From: Richard Stallman <rms@gnu.org>
Date: Fri, 4 Jun 1993 00:45:44 +0000 (+0000)
Subject: (num_sign_bit_copies): At end, return 1 if NONZERO has the high bit set.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=df6f4086b07f8ffe4cc6dd90cc21056d2cd54d86;p=gcc.git

(num_sign_bit_copies): At end, return 1 if NONZERO has the high bit set.

From-SVN: r4627
---

diff --git a/gcc/combine.c b/gcc/combine.c
index 5ac961f184c..7aa534879f5 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -6801,7 +6801,7 @@ num_sign_bit_copies (x, mode)
     return 1;
 
   nonzero = nonzero_bits (x, mode);
-  return (nonzero == GET_MODE_MASK (mode)
+  return (nonzero & ((HOST_WIDE_INT) 1 << (bitwidth - 1))
 	  ? 1 : bitwidth - floor_log2 (nonzero) - 1);
 }