[gcc(refs/users/marxin/heads/marxin-gcc-benchmark-branch)] [Fortran] ICE: Invalid expression in gfc_element_size PR93601

[Martin Liska]

https://gcc.gnu.org/g:23d3f25c87d307536f7e0f15e211968a87657602

commit 23d3f25c87d307536f7e0f15e211968a87657602
Author: Mark Eggleston <markeggleston@gcc.gnu.org>
Date:   Tue Feb 18 14:15:41 2020 +0000

    [Fortran] ICE: Invalid expression in gfc_element_size PR93601
    
    ICE occurs when assigning a BOZ constant to an class(*) variable
    with the allocatable attribute. Use of BOZ constants outside
    data statements and int/real/dble/cmplx intrinsics is not allowed.
    
    Original patch provided by Steven G. Kargl  <kargl@gcc.gnu.org>.
    
    gcc/fortran/ChangeLog
    
            PR fortran/93601
            * match.c (gfc_match_assignment) : Reject assignment if
            the lhs stype is BT_CLASS and the rhs type is BT_BOZ.
    
    gcc/testsuite/ChangeLog
    
            PR fortran/93601
            * gfortran.dg/pr93601.f90 : New test.

Diff:
---
 gcc/fortran/ChangeLog                 |  6 ++++++
 gcc/fortran/match.c                   | 10 ++++++++++
 gcc/testsuite/ChangeLog               |  5 +++++
 gcc/testsuite/gfortran.dg/pr93601.f90 |  7 +++++++
 4 files changed, 28 insertions(+)

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index 2e874b83c64..5daaefdee9b 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,9 @@
+2020-02-18  Steven G. Kargl  <kargl@gcc.gnu.org>
+
+	PR fortran/93601
+	* match.c (gfc_match_assignment) : Reject assignment if
+	the lhs stype is BT_CLASS and the rhs type is BT_BOZ.
+
 2020-02-18  Steven G. Kargl  <kargl@gcc.gnu.org>
 
 	PR fortran/93603
diff --git a/gcc/fortran/match.c b/gcc/fortran/match.c
index 9c2ec41c49c..e4d52245976 100644
--- a/gcc/fortran/match.c
+++ b/gcc/fortran/match.c
@@ -1348,6 +1348,16 @@ gfc_match_assignment (void)
   rvalue = NULL;
   m = gfc_match (" %e%t", &rvalue);
 
+  if (m == MATCH_YES
+      && rvalue->ts.type == BT_BOZ
+      && lvalue->ts.type == BT_CLASS)
+    {
+      m = MATCH_ERROR;
+      gfc_error ("BOZ literal constant at %L is neither a DATA statement "
+		 "value nor an actual argument of INT/REAL/DBLE/CMPLX "
+		 "intrinsic subprogram", &rvalue->where);
+    }
+
   if (lvalue->expr_type == EXPR_CONSTANT)
     {
       /* This clobbers %len and %kind.  */
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 9f7a4f7a61d..6b008fde202 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2020-02-18  Mark Eggleston  <mark.eggleston@codethink.com>
+
+	PR fortran/93601
+	* gfortran.dg/pr93601.f90 : New test.
+
 2020-02-18  Martin Liska  <mliska@suse.cz>
 
 	PR ipa/93583
diff --git a/gcc/testsuite/gfortran.dg/pr93601.f90 b/gcc/testsuite/gfortran.dg/pr93601.f90
new file mode 100644
index 00000000000..495447c637b
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/pr93601.f90
@@ -0,0 +1,7 @@
+! { dg-do compile }
+
+program p
+   class(*), allocatable :: z
+   z = z'1' ! { dg-error "BOZ literal constant at" }
+end
+