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in releaseRegister, if the register is not the exclusive site of a value, steal it

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This commit is contained in:
Joel Dice 2008-11-10 21:25:36 -07:00
parent 54cda3ca61
commit 2304a656cf
1 changed files with 62 additions and 56 deletions
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118
src/compiler.cpp
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@ -1694,62 +1694,6 @@ toString(Context* c, Site* sites, char* buffer, unsigned size)
}
}
void
releaseRegister(Context* c, Value* v, unsigned frameIndex,
unsigned sizeInBytes, int r)
{
Site* source = 0;
for (SiteIterator it(v); it.hasMore();) {
Site* s = it.next();
if (s->usesRegister(c, r)) {
if (DebugRegisters) {
char buffer[256]; s->toString(c, buffer, 256);
fprintf(stderr, "%p (%s) in %p at %d uses %d\n",
s, buffer, v, frameIndex, r);
}
source = s;
it.remove(c);
} else {
if (DebugRegisters) {
char buffer[256]; s->toString(c, buffer, 256);
fprintf(stderr, "%p (%s) in %p at %d does not use %d\n",
s, buffer, v, frameIndex, r);
}
}
}
if (not hasSite(v)) {
move(c, c->stack, c->locals, sizeInBytes, v, source,
frameSite(c, frameIndex));
}
if (DebugRegisters) {
char buffer[256]; toString(c, v->sites, buffer, 256);
fprintf(stderr, "%p is left with %s\n", v, buffer);
}
}
unsigned
footprintSizeInBytes(unsigned footprint)
{
if (BytesPerWord == 8) {
return 8;
} else {
return footprint * 4;
}
}
void
releaseRegister(Context* c, int r)
{
for (FrameIterator it(c, c->stack, c->locals); it.hasMore();) {
FrameIterator::Element e = it.next(c);
releaseRegister(c, e.value, frameIndex(c, &e),
footprintSizeInBytes(e.footprint), r);
}
}
bool
find(Value* needle, Value* haystack)
{
@ -1852,6 +1796,68 @@ usedExclusively(Context* c, Register* r)
return used(c, r) and not hasMoreThanOneSite(r->value);
}
void
releaseRegister(Context* c, Value* v, unsigned frameIndex,
unsigned sizeInBytes, int r)
{
Site* source = 0;
for (SiteIterator it(v); it.hasMore();) {
Site* s = it.next();
if (s->usesRegister(c, r)) {
if (DebugRegisters) {
char buffer[256]; s->toString(c, buffer, 256);
fprintf(stderr, "%p (%s) in %p at %d uses %d\n",
s, buffer, v, frameIndex, r);
}
source = s;
it.remove(c);
} else {
if (DebugRegisters) {
char buffer[256]; s->toString(c, buffer, 256);
fprintf(stderr, "%p (%s) in %p at %d does not use %d\n",
s, buffer, v, frameIndex, r);
}
}
}
if (not hasSite(v)) {
move(c, c->stack, c->locals, sizeInBytes, v, source,
frameSite(c, frameIndex));
}
if (DebugRegisters) {
char buffer[256]; toString(c, v->sites, buffer, 256);
fprintf(stderr, "%p is left with %s\n", v, buffer);
}
}
unsigned
footprintSizeInBytes(unsigned footprint)
{
if (BytesPerWord == 8) {
return 8;
} else {
return footprint * 4;
}
}
void
releaseRegister(Context* c, int r)
{
Register* reg = c->registers[r];
if (used(c, reg) and not usedExclusively(c, reg)) {
removeSite(c, reg->value, reg->site);
if (reg->refCount == 0) return;
}
for (FrameIterator it(c, c->stack, c->locals); it.hasMore();) {
FrameIterator::Element e = it.next(c);
releaseRegister(c, e.value, frameIndex(c, &e),
footprintSizeInBytes(e.footprint), r);
}
}
unsigned
registerCost(Context* c, Register* r)
{