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

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From-SVN: r2002
This commit is contained in:
Richard Stallman 1992-08-31 08:02:58 +00:00
parent 8c2bf92af1
commit 812dd8a30d
1 changed files with 3 additions and 1 deletions
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4
gcc/fold-const.c
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@ -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);