Start work on generating trampolines

lib/llvm-backend/src/trampolines.rs

@@ -0,0 +1,38 @@
+use inkwell::{
+    builder::Builder,
+    context::Context,
+    module::{Linkage, Module},
+    passes::PassManager,
+    types::{BasicType, BasicTypeEnum, FunctionType, PointerType},
+    values::{BasicValue, FunctionValue, PhiValue, PointerValue},
+    AddressSpace, FloatPredicate, IntPredicate,
+};
+use wasmer_runtime_core::{
+    module::ModuleInfo,
+    types::{SigIndex, FuncSig},
+    structures::{TypedIndex, SliceMap},
+};
+use crate::intrinsics::Intrinsics;
+
+pub fn generate_trampolines(info: &ModuleInfo, signatures: &SliceMap<SigIndex, FunctionType>, module: &Module, builder: &Builder, intrinsics: &Intrinsics) -> Result<(), String> {
+    let trampoline_sig = intrinsics.void_ty.fn_type(&[
+        intrinsics.ctx_ptr_ty, // vmctx ptr
+        intrinsics.i64_ptr_ty, // func ptr
+        intrinsics.i64_ptr_ty,
+        intrinsics.i64_ptr_ty,
+    ], false);
+
+    for (sig_index, sig) in info.signatures.iter() {
+
+    }
+}
+
+pub fn generate_trampoline(sig_index: usize, trampoline_sig: FunctionType, sig: &FuncSig, builder: &Builder, intrinsics: &Intrinsics) {
+    let function = module.add_function(
+        &format!("tramp{}", sig_index.index()),
+        signatures[sig_index],
+        Some(Linkage::External),
+    );
+
+
+}