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6991577: add IfOp optimization to C1

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Ifop optimization for c1

Reviewed-by: never, phh, iveresov
This commit is contained in:
Roland Westrelin 2010-10-15 09:38:20 +02:00
parent 225a3b0eb8
commit e1a504b343
6 changed files with 246 additions and 173 deletions
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38
hotspot/src/share/vm/c1/c1_Instruction.cpp
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@ -415,28 +415,26 @@ bool Constant::is_equal(Value v) const {
return false;
}
BlockBegin* Constant::compare(Instruction::Condition cond, Value right,
BlockBegin* true_sux, BlockBegin* false_sux) {
Constant::CompareResult Constant::compare(Instruction::Condition cond, Value right) const {
Constant* rc = right->as_Constant();
// other is not a constant
if (rc == NULL) return NULL;
if (rc == NULL) return not_comparable;
ValueType* lt = type();
ValueType* rt = rc->type();
// different types
if (lt->base() != rt->base()) return NULL;
if (lt->base() != rt->base()) return not_comparable;
switch (lt->tag()) {
case intTag: {
int x = lt->as_IntConstant()->value();
int y = rt->as_IntConstant()->value();
switch (cond) {
case If::eql: return x == y ? true_sux : false_sux;
case If::neq: return x != y ? true_sux : false_sux;
case If::lss: return x < y ? true_sux : false_sux;
case If::leq: return x <= y ? true_sux : false_sux;
case If::gtr: return x > y ? true_sux : false_sux;
case If::geq: return x >= y ? true_sux : false_sux;
case If::eql: return x == y ? cond_true : cond_false;
case If::neq: return x != y ? cond_true : cond_false;
case If::lss: return x < y ? cond_true : cond_false;
case If::leq: return x <= y ? cond_true : cond_false;
case If::gtr: return x > y ? cond_true : cond_false;
case If::geq: return x >= y ? cond_true : cond_false;
}
break;
}
@ -444,12 +442,12 @@ BlockBegin* Constant::compare(Instruction::Condition cond, Value right,
jlong x = lt->as_LongConstant()->value();
jlong y = rt->as_LongConstant()->value();
switch (cond) {
case If::eql: return x == y ? true_sux : false_sux;
case If::neq: return x != y ? true_sux : false_sux;
case If::lss: return x < y ? true_sux : false_sux;
case If::leq: return x <= y ? true_sux : false_sux;
case If::gtr: return x > y ? true_sux : false_sux;
case If::geq: return x >= y ? true_sux : false_sux;
case If::eql: return x == y ? cond_true : cond_false;
case If::neq: return x != y ? cond_true : cond_false;
case If::lss: return x < y ? cond_true : cond_false;
case If::leq: return x <= y ? cond_true : cond_false;
case If::gtr: return x > y ? cond_true : cond_false;
case If::geq: return x >= y ? cond_true : cond_false;
}
break;
}
@ -459,14 +457,14 @@ BlockBegin* Constant::compare(Instruction::Condition cond, Value right,
assert(xvalue != NULL && yvalue != NULL, "not constants");
if (xvalue->is_loaded() && yvalue->is_loaded()) {
switch (cond) {
case If::eql: return xvalue == yvalue ? true_sux : false_sux;
case If::neq: return xvalue != yvalue ? true_sux : false_sux;
case If::eql: return xvalue == yvalue ? cond_true : cond_false;
case If::neq: return xvalue != yvalue ? cond_true : cond_false;
}
}
break;
}
}
return NULL;
return not_comparable;
}