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Re: Pessimization in doloop

This is the complete patch.

pls let me know if ok.


2006-09-16 Andreas Tobler <>

	* loop-doloop.c (doloop_optimize): Change type of max_cost to int.
	Add forgotten parameter to the fprintf call.

Index: gcc/loop-doloop.c
--- gcc/loop-doloop.c   (revision 116981)
+++ gcc/loop-doloop.c   (working copy)
@@ -1,5 +1,5 @@
 /* Perform doloop optimizations
-   Copyright (C) 2004, 2005 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
    Based on code by Michael P. Hayes (

This file is part of GCC.
@@ -484,7 +484,8 @@
rtx iterations_max;
rtx start_label;
rtx condition;
- unsigned level, est_niter, max_cost;
+ unsigned level, est_niter;
+ int max_cost;
struct niter_desc *desc;
unsigned word_mode_size;
unsigned HOST_WIDE_INT word_mode_max;
@@ -531,7 +532,7 @@
if (dump_file)
fprintf (dump_file,
- "Doloop: number of iterations too costly to compute.\n",
+ "Doloop: number of iterations (%u) too costly to compute.\n",
return false;

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