From: Thomas Koenig <tkoenig@gcc.gnu.org>
Date: Sun, 17 Mar 2019 12:54:29 +0000 (+0000)
Subject: re PR fortran/84394 (compiler error when using modules with derived types in block... 
X-Git-Tag: releases/gcc-7.5.0~533
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=41557ae3d543f6f613201bdac7bb3f6dc8476e07;p=thirdparty%2Fgcc.git

re PR fortran/84394 (compiler error when using modules with derived types in block data subprograms)

2019-03-17  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/84394
	Backport from trunk
	* symbol.c (gfc_add_subroutine): If we are encountering a
	subrtoutine within a BLOCK DATA and the name starts with an
	underscore, do not check.

2019-03-17  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/84394
	Backport from trunk
	* gfortran.dg/blockdata_11.f90: New test.

From-SVN: r269741
---

diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index 9c8df3a488ca..f2426344410c 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,11 @@
+2019-03-17  Thomas Koenig  <tkoenig@gcc.gnu.org>
+
+	PR fortran/84394
+	Backport from trunk
+	* symbol.c (gfc_add_subroutine): If we are encountering a
+	subrtoutine within a BLOCK DATA and the name starts with an
+	underscore, do not check.
+
 2019-03-16  Thomas Koenig  <tkoenig@gcc.gnu.org>
 
 	PR fortran/66089
diff --git a/gcc/fortran/symbol.c b/gcc/fortran/symbol.c
index f3ab8af5ad3e..d42f2ed5bee9 100644
--- a/gcc/fortran/symbol.c
+++ b/gcc/fortran/symbol.c
@@ -1595,7 +1595,15 @@ gfc_add_subroutine (symbol_attribute *attr, const char *name, locus *where)
     return false;
 
   attr->subroutine = 1;
-  return check_conflict (attr, name, where);
+
+  /* If we are looking at a BLOCK DATA statement and we encounter a
+     name with a leading underscore (which must be
+     compiler-generated), do not check. See PR 84394.  */
+
+  if (name && *name != '_' && gfc_current_state () != COMP_BLOCK_DATA)
+    return check_conflict (attr, name, where);
+  else
+    return true;
 }
 
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 85a261b6d719..53aaf96cc17c 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2019-03-17  Thomas Koenig  <tkoenig@gcc.gnu.org>
+
+	PR fortran/84394
+	Backport from trunk
+	* gfortran.dg/blockdata_11.f90: New test.
+
 2019-03-17  H.J. Lu  <hongjiu.lu@intel.com>
 
 	Backport from mainline
diff --git a/gcc/testsuite/gfortran.dg/blockdata_11.f90 b/gcc/testsuite/gfortran.dg/blockdata_11.f90
new file mode 100644
index 000000000000..4aee18b7c7a6
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/blockdata_11.f90
@@ -0,0 +1,33 @@
+! { dg-do run }
+! PR 84394 - this used to complain about private procedures in
+! BLOCK data.
+module mod1
+   implicit none
+   type :: type1
+      integer :: i1
+   end type type1
+end module
+
+module mod2
+   implicit none
+   contains
+      subroutine sub1
+         integer vals
+         common /block1/ vals(5)
+         if (any(vals /= [1, 2, 3, 4, 5])) stop 1
+      end subroutine
+end module
+
+block data blkdat
+  use mod1
+  integer vals
+  common /block1/ vals(5)
+  data vals/1, 2, 3, 4, 5/
+end block data blkdat
+
+program main
+  use mod2, only: sub1
+  implicit none
+  call sub1
+end program
+