[Bug target/38227] gcc fails to correctly pass arguments with ms_abi function pointers

[ktietz at gcc dot gnu dot org]

------- Comment #3 from ktietz at gcc dot gnu dot org  2008-11-23 20:41 -------
Patch for this problem

Index: calls.c
===================================================================
--- calls.c     (revision 142122)
+++ calls.c     (working copy)
@@ -2077,7 +2077,7 @@
     }

 #ifdef REG_PARM_STACK_SPACE
-  reg_parm_stack_space = REG_PARM_STACK_SPACE (fndecl);
+  reg_parm_stack_space = REG_PARM_STACK_SPACE (!fndecl ? fntype : fndecl);
 #endif

   if (! OUTGOING_REG_PARM_STACK_SPACE ((!fndecl ? NULL_TREE : TREE_TYPE
(fndecl)))
Index: config/i386/i386.c
===================================================================
--- config/i386/i386.c  (revision 142122)
+++ config/i386/i386.c  (working copy)
@@ -4547,9 +4547,11 @@
   /* For libcalls it is possible that there is no fndecl at hand.
      Therefore assume for this case the default abi of the target.  */
   if (!fndecl)
-    call_abi = DEFAULT_ABI;
+    call_abi = (cfun ? cfun->machine->call_abi : DEFAULT_ABI);
+  else if (TREE_CODE (fndecl) == FUNCTION_DECL)
+    call_abi = ix86_function_abi (fndecl);
   else
-    call_abi = ix86_function_abi (fndecl);
+    call_abi = ix86_function_type_abi (fndecl);
   if (call_abi == 1)
     return 32;
   return 0;


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38227