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8052081: Optimize generated by C2 code for Intel's Atom processor

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Allow to execute vectorization and crc32 optimization on Atom. Enable UseFPUForSpilling by default on x86.

Reviewed-by: roland
This commit is contained in:
Vladimir Kozlov 2014-08-05 15:02:10 -07:00
parent 97512f58ec
commit 7764490363
7 changed files with 99 additions and 19 deletions
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14
hotspot/src/share/vm/opto/superword.cpp
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@ -1378,6 +1378,20 @@ void SuperWord::output() {
if (n->is_Load()) {
Node* ctl = n->in(MemNode::Control);
Node* mem = first->in(MemNode::Memory);
SWPointer p1(n->as_Mem(), this);
// Identify the memory dependency for the new loadVector node by
// walking up through memory chain.
// This is done to give flexibility to the new loadVector node so that
// it can move above independent storeVector nodes.
while (mem->is_StoreVector()) {
SWPointer p2(mem->as_Mem(), this);
int cmp = p1.cmp(p2);
if (SWPointer::not_equal(cmp) || !SWPointer::comparable(cmp)) {
mem = mem->in(MemNode::Memory);
} else {
break; // dependent memory
}
}
Node* adr = low_adr->in(MemNode::Address);
const TypePtr* atyp = n->adr_type();
vn = LoadVectorNode::make(opc, ctl, mem, adr, atyp, vlen, velt_basic_type(n));