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don't skip move when MoveEvent is followed by a PushEvent which is not active; use existing register site in ValueSite when possible

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This commit is contained in:
Joel Dice 2008-04-29 08:59:12 -06:00
parent 7791b1df80
commit c96f44d77d
2 changed files with 14 additions and 7 deletions
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4
src/compile.cpp
View File

@ -3875,11 +3875,11 @@ finish(MyThread* t, Context* context)
strcmp
(reinterpret_cast<const char*>
(&byteArrayBody(t, className(t, methodClass(t, context->method)), 0)),
"java/lang/Class") == 0 and
"java/lang/Number") == 0 and
strcmp
(reinterpret_cast<const char*>
(&byteArrayBody(t, methodName(t, context->method), 0)),
"replace") == 0)
"<init>") == 0)
{
asm("int3");
}

17
src/compiler.cpp
View File

@ -332,7 +332,7 @@ class Event {
virtual void compile(Context* c) = 0;
virtual bool isBranch() { return false; };
virtual bool skipMove(unsigned) { return false; }
Event* next;
Stack* stack;
@ -682,6 +682,11 @@ class ValueSite: public AbstractSite {
if (s and s->type(c) == RegisterOperand) {
return s;
} else {
for (Site* s = r->value->sites; s; s = s->next) {
if (s->type(c) == RegisterOperand) {
return s;
}
}
return freeRegister(c, r->size, true);
}
}
@ -988,6 +993,10 @@ class PushEvent: public Event {
nextRead(c, s->value);
}
virtual bool skipMove(unsigned size) {
return active and size >= 4;
}
Stack* s;
bool active;
};
@ -1182,9 +1191,9 @@ class MoveEvent: public Event {
Site* target;
unsigned cost;
if (type == Move
and size >= BytesPerWord
and dst->reads
and next == dst->reads->event)
and next == dst->reads->event
and dst->reads->event->skipMove(size))
{
target = src->source;
cost = 0;
@ -1575,8 +1584,6 @@ class BranchEvent: public Event {
nextRead(c, address);
}
virtual bool isBranch() { return true; };
UnaryOperation type;
Value* address;
};