From: Richard Kenner <kenner@gcc.gnu.org>
Date: Mon, 13 Apr 1992 11:19:34 +0000 (-0400)
Subject: *** empty log message ***
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1a5b457d5730b4f83540da3a814c5909d9ada14b;p=gcc.git

*** empty log message ***

From-SVN: r733
---

diff --git a/gcc/cccp.c b/gcc/cccp.c
index 979ad89f5ee..eb974de75dc 100644
--- a/gcc/cccp.c
+++ b/gcc/cccp.c
@@ -3318,6 +3318,8 @@ handle_directive (ip, op)
 		*cp++ = *xp++;
 		SKIP_WHITE_SPACE (xp);
 	      }
+	    } else {
+	      *cp++ = *xp++;
 	    }
 	    break;
 
@@ -3325,7 +3327,7 @@ handle_directive (ip, op)
 	  case '\"':
 	    {
 	      register U_CHAR *bp1
-		= skip_quoted_string (xp - 1, limit, ip->lineno, 0, 0, 0);
+		= skip_quoted_string (xp - 1, bp, ip->lineno, 0, 0, 0);
 	      while (xp != bp1)
 		if (*xp == '\\') {
 		  if (*++xp != '\n')
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index 82160f54cd1..ef3aeb91ca2 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -529,13 +529,36 @@ gen_lowpart_common (mode, x)
      from the low-order part of the constant.  */
   else if (GET_MODE_CLASS (mode) == MODE_INT && GET_MODE (x) == VOIDmode
 	   && (GET_CODE (x) == CONST_INT || GET_CODE (x) == CONST_DOUBLE))
-    return (GET_MODE_BITSIZE (mode) > HOST_BITS_PER_INT ? x
-	    : (GET_MODE_BITSIZE (mode) == HOST_BITS_PER_INT
-	       && GET_CODE (x) == CONST_INT) ? x
-	    : gen_rtx (CONST_INT, VOIDmode,
-		       (GET_MODE_MASK (mode)
-			& (GET_CODE (x) == CONST_INT
-			   ? INTVAL (x) : CONST_DOUBLE_LOW (x)))));
+    {
+      /* If MODE is twice the host word size, X is already the desired
+	 representation.  Otherwise, if MODE is wider than a word, we can't
+	 do this.  If MODE is exactly a word, return just one CONST_INT.
+	 If MODE is smaller than a word, clear the bits that don't belong
+	 in our mode, unless they and our sign bit are all one.  So we get
+	 either a reasonable negative value or a reasonable unsigned value
+	 for this mode.  */
+
+      if (GET_MODE_BITSIZE (mode) == 2 * HOST_BITS_PER_INT)
+	return x;
+      else if (GET_MODE_BITSIZE (mode) > HOST_BITS_PER_INT)
+	return 0;
+      else if (GET_MODE_BITSIZE (mode) == HOST_BITS_PER_INT)
+	return (GET_CODE (x) == CONST_INT ? x
+		: gen_rtx (CONST_INT, VOIDmode, CONST_DOUBLE_LOW (x)));
+      else
+	{
+	  /* MODE must be narrower than HOST_BITS_PER_INT.  */
+	  int width = GET_MODE_BITSIZE (mode);
+	  int val = (GET_CODE (x) == CONST_INT ? INTVAL (x)
+		     : CONST_DOUBLE_LOW (x));
+
+	  if (((val & ((-1) << (width - 1))) != ((-1) << (width - 1))))
+	    val &= (1 << width) - 1;
+
+	  return (GET_CODE (x) == CONST_INT && INTVAL (x) == val ? x
+		  : gen_rtx (CONST_INT, VOIDmode, val));
+	}
+    }
 
   /* Otherwise, we can't do this.  */
   return 0;