|
 |
2985e0 |
From b8527b8f03c4c50869c4f9a063f5c7686e58e5e9 Mon Sep 17 00:00:00 2001
|
|
|
2985e0 |
From: Jim MacArthur <jim.macarthur@codethink.co.uk>
|
|
|
2985e0 |
Date: Fri, 26 Aug 2016 17:46:05 +0100
|
|
|
2985e0 |
Subject: [PATCH 18/23] Fill in missing array dimensions using the lower bound
|
|
|
2985e0 |
|
|
|
2985e0 |
This feature is enabled by the `-fstd=extra-legacy` compiler flag
|
|
|
2985e0 |
---
|
|
|
2985e0 |
|
|
|
2985e0 |
|
|
|
2985e0 |
0018-Fill-in-missing-array-dimensions-using-the-lower-bou.patch
|
|
|
2985e0 |
|
|
|
2985e0 |
diff --git a/gcc/fortran/resolve.c b/gcc/fortran/resolve.c
|
|
|
2985e0 |
index a831f70..ac35357 100644
|
|
|
2985e0 |
--- a/gcc/fortran/resolve.c
|
|
|
2985e0 |
+++ b/gcc/fortran/resolve.c
|
|
|
2985e0 |
@@ -4396,6 +4396,27 @@ compare_spec_to_ref (gfc_array_ref *ar)
|
|
|
2985e0 |
if (ar->type == AR_FULL)
|
|
|
2985e0 |
return true;
|
|
|
2985e0 |
|
|
|
2985e0 |
+ if ((gfc_option.allow_std & GFC_STD_EXTRA_LEGACY)
|
|
|
2985e0 |
+ && as->rank > ar->dimen)
|
|
|
2985e0 |
+ {
|
|
|
2985e0 |
+ /* Add in the missing dimensions, assuming they are the lower bound
|
|
|
2985e0 |
+ of that dimension if not specified. */
|
|
|
2985e0 |
+ int j;
|
|
|
2985e0 |
+ gfc_warning (0, "Using the lower bound for unspecified dimensions "
|
|
|
2985e0 |
+ "in array reference at %L", &ar->where);
|
|
|
2985e0 |
+ /* Other parts of the code iterate ar->start and ar->end from 0 to
|
|
|
2985e0 |
+ ar->dimen, so it is safe to assume slots from ar->dimen upwards
|
|
|
2985e0 |
+ are unused (i.e. there are no gaps; the specified indexes are
|
|
|
2985e0 |
+ contiguous and start at zero */
|
|
|
2985e0 |
+ for(j = ar->dimen; j <= as->rank; j++)
|
|
|
2985e0 |
+ {
|
|
|
2985e0 |
+ ar->start[j] = gfc_copy_expr (as->lower[j]);
|
|
|
2985e0 |
+ ar->end[j] = gfc_copy_expr (as->lower[j]);
|
|
|
2985e0 |
+ ar->dimen_type[j] = DIMEN_ELEMENT;
|
|
|
2985e0 |
+ }
|
|
|
2985e0 |
+ ar->dimen = as->rank;
|
|
|
2985e0 |
+ }
|
|
|
2985e0 |
+
|
|
|
2985e0 |
if (as->rank != ar->dimen)
|
|
|
2985e0 |
{
|
|
|
2985e0 |
gfc_error ("Rank mismatch in array reference at %L (%d/%d)",
|
|
|
2985e0 |
diff --git a/gcc/testsuite/gfortran.dg/array_6.f90 b/gcc/testsuite/gfortran.dg/array_6.f90
|
|
|
2985e0 |
new file mode 100644
|
|
|
2985e0 |
index 0000000..20752a1
|
|
|
2985e0 |
--- /dev/null
|
|
|
2985e0 |
+++ b/gcc/testsuite/gfortran.dg/array_6.f90
|
|
|
2985e0 |
@@ -0,0 +1,13 @@
|
|
|
2985e0 |
+! { dg-do compile }
|
|
|
2985e0 |
+! { dg-options "-std=extra-legacy" }!
|
|
|
2985e0 |
+! Checks that under-specified arrays (referencing arrays with fewer
|
|
|
2985e0 |
+! dimensions than the array spec) generates a warning.
|
|
|
2985e0 |
+!
|
|
|
2985e0 |
+! Contributed by Jim MacArthur <jim.macarthur@codethink.co.uk>
|
|
|
2985e0 |
+!
|
|
|
2985e0 |
+
|
|
|
2985e0 |
+program under_specified_array
|
|
|
2985e0 |
+ INTEGER chsbrd(8,8)
|
|
|
2985e0 |
+ chsbrd(3,1) = 5
|
|
|
2985e0 |
+ print *, chsbrd(3) ! { dg-warning "Using the lower bound for unspecified dimensions in array reference" }
|
|
|
2985e0 |
+end program
|