fixed-value.c (do_fixed_add): Add comment.

2008-12-09  Andrew Haley  <aph@redhat.com>

	* fixed-value.c (do_fixed_add): Add comment.
	* tree-ssa-loop-ivopts.c (iv_ca_cost): Likewise.
	* builtins.c (fold_builtin_sqrt): Likewise.

From-SVN: r142589

gcc/ChangeLog

+2008-12-09  Andrew Haley  <aph@redhat.com>
+
+	* fixed-value.c (do_fixed_add): Add comment.
+	* tree-ssa-loop-ivopts.c (iv_ca_cost): Likewise.
+	* builtins.c (fold_builtin_sqrt): Likewise.
+
 2008-12-09  Kai Tietz  <kai.tietz@onevision.com>
 
 	PR/38366

gcc/builtins.c

@@ -7681,6 +7681,8 @@ fold_builtin_sqrt (tree arg, tree type)
 	  tree arg0 = CALL_EXPR_ARG (arg, 0);
 	  tree tree_root;
 	  /* The inner root was either sqrt or cbrt.  */
+	  /* This was a conditional expression but it triggered a bug
+	     in the Solaris 8 compiler.  */
 	  REAL_VALUE_TYPE dconstroot;
 	  if (BUILTIN_SQRT_P (fcode))
 	    dconstroot = dconsthalf;

gcc/fixed-value.c

@@ -295,6 +295,8 @@ do_fixed_add (FIXED_VALUE_TYPE *f, const FIXED_VALUE_TYPE *a,
   double_int temp;
   int i_f_bits;
 
+  /* This was a conditional expression but it triggered a bug in the
+     Solaris 8 compiler.  */
   if (subtract_p)
     temp = double_int_neg (b->data);
   else

gcc/tree-ssa-loop-ivopts.c

@@ -4355,6 +4355,8 @@ iv_ca_add_use (struct ivopts_data *data, struct iv_ca *ivs,
 static comp_cost
 iv_ca_cost (struct iv_ca *ivs)
 {
+  /* This was a conditional expression but it triggered a bug in the
+     Solaris 8 compiler.  */
   if (ivs->bad_uses)
     return infinite_cost;
   else