re PR target/19704 (ICE for tail call of regparm 3 and dllimport)

	PR target/19704
	* config/i386/i386.c (ix86_function_ok_for_sibcall):  Also check
	that dllimport'd functions do not use all call-clobbered registers
	to pass parameters.

From-SVN: r94467

gcc/ChangeLog

+2005-01-31  Danny Smith  <dannysmith@users.sourceforge.net>
+
+	PR target/19704
+	* config/i386/i386.c (ix86_function_ok_for_sibcall):  Also check
+	that dllimport'd functions do not use all call-clobbered registers
+	to pass parameters.
+
 2005-01-30  Richard Henderson  <rth@redhat.com>
 
 	PR 19696

gcc/config/i386/i386.c

@@ -1678,6 +1678,13 @@ ix86_function_ok_for_sibcall (tree decl, tree exp)
 	}
     }
 
+#if TARGET_DLLIMPORT_DECL_ATTRIBUTES
+  /* Dllimport'd functions are also called indirectly.  */
+  if (decl && lookup_attribute ("dllimport", DECL_ATTRIBUTES (decl))
+      && ix86_function_regparm (TREE_TYPE (decl), NULL) >= 3)
+    return false;
+#endif
+
   /* Otherwise okay.  That also includes certain types of indirect calls.  */
   return true;
 }