From: Jim Wilson <wilson@gcc.gnu.org>
Date: Thu, 23 May 1996 23:53:39 +0000 (-0700)
Subject: (set_nonzero_bits_and_sign_copies): Set
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=88306d12bb3131654511eb2e369626dd2e9d1a70;p=gcc.git

(set_nonzero_bits_and_sign_copies): Set
reg_sign_bit_copies to one not zero to indicate that the value
is unknown.

From-SVN: r12086
---

diff --git a/gcc/combine.c b/gcc/combine.c
index 7ba5c9a2ba6..9427060d9c6 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -737,7 +737,7 @@ set_nonzero_bits_and_sign_copies (x, set)
       if (set == 0 || GET_CODE (set) == CLOBBER)
 	{
 	  reg_nonzero_bits[REGNO (x)] = GET_MODE_MASK (GET_MODE (x));
-	  reg_sign_bit_copies[REGNO (x)] = 0;
+	  reg_sign_bit_copies[REGNO (x)] = 1;
 	  return;
 	}
 
@@ -787,7 +787,7 @@ set_nonzero_bits_and_sign_copies (x, set)
       else
 	{
 	  reg_nonzero_bits[REGNO (x)] = GET_MODE_MASK (GET_MODE (x));
-	  reg_sign_bit_copies[REGNO (x)] = 0;
+	  reg_sign_bit_copies[REGNO (x)] = 1;
 	}
     }
 }