loop-iv.c (iv_number_of_iterations): Fix overflow check for loops that count down.

2005-08-31 Dale Johannesen <dalej@apple.com> * loop-iv.c (iv_number_of_iterations): Fix overflow check for loops that count down. From-SVN: r103689

loop-iv.c (iv_number_of_iterations): Fix overflow check for loops that count down.
2005-08-31 Dale Johannesen <dalej@apple.com> * loop-iv.c (iv_number_of_iterations): Fix overflow check for loops that count down. From-SVN: r103689
c9eb8097 · Dale Johannesen · Dale Johannesen · 9c70f610 · c9eb8097 · c9eb8097
Commit c9eb8097 authored Aug 31, 2005 by Dale Johannesen Committed by Dale Johannesen Aug 31, 2005
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gcc/loop-iv.c
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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
+2005-08-31  Dale Johannesen  <dalej@apple.com>
+
+	* loop-iv.c (iv_number_of_iterations):  Fix overflow check for
+	loops that count down.
+
 2005-08-31  Richard Henderson  <rth@redhat.com>

 	PR rtl-opt/23601

--- a/gcc/loop-iv.c
+++ b/gcc/loop-iv.c
@@ -2417,7 +2417,7 @@ iv_number_of_iterations (struct loop *loop, rtx insn, rtx condition,
 	  tmp0 = lowpart_subreg (mode, iv0.base, comp_mode);
 	  tmp1 = lowpart_subreg (mode, iv1.base, comp_mode);

-	  bound = simplify_gen_binary (MINUS, mode, mode_mmin,
+	  bound = simplify_gen_binary (PLUS, mode, mode_mmin,
 				       lowpart_subreg (mode, step, comp_mode));
 	  if (step_is_pow2)
 	    {