bool IRInstruction::cseEquals(IRInstruction* inst) const {
assert(canCSE());
if (m_op != inst->m_op ||
m_typeParam != inst->m_typeParam ||
m_numSrcs != inst->m_numSrcs) {
return false;
}
for (uint32_t i = 0; i < numSrcs(); i++) {
if (src(i) != inst->src(i)) {
return false;
}
}
if (hasExtra() && !cseEqualsExtra(op(), m_extra, inst->m_extra)) {
return false;
}
/*
* Don't CSE on the edges--it's ok to use the destination of some
* earlier guarded load even though the instruction we may have
* generated here would've exited to a different trace.
*
* For example, we use this to cse LdThis regardless of its label.
*/
return true;
}
size_t IRInstruction::cseHash() const {
assert(canCSE());
size_t srcHash = 0;
for (unsigned i = 0; i < numSrcs(); ++i) {
srcHash = CSEHash::hashCombine(srcHash, src(i));
}
if (hasExtra()) {
srcHash = CSEHash::hashCombine(srcHash,
cseHashExtra(op(), m_extra));
}
return CSEHash::hashCombine(srcHash, m_op, m_typeParam);
}