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avoid unnecessary moves in resolveJunctionSite; distinguish between branches and other events when deciding when to marshal values at junctions

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This commit is contained in:
Joel Dice 2008-10-07 18:08:13 -06:00
parent f6c4496166
commit 83d5d6fde4
2 changed files with 17 additions and 8 deletions
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2
src/compile.cpp
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@ -3881,7 +3881,7 @@ finish(MyThread* t, Context* context)
strcmp
(reinterpret_cast<const char*>
(&byteArrayBody(t, methodName(t, context->method), 0)),
"getName") == 0)
"replace") == 0)
{
asm("int3");
}

23
src/compiler.cpp
View File

@ -19,7 +19,7 @@ const bool DebugAppend = true;
const bool DebugCompile = true;
const bool DebugStack = false;
const bool DebugRegisters = true;
const bool DebugFrameIndexes = false;
const bool DebugFrameIndexes = true;
const int AnyFrameIndex = -2;
const int NoFrameIndex = -1;
@ -506,6 +506,8 @@ class Event {
virtual void compilePostsync(Context*) { }
virtual bool isBranch() { return false; }
Event* next;
Stack* stackBefore;
Local* localsBefore;
@ -1635,8 +1637,6 @@ validate(Context* c, uint32_t mask, Stack* stack, Local* locals,
current->value = value;
current->site = site;
return current;
} else {
removeSite(c, current->value, current->site);
}
}
@ -2565,6 +2565,8 @@ class BranchEvent: public Event {
nextRead(c, this, address);
}
virtual bool isBranch() { return true; }
UnaryOperation type;
Value* address;
};
@ -2775,7 +2777,7 @@ resolveJunctionSite(Context* c, Event* e, Value* v, unsigned index,
Site* target = e->junctionSites[index];
unsigned copyCost;
Site* site = pick(c, v->sites, target, &copyCost);
if (v->visited or copyCost) {
if ((v->visited and target->type(c) == RegisterOperand) or copyCost) {
move(c, e->stackAfter, e->localsAfter, r->size, v, site, target);
} else {
target = site;
@ -2931,7 +2933,8 @@ setSites(Context* c, Event* e, Site** sites)
if (live(v)) {
// fprintf(stderr, "set sites %p for %p at %d\n", sites[i], v, i);
addSite(c, 0, 0, v->reads->size, v, sites[i]);
addSite(c, e->stackBefore, e->localsBefore, v->reads->size, v,
sites[i]);
}
}
}
@ -2944,7 +2947,8 @@ setSites(Context* c, Event* e, Site** sites)
if (live(v)) {
// fprintf(stderr, "set sites %p for %p at %d\n", sites[i], v, i);
addSite(c, 0, 0, v->reads->size, v, sites[i]);
addSite(c, e->stackBefore, e->localsBefore, v->reads->size, v,
sites[i]);
}
i -= stack->size;
}
@ -3120,9 +3124,14 @@ compile(Context* c)
populateSources(c, e);
bool branch = e->isBranch();
if (branch and e->successors) {
populateSiteTables(c, e);
}
e->compile(c);
if (e->successors) {
if ((not branch) and e->successors) {
populateSiteTables(c, e);
}