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From-SVN: r1279
This commit is contained in:
Richard Kenner 1992-06-24 19:14:43 -04:00
parent 5959a6cddf
commit 08af8e094f
1 changed files with 10 additions and 4 deletions
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14
gcc/expr.c
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@ -5927,11 +5927,14 @@ do_jump (exp, if_false_label, if_true_label)
combine can't do this for us because it can't know whether a
ZERO_EXTRACT or a compare in a smaller mode exists, but we do. */
if (TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST
if (! SLOW_BYTE_ACCESS
&& TREE_CODE (TREE_OPERAND (exp, 1)) == INTEGER_CST
&& TYPE_PRECISION (TREE_TYPE (exp)) <= HOST_BITS_PER_INT
&& (i = floor_log2 (TREE_INT_CST_LOW (TREE_OPERAND (exp, 1)))) >= 0
&& (type = type_for_size (i + 1, 1)) != 0
&& TYPE_PRECISION (type) < TYPE_PRECISION (TREE_TYPE (exp)))
&& TYPE_PRECISION (type) < TYPE_PRECISION (TREE_TYPE (exp))
&& (cmp_optab->handlers[(int) TYPE_MODE (type)].insn_code
!= CODE_FOR_nothing))
{
do_jump (convert (type, exp), if_false_label, if_true_label);
break;
@ -5980,8 +5983,11 @@ do_jump (exp, if_false_label, if_true_label)
&mode, &unsignedp, &volatilep);
type = type_for_size (bitsize, unsignedp);
if (type != 0 && bitsize >= 0
&& TYPE_PRECISION (type) < TYPE_PRECISION (TREE_TYPE (exp)))
if (! SLOW_BYTE_ACCESS
&& type != 0 && bitsize >= 0
&& TYPE_PRECISION (type) < TYPE_PRECISION (TREE_TYPE (exp))
&& (cmp_optab->handlers[(int) TYPE_MODE (type)].insn_code
!= CODE_FOR_nothing))
{
do_jump (convert (type, exp), if_false_label, if_true_label);
break;