[WIP] begin implementing "ABI hooks"

CMakeLists.txt

@@ -412,6 +412,7 @@ set(ZIG_SOURCES
     "${CMAKE_SOURCE_DIR}/src/codegen.cpp"
     "${CMAKE_SOURCE_DIR}/src/errmsg.cpp"
     "${CMAKE_SOURCE_DIR}/src/error.cpp"
+    "${CMAKE_SOURCE_DIR}/src/fn_abi.cpp"
     "${CMAKE_SOURCE_DIR}/src/ir.cpp"
     "${CMAKE_SOURCE_DIR}/src/ir_print.cpp"
     "${CMAKE_SOURCE_DIR}/src/link.cpp"

src/all_types.hpp

@@ -39,6 +39,7 @@ struct ZigWindowsSDK;
 struct Tld;
 struct TldExport;
 struct IrAnalyze;
+struct FnAbi;
 
 struct IrExecutable {
     ZigList<IrBasicBlock *> basic_block_list;
@@ -993,6 +994,7 @@ struct FnTypeId {
     CallingConvention cc;
     uint32_t alignment;
     TypeTableEntry *async_allocator_type;
+    FnAbi *abi_data;
 };
 
 uint32_t fn_type_id_hash(FnTypeId*);

src/analyze.cpp

@@ -9,6 +9,7 @@
 #include "ast_render.hpp"
 #include "config.h"
 #include "error.hpp"
+#include "fn_abi.hpp"
 #include "ir.hpp"
 #include "ir_print.hpp"
 #include "os.hpp"
@@ -1203,6 +1204,8 @@ TypeTableEntry *get_fn_type(CodeGen *g, FnTypeId *fn_type_id) {
         fn_type->di_type = ZigLLVMCreateSubroutineType(g->dbuilder, param_di_types, (int)(gen_param_index + 1), 0);
     }
 
+    fn_abi_visit_fn_type(g, fn_type_id);
+
     g->fn_type_table.put(&fn_type->data.fn.fn_type_id, fn_type);
 
     return fn_type;

src/codegen.cpp

@@ -944,7 +944,7 @@ static void gen_safety_crash(CodeGen *g, PanicMsgId msg_id) {
     gen_panic(g, get_panic_msg_ptr_val(g, msg_id), nullptr);
 }
 
-static LLVMValueRef get_memcpy_fn_val(CodeGen *g) {
+LLVMValueRef get_memcpy_fn_val(CodeGen *g) {
     if (g->memcpy_fn_val)
         return g->memcpy_fn_val;
 

src/codegen.hpp

@@ -11,6 +11,7 @@
 #include "parser.hpp"
 #include "errmsg.hpp"
 #include "target.hpp"
+#include "zig_llvm.h"
 
 #include <stdio.h>
 
@@ -61,5 +62,6 @@ void codegen_translate_c(CodeGen *g, Buf *path);
 
 Buf *codegen_generate_builtin_source(CodeGen *g);
 
+LLVMValueRef get_memcpy_fn_val(CodeGen *g);
 
 #endif