re PR fortran/53691 (ICE with -Wsurprising in LAPACK 3.4.1 cgbrfsx.f)

2012-06-17  Tobias Burnus  <burnus@net-b.de>

        PR fortran/53691
        PR fortran/53685
        * check.c (gfc_calculate_transfer_sizes): Return if
        SIZE= is not constant or source-size cannot be determined.

2012-06-17  Tobias Burnus  <burnus@net-b.de>

        PR fortran/53691
        PR fortran/53685
        * gfortran.dg/transfer_check_3.f90: New.

From-SVN: r188708

gcc/fortran/ChangeLog

+2012-06-17  Tobias Burnus  <burnus@net-b.de>
+
+	PR fortran/53691
+	PR fortran/53685
+	* check.c (gfc_calculate_transfer_sizes): Return if
+	SIZE= is not constant or source-size cannot be determined.
+
 2012-06-16  Tobias Burnus  <burnus@net-b.de>
 
 	PR fortran/53642

gcc/fortran/check.c

@@ -3986,7 +3986,6 @@ gfc_try
 gfc_calculate_transfer_sizes (gfc_expr *source, gfc_expr *mold, gfc_expr *size,
 			      size_t *source_size, size_t *result_size,
 			      size_t *result_length_p)
-
 {
   size_t result_elt_size;
   mpz_t tmp;
@@ -3995,12 +3994,17 @@ gfc_calculate_transfer_sizes (gfc_expr *source, gfc_expr *mold, gfc_expr *size,
   if (source->expr_type == EXPR_FUNCTION)
     return FAILURE;
 
-    /* Calculate the size of the source.  */
+  if (size && size->expr_type != EXPR_CONSTANT)
+    return FAILURE;
+
+  /* Calculate the size of the source.  */
   if (source->expr_type == EXPR_ARRAY
       && gfc_array_size (source, &tmp) == FAILURE)
     return FAILURE;
 
   *source_size = gfc_target_expr_size (source);
+  if (*source_size == 0)
+    return FAILURE;
 
   mold_element = mold->expr_type == EXPR_ARRAY
 		 ? gfc_constructor_first (mold->value.constructor)->expr

gcc/testsuite/ChangeLog

+2012-06-17  Tobias Burnus  <burnus@net-b.de>
+
+	PR fortran/53691
+	PR fortran/53685
+	* gfortran.dg/transfer_check_3.f90: New.
+
 2012-06-06  Uros Bizjak  <ubizjak@gmail.com>
 
 	* gcc.dg/tree-ssa/vrp68.c: Fix scan-tree-dump-times argument order.

gcc/testsuite/gfortran.dg/transfer_check_3.f90

+! { dg-do compile }
+! { dg-options "-Wsurprising" }
+!
+! PR fortran/53691
+! PR fortran/53685
+!
+! TRANSFER checks
+
+
+! (a) PR 53691
+! Failed for -Wsurprising with an ICE as SIZE was assumed to be constant
+
+       SUBROUTINE CGBRFSX(N, RWORK)
+         INTEGER N
+         REAL RWORK(*)
+         REAL ZERO
+         PARAMETER (ZERO = 0.0E+0)
+         call foo(TRANSFER (RWORK(1:2*N), (/ (ZERO, ZERO) /), N))
+       end
+
+! (b) PR 53685
+! Failed with a bogus size warning if the source's size is not known at compile
+! time (for substrings, the length wasn't set)
+
+      subroutine test(j)
+        implicit none
+        character(len=4) :: record_type
+        integer          :: i, j
+
+        i = transfer (record_type, i)      ! no warning
+        i = transfer (record_type(1:4), i) ! gave a warning
+        i = transfer (record_type(1:j), i) ! gave a warning
+      end