gcse.c (insert_insn_end_bb): Do not search for assignments to non-argumment…

gcse.c (insert_insn_end_bb): Do not search for assignments to non-argumment registers that are mentioned in...

        * gcse.c (insert_insn_end_bb): Do not search for assignments to
        non-argumment registers that are mentioned in CALL_INSN_FUNCTION_USAGE.

From-SVN: r41976

gcc/ChangeLog

 Fri May 11 15:50:13 2001  Jeffrey A Law  (law@cygnus.com)
 
+	* gcse.c (insert_insn_end_bb): Do not search for assignments to
+	non-argumment registers that are mentioned in CALL_INSN_FUNCTION_USAGE.
+
 	* toplev.c (compile_file): Move comment for opening output
 	file to just before the code that opens the output file.
 

gcc/gcse.c

@@ -4787,6 +4787,11 @@ insert_insn_end_bb (expr, bb, pre)
 	    if (REGNO (XEXP (XEXP (p, 0), 0)) >= FIRST_PSEUDO_REGISTER)
 	      abort ();
 
+	    /* We only care about registers which can hold function
+	       arguments.  */
+	    if (! FUNCTION_ARG_REGNO_P (REGNO (XEXP (XEXP (p, 0), 0))))
+	      continue;
+
 	    SET_HARD_REG_BIT (parm_regs, REGNO (XEXP (XEXP (p, 0), 0)));
 	    nparm_regs++;
 	  }