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Removing SET_RETURN_ADDRESS - hopefully it'll never be needed again.

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This commit is contained in:
Ben Vanik
2014-01-26 01:18:59 -08:00
parent 8789fd4134
commit ecf0988ddb
20 changed files with 81 additions and 83 deletions
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4
src/alloy/backend/ivm/ivm_function.cc
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@@ -104,7 +104,7 @@ void IVMFunction::OnBreakpointHit(ThreadState* thread_state, IntCode* i) {
#undef TRACE_SOURCE_OFFSET
int IVMFunction::CallImpl(ThreadState* thread_state, uint64_t return_address) {
int IVMFunction::CallImpl(ThreadState* thread_state) {
// Setup register file on stack.
auto stack = (IVMStack*)thread_state->backend_data();
auto register_file = (Register*)stack->Alloc(register_count_);
@@ -120,8 +120,6 @@ int IVMFunction::CallImpl(ThreadState* thread_state, uint64_t return_address) {
ics.did_saturate = 0;
ics.access_callbacks = thread_state->runtime()->access_callbacks();
ics.thread_state = thread_state;
ics.return_address = return_address;
ics.call_return_address = 0;
volatile int* suspend_flag_address = thread_state->suspend_flag_address();

3
src/alloy/backend/ivm/ivm_function.h
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@@ -31,8 +31,7 @@ public:
protected:
virtual int AddBreakpointImpl(runtime::Breakpoint* breakpoint);
virtual int RemoveBreakpointImpl(runtime::Breakpoint* breakpoint);
virtual int CallImpl(runtime::ThreadState* thread_state,
uint64_t return_address);
virtual int CallImpl(runtime::ThreadState* thread_state);
private:
IntCode* GetIntCodeAtSourceOffset(uint64_t offset);

22
src/alloy/backend/ivm/ivm_intcode.cc
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@@ -580,9 +580,7 @@ uint32_t IntCode_CALL_XX(IntCodeState& ics, const IntCode* i, uint32_t reg) {
ics.thread_state->runtime()->ResolveFunction(symbol_info->address(), &fn);
XEASSERTNOTNULL(fn);
// TODO(benvanik): proper tail call support, somehow.
uint64_t return_address =
(i->flags & CALL_TAIL) ? ics.return_address : ics.call_return_address;
fn->Call(ics.thread_state, return_address);
fn->Call(ics.thread_state);
if (i->flags & CALL_TAIL) {
return IA_RETURN;
}
@@ -647,19 +645,12 @@ int Translate_CALL_TRUE(TranslationContext& ctx, Instr* i) {
uint32_t IntCode_CALL_INDIRECT_XX(IntCodeState& ics, const IntCode* i, uint32_t reg) {
uint64_t target = ics.rf[reg].u32;
// Check if return address - if so, return.
if (target == ics.return_address) {
return IA_RETURN;
}
// Real call.
Function* fn = NULL;
ics.thread_state->runtime()->ResolveFunction(target, &fn);
XEASSERTNOTNULL(fn);
// TODO(benvanik): proper tail call support, somehow.
uint64_t return_address =
(i->flags & CALL_TAIL) ? ics.return_address : ics.call_return_address;
fn->Call(ics.thread_state, return_address);
fn->Call(ics.thread_state);
if (i->flags & CALL_TAIL) {
return IA_RETURN;
}
@@ -777,14 +768,6 @@ int Translate_RETURN_TRUE(TranslationContext& ctx, Instr* i) {
return DispatchToC(ctx, i, fns[i->src1.value->type]);
}
uint32_t IntCode_SET_RETURN_ADDRESS(IntCodeState& ics, const IntCode* i) {
ics.call_return_address = ics.rf[i->src1_reg].u32;
return IA_NEXT;
}
int Translate_SET_RETURN_ADDRESS(TranslationContext& ctx, Instr* i) {
return DispatchToC(ctx, i, IntCode_SET_RETURN_ADDRESS);
}
uint32_t IntCode_BRANCH_XX(IntCodeState& ics, const IntCode* i, uint32_t reg) {
return ics.rf[reg].u32;
}
@@ -4028,7 +4011,6 @@ static const TranslateFn dispatch_table[] = {
Translate_CALL_INDIRECT_TRUE,
Translate_RETURN,
Translate_RETURN_TRUE,
Translate_SET_RETURN_ADDRESS,
Translate_BRANCH,
Translate_BRANCH_TRUE,

2
src/alloy/backend/ivm/ivm_intcode.h
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@@ -48,8 +48,6 @@ typedef struct {
int8_t did_saturate;
runtime::RegisterAccessCallbacks* access_callbacks;
runtime::ThreadState* thread_state;
uint64_t return_address;
uint64_t call_return_address;
} IntCodeState;