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Don't store off CALL results if they're never read

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This commit is contained in:
Wolfgang Bumiller 2012-12-23 21:11:56 +01:00
parent cff74493a7
commit 3ef30e850d
1 changed files with 3 additions and 5 deletions
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8
ir.c
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@ -2564,10 +2564,6 @@ static bool ir_block_life_propagate(ir_block *self, ir_block *prev, bool *change
* (A) doesn't.
*/
tempbool = ir_value_life_merge(value, instr->eid);
/*
if (tempbool)
con_err( "value added id %s %i\n", value->name, (int)instr->eid);
*/
*changed = *changed || tempbool;
/* Then remove */
vec_remove(self->living, idx, 1);
@ -2928,7 +2924,9 @@ tailcall:
code_push_statement(&stmt, instr->context.line);
retvalue = instr->_ops[0];
if (retvalue && retvalue->store != store_return && (vec_size(retvalue->life) || retvalue->store == store_global))
if (retvalue && retvalue->store != store_return &&
(retvalue->store == store_global || (vec_size(retvalue->life) && vec_size(retvalue->reads)))
)
{
/* not to be kept in OFS_RETURN */
if (retvalue->vtype == TYPE_FIELD && OPTS_FLAG(ADJUST_VECTOR_FIELDS))