Fortran: reject simplifying TRANSFER for MOLD with storage size 0

gcc/fortran/ChangeLog:

	PR fortran/104311
	* check.c (gfc_calculate_transfer_sizes): Checks for case when
	storage size of SOURCE is greater than zero while the storage size
	of MOLD is zero and MOLD is an array shall not depend on SIZE.

gcc/testsuite/ChangeLog:

	PR fortran/104311
	* gfortran.dg/transfer_simplify_15.f90: New test.

(cherry picked from commit 4e4252db0348a7274663a892c3a96d3ed7702aff)

diff --git a/gcc/fortran/check.c b/gcc/fortran/check.c
index df2fe1ff82861229d4bf54154a6aa98b7b655f34..44e2da65a4c984fd3d676f02f67d7dba0657536e 100644 (file)
--- a/gcc/fortran/check.c
+++ b/gcc/fortran/check.c
@@ -6126,7 +6126,7 @@ gfc_calculate_transfer_sizes (gfc_expr *source, gfc_expr *mold, gfc_expr *size,
    * representation is not shorter than that of SOURCE.
    * If SIZE is present, the result is an array of rank one and size SIZE.
    */
-  if (result_elt_size == 0 && *source_size > 0 && !size
+  if (result_elt_size == 0 && *source_size > 0
       && (mold->expr_type == EXPR_ARRAY || mold->rank))
     {
       gfc_error ("%<MOLD%> argument of %<TRANSFER%> intrinsic at %L is an "

diff --git a/gcc/testsuite/gfortran.dg/transfer_simplify_15.f90 b/gcc/testsuite/gfortran.dg/transfer_simplify_15.f90
new file mode 100644 (file)
index 0000000..cdbec97
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/transfer_simplify_15.f90
@@ -0,0 +1,11 @@
+! { dg-do compile }
+! PR fortran/104311 - ICE out of memory
+! Contributed by G.Steinmetz
+
+program p
+  type t
+  end type
+  type(t) :: x(2)
+  print *, transfer(1,x,2)       ! { dg-error "shall not have storage size 0" }
+  print *, transfer(1,x,huge(1)) ! { dg-error "shall not have storage size 0" }
+end