From 812dd8a30d0b036bffca9780cfdef45d934d8558 Mon Sep 17 00:00:00 2001 From: Richard Stallman Date: Mon, 31 Aug 1992 08:02:58 +0000 Subject: [PATCH] (const_binop): Delete special case for mult by 3. From-SVN: r2002 --- gcc/fold-const.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) 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); -- 2.30.2