Update LLVM FCG begin_body

lib/llvm-backend/src/code.rs

@@ -2520,6 +2520,7 @@ pub struct LLVMFunctionCodeGenerator {
     // returns: SmallVec<[WpType; 1]>,
     locals: Vec<PointerValue>, // Contains params and locals
     num_params: usize,
+    ctx: Option<CtxType<'static>>,
     // num_locals: usize,
     // value_stack: Vec<(Location, LocalOrTemp)>,
     // control_stack: Vec<ControlFrame>,
@@ -2565,7 +2566,27 @@ impl FunctionCodeGenerator<CodegenError> for LLVMFunctionCodeGenerator {
         Ok(())
     }
 
-    fn begin_body(&mut self) -> Result<(), CodegenError> {
+    fn begin_body(&mut self, module_info: &ModuleInfo) -> Result<(), CodegenError> {
+        let start_of_code_block = self
+            .context
+            .append_basic_block(&self.function, "start_of_code");
+        let entry_end_inst = self
+            .builder
+            .build_unconditional_branch(&start_of_code_block);
+        self.builder.position_at_end(&start_of_code_block);
+
+        let cache_builder = self.context.create_builder();
+        cache_builder.position_before(&entry_end_inst);
+        let module_info =
+            unsafe { ::std::mem::transmute::<&ModuleInfo, &'static ModuleInfo>(module_info) };
+        let function = unsafe {
+            ::std::mem::transmute::<&FunctionValue, &'static FunctionValue>(&self.function)
+        };
+        let mut ctx = self
+            .intrinsics
+            .ctx(module_info, self.builder, function, cache_builder);
+
+        self.ctx = Some(ctx);
         Ok(())
     }
 
@@ -2637,6 +2658,12 @@ impl FunctionCodeGenerator<CodegenError> for LLVMFunctionCodeGenerator {
         //
         //        let cache_builder = context.create_builder();
         //        cache_builder.position_before(&entry_end_inst);
+        let op = match event {
+            Event::Wasm(x) => x,
+            Event::Internal(x) => {
+                return Ok(());
+            }
+        };
 
         let mut state = &mut self.state;
         let builder = self.builder;
@@ -2646,21 +2673,7 @@ impl FunctionCodeGenerator<CodegenError> for LLVMFunctionCodeGenerator {
         let locals = &self.locals;
         let info = module_info;
         let signatures = &self.signatures;
-
+        let mut ctx = self.ctx.as_mut().unwrap();
-        // TODO this should be done only once per function I believe
-        // just adding here to get compilation
-        let cache_builder = context.create_builder();
-        //        cache_builder.position_before(&entry_end_inst);
-        let mut ctx = intrinsics.ctx(info, builder, &function, cache_builder);
-        //            self.ctx;
-
-        let op = match event {
-            Event::Wasm(x) => x,
-            Event::Internal(x) => {
-                return Ok(());
-                //unimplemented!()
-            }
-        };
 
         let mut unreachable_depth = 0;
         if !state.reachable {
@@ -4724,12 +4737,6 @@ impl ModuleCodeGenerator<LLVMFunctionCodeGenerator, LLVMBackend, CodegenError>
         );
         let num_params = locals.len();
 
-        let start_of_code_block = self.context.append_basic_block(&function, "start_of_code");
-        let entry_end_inst = self
-            .builder
-            .build_unconditional_branch(&start_of_code_block);
-        self.builder.position_at_end(&start_of_code_block);
-
         let code = LLVMFunctionCodeGenerator {
             state,
             builder: unsafe { ::std::mem::transmute::<&Builder, &'static Builder>(&self.builder) },
@@ -4758,13 +4765,14 @@ impl ModuleCodeGenerator<LLVMFunctionCodeGenerator, LLVMBackend, CodegenError>
             intrinsics: unsafe {
                 ::std::mem::transmute::<&Intrinsics, &'static Intrinsics>(&self.intrinsics)
             },
+            ctx: None,
         };
         self.functions.push(code);
         Ok(self.functions.last_mut().unwrap())
     }
 
     fn finalize(self, module_info: &ModuleInfo) -> Result<LLVMBackend, CodegenError> {
-//         self.module.print_to_stderr();
+        //         self.module.print_to_stderr();
 
         generate_trampolines(
             module_info,

lib/runtime-core/src/codegen.rs

@@ -12,7 +12,9 @@ use smallvec::SmallVec;
 use std::fmt::Debug;
 use std::marker::PhantomData;
 use wasmparser::{Operator, Type as WpType};
+use std::fmt;
 
+#[derive(Debug)]
 pub enum Event<'a, 'b> {
     Internal(InternalEvent),
     Wasm(&'b Operator<'a>),
@@ -26,6 +28,19 @@ pub enum InternalEvent {
     GetInternal(u32),
 }
 
+impl fmt::Debug for InternalEvent {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            InternalEvent::FunctionBegin(_) => write!(f, "FunctionBegin"),
+            InternalEvent::FunctionEnd => write!(f, "FunctionEnd"),
+            InternalEvent::Breakpoint(_) => write!(f, "Breakpoint"),
+            InternalEvent::SetInternal(_) => write!(f, "SetInternal"),
+            InternalEvent::GetInternal(_) => write!(f, "GetInternal"),
+            _ => panic!("unknown event")
+        }
+    }
+}
+
 pub struct BkptInfo {}
 
 pub trait ModuleCodeGenerator<FCG: FunctionCodeGenerator<E>, RM: RunnableModule, E: Debug> {
@@ -246,7 +261,7 @@ pub trait FunctionCodeGenerator<E: Debug> {
     fn feed_local(&mut self, ty: WpType, n: usize) -> Result<(), E>;
 
     /// Called before the first call to `feed_opcode`.
-    fn begin_body(&mut self) -> Result<(), E>;
+    fn begin_body(&mut self, module_info: &ModuleInfo) -> Result<(), E>;
 
     /// Called for each operator.
     fn feed_event(&mut self, op: Event, module_info: &ModuleInfo) -> Result<(), E>;

lib/runtime-core/src/parse.rs

@@ -244,7 +244,7 @@ pub fn read_module<
                         ParserState::CodeOperator(ref op) => {
                             if !body_begun {
                                 body_begun = true;
-                                fcg.begin_body()
+                                fcg.begin_body(&info)
                                     .map_err(|x| LoadError::Codegen(format!("{:?}", x)))?;
                             }
                             middlewares

lib/singlepass-backend/src/codegen_x64.rs

@@ -1387,7 +1387,7 @@ impl FunctionCodeGenerator<CodegenError> for X64FunctionCode {
         Ok(())
     }
 
-    fn begin_body(&mut self) -> Result<(), CodegenError> {
+    fn begin_body(&mut self, module_info: &ModuleInfo) -> Result<(), CodegenError> {
         let a = self.assembler.as_mut().unwrap();
         a.emit_push(Size::S64, Location::GPR(GPR::RBP));
         a.emit_mov(Size::S64, Location::GPR(GPR::RSP), Location::GPR(GPR::RBP));