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Code Issues Projects Releases Wiki Activity

Allow disabling state tracking for faster startup.

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This commit is contained in:
losfair
2019-07-12 23:33:54 +08:00
parent f327feccef
commit 08cdc9a42f
4 changed files with 21 additions and 1 deletions
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8
lib/singlepass-backend/src/codegen_x64.rs
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@ -317,6 +317,7 @@ pub struct CodegenError {
struct CodegenConfig {
memory_bound_check_mode: MemoryBoundCheckMode,
enforce_stack_check: bool,
track_state: bool,
}
impl ModuleCodeGenerator<X64FunctionCode, X64ExecutionContext, CodegenError>
@ -366,7 +367,8 @@ impl ModuleCodeGenerator<X64FunctionCode, X64ExecutionContext, CodegenError>
begin_label_info.1 = Some(begin_offset);
let begin_label = begin_label_info.0;
let machine = Machine::new();
let mut machine = Machine::new();
machine.track_state = self.config.as_ref().unwrap().track_state;
dynasm!(
assembler
@ -532,6 +534,7 @@ impl ModuleCodeGenerator<X64FunctionCode, X64ExecutionContext, CodegenError>
self.config = Some(Arc::new(CodegenConfig {
memory_bound_check_mode: config.memory_bound_check_mode,
enforce_stack_check: config.enforce_stack_check,
track_state: config.track_state,
}));
Ok(())
}
@ -1594,6 +1597,9 @@ impl X64FunctionCode {
fsm: &mut FunctionStateMap,
control_stack: &mut [ControlFrame],
) -> usize {
if !m.track_state {
return ::std::usize::MAX;
}
let last_frame = control_stack.last_mut().unwrap();
let mut diff = m.state.diff(&last_frame.state);
diff.last = Some(last_frame.state_diff_id);