Added support for global state when using 'WinMain' instead of traditional 'main' entry point

Author: IsaacShelton

Makefile

@@ -25,7 +25,7 @@ UNIX_LLVM_BUILD_INCLUDE=
 UNIX_LIBCURL_LIB=/opt/homebrew/opt/curl/lib
 UNIX_LIBCURL_INCLUDE=/opt/homebrew/opt/curl/lib
 UNIX_LIBCURL_BUILD_INCLUDE=
-DEBUG_ADDRESS_SANITIZE=true
+DEBUG_ADDRESS_SANITIZE=false
 #UNIX_CC=gcc
 #UNIX_CXX=g++
 #UNIX_LLVM_LIB=/usr/lib/llvm-7/lib

include/AST/ast.h

@@ -72,6 +72,7 @@ typedef struct {
 #define AST_FUNC_AUTOGEN     TRAIT_9
 #define AST_FUNC_VARIADIC    TRAIT_A
 #define AST_FUNC_IMPLICIT    TRAIT_B
+#define AST_FUNC_WINMAIN     TRAIT_C
 
 // Additional AST function traits for builtin uses
 #define AST_FUNC_WARN_BAD_PRINTF_FORMAT TRAIT_2_1

src/AST/ast.c

@@ -873,6 +873,9 @@ void ast_func_create_template(ast_func_t *func, strong_cstr_t name, bool is_stdc
     if(is_stdcall)                     func->traits |= AST_FUNC_STDCALL;
     if(is_foreign)                     func->traits |= AST_FUNC_FOREIGN;
     if(is_implicit)                    func->traits |= AST_FUNC_IMPLICIT;
+
+    // Handle WinMain
+    if(strcmp(name, "WinMain") == 0 && export_as && strcmp(export_as, "WinMain") == 0)  func->traits |= AST_FUNC_WINMAIN;
 }
 
 bool ast_func_is_polymorphic(ast_func_t *func){

src/BKEND/ir_to_llvm.c

@@ -1612,7 +1612,7 @@ errorcode_t ir_to_llvm(compiler_t *compiler, object_t *object){
         const char *linker = "ld.exe"; // May need to change depending on system etc.
         const char *linker_options = "--start-group";
         const char *root = compiler->root;
-        const char *subsystem = (compiler->traits & COMPILER_WINDOWED) ? "-subsystem,windows " : "";
+        const char *subsystem = (compiler->traits & COMPILER_WINDOWED) ? "--subsystem windows " : "";
         link_command = mallocandsprintf("\"\"%s%s\" -static \"%scrt2.o\" \"%scrtbegin.o\" %s%s \"%s\" \"%slibdep.a\" C:/Windows/System32/msvcrt.dll %s-o \"%s\"\"", root, linker, root, root, linker_options, linker_additional, object_filename, root, subsystem, compiler->output_filename);
     }
 	#else
@@ -1622,7 +1622,7 @@ errorcode_t ir_to_llvm(compiler_t *compiler, object_t *object){
         const char *linker = "cross-compile-windows/x86_64-w64-mingw32-ld";
         const char *linker_options = "";
         const char *root = compiler->root;
-        const char *subsystem = (compiler->traits & COMPILER_WINDOWED) ? "-subsystem,windows " : "";
+        const char *subsystem = (compiler->traits & COMPILER_WINDOWED) ? "--subsystem windows " : "";
 
         strong_cstr_t cross_linker = mallocandsprintf("%s%s", compiler->root, linker);
         if(!file_exists(cross_linker)){

src/IRGEN/ir_gen.c

@@ -340,7 +340,7 @@ errorcode_t ir_gen_functions_body_statements(compiler_t *compiler, object_t *obj
     ast_expr_t **statements = ast_func->statements;
     length_t statements_length = ast_func->statements_length;
 
-    if(ast_func->traits & AST_FUNC_MAIN){
+    if(ast_func->traits & AST_FUNC_MAIN || ast_func->traits & AST_FUNC_WINMAIN){
         // Initialize all global variables
         if(ir_gen_globals_init(&builder)){
             module_func->basicblocks = builder.basicblocks;
@@ -375,7 +375,7 @@ errorcode_t ir_gen_functions_body_statements(compiler_t *compiler, object_t *obj
         // Make sure to update references that may have been invalidated
         ast_func = &object->ast.funcs[ast_func_id];
 
-        if(ast_func->traits & AST_FUNC_MAIN){
+        if(ast_func->traits & AST_FUNC_MAIN || ast_func->traits & AST_FUNC_WINMAIN){
             handle_deference_for_globals(&builder);
             build_deinit_svars(&builder);
         }

src/IRGEN/ir_gen_stmt.c

@@ -530,6 +530,7 @@ errorcode_t ir_gen_stmt_return(ir_builder_t *builder, ast_expr_return_t *stmt, b
     bool is_in_main_function;
     bool is_in_pass_function;
     bool is_in_defer_function;
+    bool is_in_winmain_function;
     bool autogen_enabled;
 
     // 'ast_func' is only guaranteed to be valid within this scope.
@@ -542,6 +543,7 @@ errorcode_t ir_gen_stmt_return(ir_builder_t *builder, ast_expr_return_t *stmt, b
         is_in_main_function  = ast_func->traits & AST_FUNC_MAIN;
         is_in_pass_function  = ast_func->traits & AST_FUNC_PASS;
         is_in_defer_function = ast_func->traits & AST_FUNC_DEFER;
+        is_in_winmain_function  = ast_func->traits & AST_FUNC_WINMAIN;
         autogen_enabled      = ast_func->traits & AST_FUNC_AUTOGEN;
     }
 
@@ -602,7 +604,7 @@ errorcode_t ir_gen_stmt_return(ir_builder_t *builder, ast_expr_return_t *stmt, b
     if(ir_gen_variable_deference(builder, NULL)) return FAILURE;
 
     // Make '__defer__()' calls for global variables and (anonymous) static variables running out of scope
-    if(is_in_main_function){
+    if(is_in_main_function || is_in_winmain_function){
         handle_deference_for_globals(builder);
         build_deinit_svars(builder);
     }