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VM: Refactor quotations.cpp/hpp to Factor style

db4
Erik Charlebois 2013-05-11 22:27:06 -04:00
parent 4dffb25fe6
commit 435ac636c6
2 changed files with 297 additions and 338 deletions
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574
vm/quotations.cpp
View File

@ -1,12 +1,12 @@
#include "master.hpp"
namespace factor
{
namespace factor {
/* Simple non-optimizing compiler.
This is one of the two compilers implementing Factor; the second one is written
in Factor and performs advanced optimizations. See basis/compiler/compiler.factor.
in Factor and performs advanced optimizations. See
basis/compiler/compiler.factor.
The non-optimizing compiler compiles a quotation at a time by concatenating
machine code chunks; prolog, epilog, call word, jump to word, etc. These machine
@ -36,420 +36,378 @@ includes stack shufflers, some fixnum arithmetic words, and words such as tag,
slot and eq?. A primitive call is relatively expensive (two subroutine calls)
so this results in a big speedup for relatively little effort. */
void quotation_jit::init_quotation(cell quot)
{
elements = untag<quotation>(quot)->array;
void quotation_jit::init_quotation(cell quot) {
elements = untag<quotation>(quot)->array;
}
bool quotation_jit::primitive_call_p(cell i, cell length)
{
return (i + 2) <= length && array_nth(elements.untagged(),i + 1) == parent->special_objects[JIT_PRIMITIVE_WORD];
bool quotation_jit::primitive_call_p(cell i, cell length) {
return (i + 2) <= length && array_nth(elements.untagged(), i + 1) ==
parent->special_objects[JIT_PRIMITIVE_WORD];
}
bool quotation_jit::fast_if_p(cell i, cell length)
{
return (i + 3) == length
&& tagged<object>(array_nth(elements.untagged(),i + 1)).type_p(QUOTATION_TYPE)
&& array_nth(elements.untagged(),i + 2) == parent->special_objects[JIT_IF_WORD];
bool quotation_jit::fast_if_p(cell i, cell length) {
return (i + 3) == length &&
tagged<object>(array_nth(elements.untagged(), i + 1))
.type_p(QUOTATION_TYPE) &&
array_nth(elements.untagged(), i + 2) ==
parent->special_objects[JIT_IF_WORD];
}
bool quotation_jit::fast_dip_p(cell i, cell length)
{
return (i + 2) <= length && array_nth(elements.untagged(),i + 1) == parent->special_objects[JIT_DIP_WORD];
bool quotation_jit::fast_dip_p(cell i, cell length) {
return (i + 2) <= length && array_nth(elements.untagged(), i + 1) ==
parent->special_objects[JIT_DIP_WORD];
}
bool quotation_jit::fast_2dip_p(cell i, cell length)
{
return (i + 2) <= length && array_nth(elements.untagged(),i + 1) == parent->special_objects[JIT_2DIP_WORD];
bool quotation_jit::fast_2dip_p(cell i, cell length) {
return (i + 2) <= length && array_nth(elements.untagged(), i + 1) ==
parent->special_objects[JIT_2DIP_WORD];
}
bool quotation_jit::fast_3dip_p(cell i, cell length)
{
return (i + 2) <= length && array_nth(elements.untagged(),i + 1) == parent->special_objects[JIT_3DIP_WORD];
bool quotation_jit::fast_3dip_p(cell i, cell length) {
return (i + 2) <= length && array_nth(elements.untagged(), i + 1) ==
parent->special_objects[JIT_3DIP_WORD];
}
bool quotation_jit::mega_lookup_p(cell i, cell length)
{
return (i + 4) <= length
&& tagged<object>(array_nth(elements.untagged(),i + 1)).type_p(FIXNUM_TYPE)
&& tagged<object>(array_nth(elements.untagged(),i + 2)).type_p(ARRAY_TYPE)
&& array_nth(elements.untagged(),i + 3) == parent->special_objects[MEGA_LOOKUP_WORD];
bool quotation_jit::mega_lookup_p(cell i, cell length) {
return (i + 4) <= length &&
tagged<object>(array_nth(elements.untagged(), i + 1))
.type_p(FIXNUM_TYPE) &&
tagged<object>(array_nth(elements.untagged(), i + 2))
.type_p(ARRAY_TYPE) &&
array_nth(elements.untagged(), i + 3) ==
parent->special_objects[MEGA_LOOKUP_WORD];
}
bool quotation_jit::declare_p(cell i, cell length)
{
return (i + 2) <= length
&& array_nth(elements.untagged(),i + 1) == parent->special_objects[JIT_DECLARE_WORD];
bool quotation_jit::declare_p(cell i, cell length) {
return (i + 2) <= length && array_nth(elements.untagged(), i + 1) ==
parent->special_objects[JIT_DECLARE_WORD];
}
bool quotation_jit::special_subprimitive_p(cell obj)
{
// Subprimitives should be flagged with whether they require a stack frame.
// See #295.
return obj == parent->special_objects[SIGNAL_HANDLER_WORD]
|| obj == parent->special_objects[LEAF_SIGNAL_HANDLER_WORD]
|| obj == parent->special_objects[FFI_SIGNAL_HANDLER_WORD]
|| obj == parent->special_objects[FFI_LEAF_SIGNAL_HANDLER_WORD]
|| obj == parent->special_objects[UNWIND_NATIVE_FRAMES_WORD];
bool quotation_jit::special_subprimitive_p(cell obj) {
// Subprimitives should be flagged with whether they require a stack frame.
// See #295.
return obj == parent->special_objects[SIGNAL_HANDLER_WORD] ||
obj == parent->special_objects[LEAF_SIGNAL_HANDLER_WORD] ||
obj == parent->special_objects[FFI_SIGNAL_HANDLER_WORD] ||
obj == parent->special_objects[FFI_LEAF_SIGNAL_HANDLER_WORD] ||
obj == parent->special_objects[UNWIND_NATIVE_FRAMES_WORD];
}
bool quotation_jit::word_stack_frame_p(cell obj)
{
return (to_boolean(untag<word>(obj)->subprimitive) && !special_subprimitive_p(obj))
|| obj == parent->special_objects[JIT_PRIMITIVE_WORD];
bool quotation_jit::word_stack_frame_p(cell obj) {
return (to_boolean(untag<word>(obj)->subprimitive) &&
!special_subprimitive_p(obj)) ||
obj == parent->special_objects[JIT_PRIMITIVE_WORD];
}
bool quotation_jit::word_safepoint_p(cell obj)
{
return !special_subprimitive_p(obj);
bool quotation_jit::word_safepoint_p(cell obj) {
return !special_subprimitive_p(obj);
}
bool quotation_jit::safepoint_p()
{
fixnum length = array_capacity(elements.untagged());
bool quotation_jit::safepoint_p() {
fixnum length = array_capacity(elements.untagged());
for(fixnum i = 0; i < length; i++)
{
cell obj = array_nth(elements.untagged(),i);
switch(tagged<object>(obj).type())
{
case WORD_TYPE:
if(!word_safepoint_p(obj))
return false;
break;
default:
break;
}
}
for (fixnum i = 0; i < length; i++) {
cell obj = array_nth(elements.untagged(), i);
switch (tagged<object>(obj).type()) {
case WORD_TYPE:
if (!word_safepoint_p(obj))
return false;
break;
default:
break;
}
}
return true;
return true;
}
bool quotation_jit::stack_frame_p()
{
fixnum length = array_capacity(elements.untagged());
bool quotation_jit::stack_frame_p() {
fixnum length = array_capacity(elements.untagged());
for(fixnum i = 0; i < length; i++)
{
cell obj = array_nth(elements.untagged(),i);
if (tagged<object>(obj).type() == WORD_TYPE && !word_safepoint_p(obj))
return false;
}
for (fixnum i = 0; i < length; i++) {
cell obj = array_nth(elements.untagged(), i);
if (tagged<object>(obj).type() == WORD_TYPE && !word_safepoint_p(obj))
return false;
}
return true;
return true;
}
bool quotation_jit::trivial_quotation_p(array *elements)
{
return array_capacity(elements) == 1 && tagged<object>(array_nth(elements,0)).type_p(WORD_TYPE);
bool quotation_jit::trivial_quotation_p(array* elements) {
return array_capacity(elements) == 1 &&
tagged<object>(array_nth(elements, 0)).type_p(WORD_TYPE);
}
void quotation_jit::emit_prolog(bool safepoint, bool stack_frame)
{
if(safepoint) emit(parent->special_objects[JIT_SAFEPOINT]);
if(stack_frame) emit(parent->special_objects[JIT_PROLOG]);
void quotation_jit::emit_prolog(bool safepoint, bool stack_frame) {
if (safepoint)
emit(parent->special_objects[JIT_SAFEPOINT]);
if (stack_frame)
emit(parent->special_objects[JIT_PROLOG]);
}
void quotation_jit::emit_epilog(bool safepoint, bool stack_frame)
{
if(safepoint) emit(parent->special_objects[JIT_SAFEPOINT]);
if(stack_frame) emit(parent->special_objects[JIT_EPILOG]);
void quotation_jit::emit_epilog(bool safepoint, bool stack_frame) {
if (safepoint)
emit(parent->special_objects[JIT_SAFEPOINT]);
if (stack_frame)
emit(parent->special_objects[JIT_EPILOG]);
}
/* Allocates memory conditionally */
void quotation_jit::emit_quot(cell quot_)
{
data_root<quotation> quot(quot_,parent);
void quotation_jit::emit_quot(cell quot_) {
data_root<quotation> quot(quot_, parent);
array *elements = untag<array>(quot->array);
array* elements = untag<array>(quot->array);
/* If the quotation consists of a single word, compile a direct call
to the word. */
if(trivial_quotation_p(elements))
literal(array_nth(elements,0));
else
{
if(compiling) parent->jit_compile_quot(quot.value(),relocate);
literal(quot.value());
}
/* If the quotation consists of a single word, compile a direct call
to the word. */
if (trivial_quotation_p(elements))
literal(array_nth(elements, 0));
else {
if (compiling)
parent->jit_compile_quot(quot.value(), relocate);
literal(quot.value());
}
}
/* Allocates memory */
void quotation_jit::iterate_quotation()
{
bool safepoint = safepoint_p();
bool stack_frame = stack_frame_p();
void quotation_jit::iterate_quotation() {
bool safepoint = safepoint_p();
bool stack_frame = stack_frame_p();
set_position(0);
set_position(0);
emit_prolog(safepoint, stack_frame);
emit_prolog(safepoint, stack_frame);
cell i;
cell length = array_capacity(elements.untagged());
bool tail_call = false;
cell i;
cell length = array_capacity(elements.untagged());
bool tail_call = false;
for(i = 0; i < length; i++)
{
set_position(i);
for (i = 0; i < length; i++) {
set_position(i);
data_root<object> obj(array_nth(elements.untagged(),i),parent);
data_root<object> obj(array_nth(elements.untagged(), i), parent);
switch(obj.type())
{
case WORD_TYPE:
/* Sub-primitives */
if(to_boolean(obj.as<word>()->subprimitive))
{
tail_call = emit_subprimitive(obj.value(), /* word */
i == length - 1, /* tail_call_p */
stack_frame); /* stack_frame_p */
}
/* Everything else */
else if(i == length - 1)
{
emit_epilog(safepoint, stack_frame);
tail_call = true;
word_jump(obj.value());
}
else
word_call(obj.value());
break;
case WRAPPER_TYPE:
push(obj.as<wrapper>()->object);
break;
case BYTE_ARRAY_TYPE:
/* Primitive calls */
if(primitive_call_p(i,length))
{
/* On x86-64 and PowerPC, the VM pointer is stored in
a register; on other platforms, the RT_VM relocation
is used and it needs an offset parameter */
switch (obj.type()) {
case WORD_TYPE:
/* Sub-primitives */
if (to_boolean(obj.as<word>()->subprimitive)) {
tail_call = emit_subprimitive(obj.value(), /* word */
i == length - 1, /* tail_call_p */
stack_frame); /* stack_frame_p */
} /* Everything else */
else if (i == length - 1) {
emit_epilog(safepoint, stack_frame);
tail_call = true;
word_jump(obj.value());
} else
word_call(obj.value());
break;
case WRAPPER_TYPE:
push(obj.as<wrapper>()->object);
break;
case BYTE_ARRAY_TYPE:
/* Primitive calls */
if (primitive_call_p(i, length)) {
/* On x86-64 and PowerPC, the VM pointer is stored in
a register; on other platforms, the RT_VM relocation
is used and it needs an offset parameter */
#ifdef FACTOR_X86
parameter(tag_fixnum(0));
parameter(tag_fixnum(0));
#endif
parameter(obj.value());
parameter(false_object);
parameter(obj.value());
parameter(false_object);
#ifdef FACTOR_PPC_TOC
parameter(obj.value());
parameter(false_object);
parameter(obj.value());
parameter(false_object);
#endif
emit(parent->special_objects[JIT_PRIMITIVE]);
emit(parent->special_objects[JIT_PRIMITIVE]);
i++;
}
else
push(obj.value());
break;
case QUOTATION_TYPE:
/* 'if' preceded by two literal quotations (this is why if and ? are
mutually recursive in the library, but both still work) */
if(fast_if_p(i,length))
{
emit_epilog(safepoint, stack_frame);
tail_call = true;
i++;
} else
push(obj.value());
break;
case QUOTATION_TYPE:
/* 'if' preceded by two literal quotations (this is why if and ? are
mutually recursive in the library, but both still work) */
if (fast_if_p(i, length)) {
emit_epilog(safepoint, stack_frame);
tail_call = true;
emit_quot(array_nth(elements.untagged(),i));
emit_quot(array_nth(elements.untagged(),i + 1));
emit(parent->special_objects[JIT_IF]);
emit_quot(array_nth(elements.untagged(), i));
emit_quot(array_nth(elements.untagged(), i + 1));
emit(parent->special_objects[JIT_IF]);
i += 2;
}
/* dip */
else if(fast_dip_p(i,length))
{
emit_quot(obj.value());
emit(parent->special_objects[JIT_DIP]);
i++;
}
/* 2dip */
else if(fast_2dip_p(i,length))
{
emit_quot(obj.value());
emit(parent->special_objects[JIT_2DIP]);
i++;
}
/* 3dip */
else if(fast_3dip_p(i,length))
{
emit_quot(obj.value());
emit(parent->special_objects[JIT_3DIP]);
i++;
}
else
push(obj.value());
break;
case ARRAY_TYPE:
/* Method dispatch */
if(mega_lookup_p(i,length))
{
fixnum index = untag_fixnum(array_nth(elements.untagged(),i + 1));
/* Load the object from the datastack, then remove our stack frame. */
emit_with_literal(parent->special_objects[PIC_LOAD],tag_fixnum(-index * sizeof(cell)));
emit_epilog(safepoint, stack_frame);
tail_call = true;
i += 2;
} /* dip */
else if (fast_dip_p(i, length)) {
emit_quot(obj.value());
emit(parent->special_objects[JIT_DIP]);
i++;
} /* 2dip */
else if (fast_2dip_p(i, length)) {
emit_quot(obj.value());
emit(parent->special_objects[JIT_2DIP]);
i++;
} /* 3dip */
else if (fast_3dip_p(i, length)) {
emit_quot(obj.value());
emit(parent->special_objects[JIT_3DIP]);
i++;
} else
push(obj.value());
break;
case ARRAY_TYPE:
/* Method dispatch */
if (mega_lookup_p(i, length)) {
fixnum index = untag_fixnum(array_nth(elements.untagged(), i + 1));
/* Load the object from the datastack, then remove our stack frame. */
emit_with_literal(parent->special_objects[PIC_LOAD],
tag_fixnum(-index * sizeof(cell)));
emit_epilog(safepoint, stack_frame);
tail_call = true;
emit_mega_cache_lookup(
array_nth(elements.untagged(),i),
index,
array_nth(elements.untagged(),i + 2));
i += 3;
}
/* Non-optimizing compiler ignores declarations */
else if(declare_p(i,length))
i++;
else
push(obj.value());
break;
default:
push(obj.value());
break;
}
}
emit_mega_cache_lookup(array_nth(elements.untagged(), i), index,
array_nth(elements.untagged(), i + 2));
i += 3;
} /* Non-optimizing compiler ignores declarations */
else if (declare_p(i, length))
i++;
else
push(obj.value());
break;
default:
push(obj.value());
break;
}
}
if(!tail_call)
{
set_position(length);
if (!tail_call) {
set_position(length);
emit_epilog(safepoint, stack_frame);
emit(parent->special_objects[JIT_RETURN]);
}
emit_epilog(safepoint, stack_frame);
emit(parent->special_objects[JIT_RETURN]);
}
}
cell quotation_jit::word_stack_frame_size(cell obj)
{
if (special_subprimitive_p(obj))
return SIGNAL_HANDLER_STACK_FRAME_SIZE;
else
return JIT_FRAME_SIZE;
cell quotation_jit::word_stack_frame_size(cell obj) {
if (special_subprimitive_p(obj))
return SIGNAL_HANDLER_STACK_FRAME_SIZE;
else
return JIT_FRAME_SIZE;
}
/* Allocates memory */
code_block *factor_vm::jit_compile_quot(cell owner_, cell quot_, bool relocating)
{
data_root<object> owner(owner_,this);
data_root<quotation> quot(quot_,this);
code_block* factor_vm::jit_compile_quot(cell owner_, cell quot_,
bool relocating) {
data_root<object> owner(owner_, this);
data_root<quotation> quot(quot_, this);
quotation_jit compiler(owner.value(),true,relocating,this);
compiler.init_quotation(quot.value());
compiler.iterate_quotation();
quotation_jit compiler(owner.value(), true, relocating, this);
compiler.init_quotation(quot.value());
compiler.iterate_quotation();
cell frame_size = compiler.word_stack_frame_size(owner_);
cell frame_size = compiler.word_stack_frame_size(owner_);
code_block *compiled = compiler.to_code_block(frame_size);
code_block* compiled = compiler.to_code_block(frame_size);
if(relocating) initialize_code_block(compiled);
if (relocating)
initialize_code_block(compiled);
return compiled;
return compiled;
}
/* Allocates memory */
void factor_vm::jit_compile_quot(cell quot_, bool relocating)
{
data_root<quotation> quot(quot_,this);
if(!quot_compiled_p(quot.untagged()))
{
code_block *compiled = jit_compile_quot(quot.value(),quot.value(),relocating);
quot.untagged()->entry_point = compiled->entry_point();
}
void factor_vm::jit_compile_quot(cell quot_, bool relocating) {
data_root<quotation> quot(quot_, this);
if (!quot_compiled_p(quot.untagged())) {
code_block* compiled =
jit_compile_quot(quot.value(), quot.value(), relocating);
quot.untagged()->entry_point = compiled->entry_point();
}
}
/* Allocates memory */
void factor_vm::primitive_jit_compile()
{
jit_compile_quot(ctx->pop(),true);
}
void factor_vm::primitive_jit_compile() { jit_compile_quot(ctx->pop(), true); }
void *factor_vm::lazy_jit_compile_entry_point()
{
return untag<word>(special_objects[LAZY_JIT_COMPILE_WORD])->entry_point;
void* factor_vm::lazy_jit_compile_entry_point() {
return untag<word>(special_objects[LAZY_JIT_COMPILE_WORD])->entry_point;
}
/* push a new quotation on the stack */
/* Allocates memory */
void factor_vm::primitive_array_to_quotation()
{
quotation *quot = allot<quotation>(sizeof(quotation));
void factor_vm::primitive_array_to_quotation() {
quotation* quot = allot<quotation>(sizeof(quotation));
quot->array = ctx->peek();
quot->cached_effect = false_object;
quot->cache_counter = false_object;
quot->entry_point = lazy_jit_compile_entry_point();
quot->array = ctx->peek();
quot->cached_effect = false_object;
quot->cache_counter = false_object;
quot->entry_point = lazy_jit_compile_entry_point();
ctx->replace(tag<quotation>(quot));
ctx->replace(tag<quotation>(quot));
}
/* Allocates memory (from_unsigned_cell) */
void factor_vm::primitive_quotation_code()
{
data_root<quotation> quot(ctx->pop(),this);
void factor_vm::primitive_quotation_code() {
data_root<quotation> quot(ctx->pop(), this);
ctx->push(from_unsigned_cell((cell)quot->entry_point));
ctx->push(from_unsigned_cell((cell)quot->code() + quot->code()->size()));
ctx->push(from_unsigned_cell((cell) quot->entry_point));
ctx->push(from_unsigned_cell((cell) quot->code() + quot->code()->size()));
}
/* Allocates memory */
fixnum factor_vm::quot_code_offset_to_scan(cell quot_, cell offset)
{
data_root<quotation> quot(quot_,this);
data_root<array> array(quot->array,this);
fixnum factor_vm::quot_code_offset_to_scan(cell quot_, cell offset) {
data_root<quotation> quot(quot_, this);
data_root<array> array(quot->array, this);
quotation_jit compiler(quot.value(),false,false,this);
compiler.init_quotation(quot.value());
compiler.compute_position(offset);
compiler.iterate_quotation();
quotation_jit compiler(quot.value(), false, false, this);
compiler.init_quotation(quot.value());
compiler.compute_position(offset);
compiler.iterate_quotation();
return compiler.get_position();
return compiler.get_position();
}
/* Allocates memory */
cell factor_vm::lazy_jit_compile(cell quot_)
{
data_root<quotation> quot(quot_,this);
cell factor_vm::lazy_jit_compile(cell quot_) {
data_root<quotation> quot(quot_, this);
FACTOR_ASSERT(!quot_compiled_p(quot.untagged()));
FACTOR_ASSERT(!quot_compiled_p(quot.untagged()));
code_block *compiled = jit_compile_quot(quot.value(),quot.value(),true);
quot.untagged()->entry_point = compiled->entry_point();
code_block* compiled = jit_compile_quot(quot.value(), quot.value(), true);
quot.untagged()->entry_point = compiled->entry_point();
return quot.value();
return quot.value();
}
/* Allocates memory */
VM_C_API cell lazy_jit_compile(cell quot, factor_vm *parent)
{
return parent->lazy_jit_compile(quot);
VM_C_API cell lazy_jit_compile(cell quot, factor_vm* parent) {
return parent->lazy_jit_compile(quot);
}
bool factor_vm::quot_compiled_p(quotation *quot)
{
return quot->entry_point != NULL && quot->entry_point != lazy_jit_compile_entry_point();
bool factor_vm::quot_compiled_p(quotation* quot) {
return quot->entry_point != NULL &&
quot->entry_point != lazy_jit_compile_entry_point();
}
void factor_vm::primitive_quot_compiled_p()
{
tagged<quotation> quot(ctx->pop());
quot.untag_check(this);
ctx->push(tag_boolean(quot_compiled_p(quot.untagged())));
void factor_vm::primitive_quot_compiled_p() {
tagged<quotation> quot(ctx->pop());
quot.untag_check(this);
ctx->push(tag_boolean(quot_compiled_p(quot.untagged())));
}
/* Allocates memory */
cell factor_vm::find_all_quotations()
{
return instances(QUOTATION_TYPE);
}
cell factor_vm::find_all_quotations() { return instances(QUOTATION_TYPE); }
/* Allocates memory */
void factor_vm::initialize_all_quotations()
{
data_root<array> quotations(find_all_quotations(),this);
void factor_vm::initialize_all_quotations() {
data_root<array> quotations(find_all_quotations(), this);
cell length = array_capacity(quotations.untagged());
for(cell i = 0; i < length; i++)
{
data_root<quotation> quot(array_nth(quotations.untagged(),i),this);
if(!quot->entry_point)
quot.untagged()->entry_point = lazy_jit_compile_entry_point();
}
cell length = array_capacity(quotations.untagged());
for (cell i = 0; i < length; i++) {
data_root<quotation> quot(array_nth(quotations.untagged(), i), this);
if (!quot->entry_point)
quot.untagged()->entry_point = lazy_jit_compile_entry_point();
}
}
}

61
vm/quotations.hpp
View File

@ -1,38 +1,39 @@
namespace factor
{
namespace factor {
struct quotation_jit : public jit {
data_root<array> elements;
bool compiling, relocate;
data_root<array> elements;
bool compiling, relocate;
explicit quotation_jit(cell owner, bool compiling_, bool relocate_, factor_vm *vm)
: jit(code_block_unoptimized,owner,vm),
elements(false_object,vm),
compiling(compiling_),
relocate(relocate_){};
explicit quotation_jit(cell owner, bool compiling_, bool relocate_,
factor_vm* vm)
: jit(code_block_unoptimized, owner, vm),
elements(false_object, vm),
compiling(compiling_),
relocate(relocate_) {}
;
void init_quotation(cell quot);
void emit_mega_cache_lookup(cell methods, fixnum index, cell cache);
bool primitive_call_p(cell i, cell length);
bool trivial_quotation_p(array *elements);
void emit_quot(cell quot);
void emit_prolog(bool safepoint, bool stack_frame);
void emit_epilog(bool safepoint, bool stack_frame);
bool fast_if_p(cell i, cell length);
bool fast_dip_p(cell i, cell length);
bool fast_2dip_p(cell i, cell length);
bool fast_3dip_p(cell i, cell length);
bool mega_lookup_p(cell i, cell length);
bool declare_p(cell i, cell length);
bool special_subprimitive_p(cell obj);
bool word_stack_frame_p(cell obj);
cell word_stack_frame_size(cell obj);
bool word_safepoint_p(cell obj);
bool stack_frame_p();
bool safepoint_p();
void iterate_quotation();
void init_quotation(cell quot);
void emit_mega_cache_lookup(cell methods, fixnum index, cell cache);
bool primitive_call_p(cell i, cell length);
bool trivial_quotation_p(array* elements);
void emit_quot(cell quot);
void emit_prolog(bool safepoint, bool stack_frame);
void emit_epilog(bool safepoint, bool stack_frame);
bool fast_if_p(cell i, cell length);
bool fast_dip_p(cell i, cell length);
bool fast_2dip_p(cell i, cell length);
bool fast_3dip_p(cell i, cell length);
bool mega_lookup_p(cell i, cell length);
bool declare_p(cell i, cell length);
bool special_subprimitive_p(cell obj);
bool word_stack_frame_p(cell obj);
cell word_stack_frame_size(cell obj);
bool word_safepoint_p(cell obj);
bool stack_frame_p();
bool safepoint_p();
void iterate_quotation();
};
VM_C_API cell lazy_jit_compile(cell quot, factor_vm *parent);
VM_C_API cell lazy_jit_compile(cell quot, factor_vm* parent);
}