re PR middle-end/60797 (gcc hangs with error: only weak aliases are supported in…

re PR middle-end/60797 (gcc hangs with error: only weak aliases are supported in this configuration)

2014-04-11  Richard Biener  <rguenther@suse.de>

	PR middle-end/60797
	* varasm.c (assemble_alias): Avoid endless error reporting
	recursion by setting TREE_ASM_WRITTEN.

	* gcc.dg/pr60797.c: New testcase.

From-SVN: r209299

gcc/ChangeLog

+2014-04-11  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/60797
+	* varasm.c (assemble_alias): Avoid endless error reporting
+	recursion by setting TREE_ASM_WRITTEN.
+
 2014-04-11  Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>
 
 	* config/s390/s390.md: Add a splitter for NOT rtx.

gcc/testsuite/ChangeLog

+2014-04-11  Richard Biener  <rguenther@suse.de>
+
+	PR middle-end/60797
+	* gcc.dg/pr60797.c: New testcase.
+
 2014-04-11  Andreas Krebbel  <Andreas.Krebbel@de.ibm.com>
 
 	* gcc.target/s390/htm-nofloat-1.c: Rename to ...

gcc/testsuite/gcc.dg/pr60797.c

+/* { dg-do compile } */
+/* { dg-skip-if "" { alias } } */
+
+extern int foo __attribute__((alias("bar"))); /* { dg-error "supported" } */
+int main()
+{
+  return 0;
+}

gcc/varasm.c

@@ -5665,6 +5665,7 @@ assemble_alias (tree decl, tree target)
 # if !defined(ASM_OUTPUT_WEAK_ALIAS) && !defined (ASM_WEAKEN_DECL)
       error_at (DECL_SOURCE_LOCATION (decl),
 		"alias definitions not supported in this configuration");
+      TREE_ASM_WRITTEN (decl) = 1;
       return;
 # else
       if (!DECL_WEAK (decl))
@@ -5675,6 +5676,7 @@ assemble_alias (tree decl, tree target)
 	  else
 	    error_at (DECL_SOURCE_LOCATION (decl),
 		      "only weak aliases are supported in this configuration");
+	  TREE_ASM_WRITTEN (decl) = 1;
 	  return;
 	}
 # endif