(output_arg_descriptor): Do not stop searching if a USE

[pf3gnuchains/gcc-fork.git] / gcc / config / pa / pa.c

diff --git a/gcc/config/pa/pa.c b/gcc/config/pa/pa.c
index 83590e5..239d8ce 100644 (file)
--- a/gcc/config/pa/pa.c
+++ b/gcc/config/pa/pa.c
@@ -3205,10 +3205,24 @@ output_arg_descriptor (insn)
   for (prev_insn = PREV_INSN (insn); GET_CODE (prev_insn) == INSN;
        prev_insn = PREV_INSN (prev_insn))
     {
-      if (!(GET_CODE (PATTERN (prev_insn)) == USE &&
-           GET_CODE (XEXP (PATTERN (prev_insn), 0)) == REG &&
-           FUNCTION_ARG_REGNO_P (REGNO (XEXP (PATTERN (prev_insn), 0)))))
+      /* Terminate search for arguments if a non-USE insn is encountered
+        or a USE insn which does not specify an argument, STATIC_CHAIN,
+        or STRUCT_VALUE register.  */
+      if (!(GET_CODE (PATTERN (prev_insn)) == USE
+           && GET_CODE (XEXP (PATTERN (prev_insn), 0)) == REG
+           && (FUNCTION_ARG_REGNO_P (REGNO (XEXP (PATTERN (prev_insn), 0)))
+               || REGNO (XEXP (PATTERN (prev_insn), 0)) == STATIC_CHAIN_REGNUM
+               || REGNO (XEXP (PATTERN (prev_insn), 0))
+               == STRUCT_VALUE_REGNUM)))
        break;
+
+      /* If this is a USE for the STATIC_CHAIN or STRUCT_VALUE register,
+        then skip it and continue the loop since those are not encoded
+        in the argument relocation bits.  */
+      if (REGNO (XEXP (PATTERN (prev_insn), 0)) == STATIC_CHAIN_REGNUM
+         || REGNO (XEXP (PATTERN (prev_insn), 0)) == STRUCT_VALUE_REGNUM)
+       continue;
+
       arg_mode = GET_MODE (XEXP (PATTERN (prev_insn), 0));
       regno = REGNO (XEXP (PATTERN (prev_insn), 0));
       if (regno >= 23 && regno <= 26)