog:
    
            PR fortran/108501
            * gfortran.dg/pr108501.f90: New test.
    
    (cherry picked from commit 771d793df1622a476e1cf8d05f0a6aee350fa56b)

Diff:
---
 gcc/fortran/interface.c                | 23 ++++++++++++++++-------
 gcc/testsuite/gfortran.dg/pr108501.f90 | 14 ++++++++++++++
 2 files changed, 30 insertions(+), 7 deletions(-)

diff --git a/gcc/fortran/interface.c b/gcc/fortran/interface.c
index efb1257fac2..150f3def319 100644
--- a/gcc/fortran/interface.c
+++ b/gcc/fortran/interface.c
@@ -2863,7 +2863,8 @@ get_expr_storage_size (gfc_expr *e)
 
 	    if (ref->u.ar.stride[i])
 	      {
-		if (ref->u.ar.stride[i]->expr_type == EXPR_CONSTANT)
+		if (ref->u.ar.stride[i]->expr_type == EXPR_CONSTANT
+		    && ref->u.ar.stride[i]->ts.type == BT_INTEGER)
 		  stride = mpz_get_si (ref->u.ar.stride[i]->value.integer);
 		else
 		  return 0;
@@ -2871,26 +2872,30 @@ get_expr_storage_size (gfc_expr *e)
 
 	    if (ref->u.ar.start[i])
 	      {
-		if (ref->u.ar.start[i]->expr_type == EXPR_CONSTANT)
+		if (ref->u.ar.start[i]->expr_type == EXPR_CONSTANT
+		    && ref->u.ar.start[i]->ts.type == BT_INTEGER)
 		  start = mpz_get_si (ref->u.ar.start[i]->value.integer);
 		else
 		  return 0;
 	      }
 	    else if (ref->u.ar.as->lower[i]
-		     && ref->u.ar.as->lower[i]->expr_type == EXPR_CONSTANT)
+		     && ref->u.ar.as->lower[i]->expr_type == EXPR_CONSTANT
+		     && ref->u.ar.as->lower[i]->ts.type == BT_INTEGER)
 	      start = mpz_get_si (ref->u.ar.as->lower[i]->value.integer);
 	    else
 	      return 0;
 
 	    if (ref->u.ar.end[i])
 	      {
-		if (ref->u.ar.end[i]->expr_type == EXPR_CONSTANT)
+		if (ref->u.ar.end[i]->expr_type == EXPR_CONSTANT
+		    && ref->u.ar.end[i]->ts.type == BT_INTEGER)
 		  end = mpz_get_si (ref->u.ar.end[i]->value.integer);
 		else
 		  return 0;
 	      }
 	    else if (ref->u.ar.as->upper[i]
-		     && ref->u.ar.as->upper[i]->expr_type == EXPR_CONSTANT)
+		     && ref->u.ar.as->upper[i]->expr_type == EXPR_CONSTANT
+		     && ref->u.ar.as->upper[i]->ts.type == BT_INTEGER)
 	      end = mpz_get_si (ref->u.ar.as->upper[i]->value.integer);
 	    else
 	      return 0;
@@ -2931,7 +2936,9 @@ get_expr_storage_size (gfc_expr *e)
 		  || ref->u.ar.as->upper[i] == NULL
 		  || ref->u.ar.as->lower[i] == NULL
 		  || ref->u.ar.as->upper[i]->expr_type != EXPR_CONSTANT
-		  || ref->u.ar.as->lower[i]->expr_type != EXPR_CONSTANT)
+		  || ref->u.ar.as->lower[i]->expr_type != EXPR_CONSTANT
+		  || ref->u.ar.as->upper[i]->ts.type != BT_INTEGER
+		  || ref->u.ar.as->lower[i]->ts.type != BT_INTEGER)
 		return 0;
 
 	      elements
@@ -2953,7 +2960,9 @@ get_expr_storage_size (gfc_expr *e)
 	    {
 	      if (!as->upper[i] || !as->lower[i]
 		  || as->upper[i]->expr_type != EXPR_CONSTANT
-		  || as->lower[i]->expr_type != EXPR_CONSTANT)
+		  || as->lower[i]->expr_type != EXPR_CONSTANT
+		  || as->upper[i]->ts.type != BT_INTEGER
+		  || as->lower[i]->ts.type != BT_INTEGER)
 		return 0;
 
 	      elements = elements
diff --git a/gcc/testsuite/gfortran.dg/pr108501.f90 b/gcc/testsuite/gfortran.dg/pr108501.f90
new file mode 100644
index 00000000000..09ab8c9f34f
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr108501.f90
@@ -0,0 +1,14 @@
+! { dg-do compile }
+! PR fortran/108501 - ICE in get_expr_storage_size
+! Contributed by G.Steinmetz
+
+program p
+  real, parameter :: n = 2
+  real :: a(1,(n),2) ! { dg-error "must be of INTEGER type" }
+  call s(a(:,:,1))
+end
+subroutine s(x)
+  real :: x(2)
+end
+
+! { dg-prune-output "must have constant shape" }