[Patch, fortran] PR fortran/100245 - ICE on automatic reallocation

[Patch, fortran] PR fortran/100245 - ICE on automatic reallocation

[José Rui Faustino de Sousa]

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Hi All!

Proposed patch to:

PR100245 - ICE on automatic reallocation.

Patch tested only on x86_64-pc-linux-gnu.

Add an if clause for handling derived types in the left hand side.

Thank you very much.

Best regards,
José Rui

Fortran: Fix ICE with automatic reallocation [PR100136]

gcc/fortran/ChangeLog:

	PR fortran/100245
	* trans-expr.c (trans_class_assignment): Add if clause to handle
	derived type in the LHS.

gcc/testsuite/ChangeLog:

	PR fortran/100245
	* gfortran.dg/PR100245.f90: New test.


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diff --git a/gcc/fortran/trans-expr.c b/gcc/fortran/trans-expr.c
index 213f32b0a67..faced471918 100644
--- a/gcc/fortran/trans-expr.c
+++ b/gcc/fortran/trans-expr.c
@@ -10995,6 +10995,9 @@ trans_class_assignment (stmtblock_t *block, gfc_expr *lhs, gfc_expr *rhs,
       class_han = GFC_CLASS_TYPE_P (TREE_TYPE (lse->expr))
 	  ? gfc_class_data_get (lse->expr) : lse->expr;
 
+      if (!POINTER_TYPE_P (TREE_TYPE (class_han)))
+	class_han = gfc_build_addr_expr (NULL_TREE, class_han);
+      
       /* Allocate block.  */
       gfc_init_block (&alloc);
       gfc_allocate_using_malloc (&alloc, class_han, size, NULL_TREE);
diff --git a/gcc/testsuite/gfortran.dg/PR100245.f90 b/gcc/testsuite/gfortran.dg/PR100245.f90
new file mode 100644
index 00000000000..1fc372a0d67
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/PR100245.f90
@@ -0,0 +1,29 @@
+! { dg-do run }
+!
+! Test the fix for PR100245
+!
+
+program main_p
+
+  implicit none
+
+  type :: foo_t
+    integer :: a
+  end type foo_t
+
+  integer, parameter :: a = 42
+  
+  class(foo_t), allocatable :: val
+  class(foo_t), allocatable :: rs1
+  type(foo_t),  allocatable :: rs2
+
+  allocate(val, source=foo_t(42))
+  if (val%a/=a) stop 1
+  rs1 = val
+  if (rs1%a/=a) stop 2
+  rs2 = val
+  if (rs2%a/=a) stop 3
+  deallocate(val, rs1, rs2)
+  stop
+
+end program main_p