From: Richard Stallman <rms@gnu.org>
Date: Mon, 31 Aug 1992 08:02:58 +0000 (+0000)
Subject: (const_binop): Delete special case for mult by 3.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=812dd8a30d0b036bffca9780cfdef45d934d8558;p=gcc.git

(const_binop): Delete special case for mult by 3.

From-SVN: r2002
---

diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index 069c503cb23..b3564de4ad4 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -1073,7 +1073,7 @@ const_binop (code, arg1, arg2)
 	  break;
 
 	case MULT_EXPR:
-  /* Optimize simple cases.  */
+	  /* Optimize simple cases.  */
 	  if (int1h == 0)
 	    {
 	      unsigned HOST_WIDE_INT temp;
@@ -1091,11 +1091,13 @@ const_binop (code, arg1, arg2)
 		  int2h = int2h * 2 + (temp < int2l);
 		  t = build_int_2 (temp, int2h);
 		  goto got_it;
+#if 0 /* This code can lose carries.  */
 		case 3:
 		  temp = int2l + int2l + int2l;
 		  int2h = int2h * 3 + (temp < int2l);
 		  t = build_int_2 (temp, int2h);
 		  goto got_it;
+#endif
 		case 4:
 		  temp = int2l + int2l;
 		  int2h = int2h * 4 + ((temp < int2l) << 1);