(dbxout_parms): For parameters in registers, if use

DECL_RTL, then must use TREE_TYPE instead of DECL_ARG_TYPE.

From-SVN: r5291

diff --git a/gcc/dbxout.c b/gcc/dbxout.c
index 8e8c08ae26dae4651f24aa7da7f9fe14444e3e0d..94f6d4460b26aa612cafac058ee24ad3f137b360 100644 (file)
--- a/gcc/dbxout.c
+++ b/gcc/dbxout.c
@@ -2065,6 +2065,7 @@ dbxout_parms (parms)
          {
            rtx best_rtl;
            char regparm_letter;
+           tree parm_type;
            /* Parm passed in registers and lives in registers or nowhere.  */
 
            current_sym_code = DBX_REGPARM_STABS_CODE;
@@ -2074,14 +2075,23 @@ dbxout_parms (parms)
            /* If parm lives in a register, use that register;
               pretend the parm was passed there.  It would be more consistent
               to describe the register where the parm was passed,
-              but in practice that register usually holds something else.  */
+              but in practice that register usually holds something else.
+
+              If we use DECL_RTL, then we must use the declared type of
+              the variable, not the type that it arrived in.  */
            if (REGNO (DECL_RTL (parms)) >= 0
                && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
-             best_rtl = DECL_RTL (parms);
+             {
+               best_rtl = DECL_RTL (parms);
+               parm_type = TREE_TYPE (parms);
+             }
            /* If the parm lives nowhere,
               use the register where it was passed.  */
            else
-             best_rtl = DECL_INCOMING_RTL (parms);
+             {
+               best_rtl = DECL_INCOMING_RTL (parms);
+               parm_type = DECL_ARG_TYPE (parms);
+             }
            current_sym_value = DBX_REGISTER_NUMBER (REGNO (best_rtl));
 
            FORCE_TEXT;
@@ -2099,7 +2109,7 @@ dbxout_parms (parms)
                         regparm_letter);
              }
 
-           dbxout_type (DECL_ARG_TYPE (parms), 0, 0);
+           dbxout_type (parm_type, 0, 0);
            dbxout_finish_symbol (parms);
          }
        else if (GET_CODE (DECL_RTL (parms)) == MEM