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(record_jump_cond): At end, make missing equivalences 

first, and then merge them.

From-SVN: r5769
This commit is contained in:
Richard Stallman 1993-10-13 04:03:24 +00:00
parent c9646177c9
commit eb5ad42ab3
1 changed files with 9 additions and 14 deletions
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23
gcc/cse.c
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@ -5670,42 +5670,37 @@ record_jump_cond (code, mode, op0, op1, reversed_nonequality)
return;
}
/* If both are equivalent, merge the two classes. Save this class for
`cse_set_around_loop'. */
if (op0_elt && op1_elt)
{
merge_equiv_classes (op0_elt, op1_elt);
last_jump_equiv_class = op0_elt;
}
/* If either side is still missing an equivalence, make it now,
then merge the equivalences. */
/* For whichever side doesn't have an equivalence, make one. */
if (op0_elt == 0)
{
if (insert_regs (op0, op1_elt, 0))
if (insert_regs (op0, NULL_PTR, 0))
{
rehash_using_reg (op0);
op0_hash_code = HASH (op0, mode);
}
op0_elt = insert (op0, op1_elt, op0_hash_code, mode);
op0_elt = insert (op0, NULL_PTR, op0_hash_code, mode);
op0_elt->in_memory = op0_in_memory;
op0_elt->in_struct = op0_in_struct;
last_jump_equiv_class = op0_elt;
}
if (op1_elt == 0)
{
if (insert_regs (op1, op0_elt, 0))
if (insert_regs (op1, NULL_PTR, 0))
{
rehash_using_reg (op1);
op1_hash_code = HASH (op1, mode);
}
op1_elt = insert (op1, op0_elt, op1_hash_code, mode);
op1_elt = insert (op1, NULL_PTR, op1_hash_code, mode);
op1_elt->in_memory = op1_in_memory;
op1_elt->in_struct = op1_in_struct;
last_jump_equiv_class = op1_elt;
}
merge_equiv_classes (op0_elt, op1_elt);
last_jump_equiv_class = op0_elt;
}
/* CSE processing for one instruction.