From e8530ca883edd79c188443ced54cea2c5d3ad4ed Mon Sep 17 00:00:00 2001
From: gingerBill <ginger.bill.22@gmail.com>
Date: Tue, 16 Aug 2016 20:08:40 +0100
Subject: [PATCH] Win32 Demo: OpenGL Context

---
 examples/main.ll           | 580 ++++++++++++++++++++++++++++++-------
 examples/main.odin         |  80 ++---
 examples/win32.odin        | 106 ++++++-
 misc/shell.bat             |   2 -
 src/checker/checker.cpp    |   8 -
 src/checker/expr.cpp       |   9 +-
 src/checker/stmt.cpp       |   7 -
 src/checker/type.cpp       |  13 +-
 src/codegen/print_llvm.cpp |  10 +-
 src/codegen/ssa.cpp        |   7 +-
 src/main.cpp               |   2 +-
 src/parser.cpp             |  38 +--
 src/printer.cpp            |   8 -
 src/tokenizer.cpp          |   1 -
 14 files changed, 647 insertions(+), 224 deletions(-)

diff --git a/examples/main.ll b/examples/main.ll
index ed7f195a1..6127797ae 100644
--- a/examples/main.ll
+++ b/examples/main.ll
@@ -1,117 +1,451 @@
 %.string = type {i8*, i64} ; Basic_string
 %.rawptr = type i8* ; Basic_rawptr
 
+%HANDLE = type %.rawptr
+%HWND = type %.rawptr
+%HDC = type %.rawptr
+%HINSTANCE = type %.rawptr
+%HICON = type %.rawptr
+%HCURSOR = type %.rawptr
+%HMENU = type %.rawptr
+%HBRUSH = type %.rawptr
+%WPARAM = type i64
+%LPARAM = type i64
+%LRESULT = type i64
+%ATOM = type i16
+%POINT = type {i32, i32}
+%BOOL = type i32
+%WNDPROC = type %LRESULT (%HWND, i32, %WPARAM, %LPARAM)*
+%WNDCLASSEXA = type {i32, i32, %WNDPROC, i32, i32, %HINSTANCE, %HICON, %HCURSOR, %HBRUSH, i8*, i8*, %HICON}
+%MSG = type {%HWND, i32, %WPARAM, %LPARAM, i32, %POINT}
+%HGLRC = type %.rawptr
+%PROC = type void ()*
+%wglCreateContextAttribsARBType = type %HGLRC (%HDC, %.rawptr, i32*)*
+%PIXELFORMATDESCRIPTOR = type {i32, i32, i32, i8, i8, i8, i8, i8, i8, i8, i8, i8, i8, i8, i8, i8, i8, i8, i8, i8, i8, i8, i8, i32, i32, i32}
 declare void @llvm.memmove.p0i8.p0i8.i64(i8*, i8*, i64, i32, i1) argmemonly nounwind 
 
+@win32_perf_count_freq = global i64 zeroinitializer
+define double @time_now() {
+entry.-.0:
+	%0 = load i64, i64* @win32_perf_count_freq, align 8
+	%1 = icmp eq i64 %0, 0
+	br i1 %1, label %if.then.-.1, label %if.done.-.2
+
+if.then.-.1:
+	call void @llvm.debugtrap()
+	br label %if.done.-.2
+
+if.done.-.2:
+	%2 = alloca i64, align 8 ; counter
+	store i64 zeroinitializer, i64* %2
+	%3 = getelementptr inbounds i64, i64* %2
+	%4 = call i32 @QueryPerformanceCounter(i64* %3)
+	%5 = alloca double, align 8 ; result
+	store double zeroinitializer, double* %5
+	%6 = load i64, i64* @win32_perf_count_freq, align 8
+	%7 = sitofp i64 %6 to double
+	%8 = load i64, i64* %2, align 8
+	%9 = sitofp i64 %8 to double
+	%10 = fdiv double %9, %7
+	store double %10, double* %5
+	%11 = load double, double* %5, align 8
+	ret double %11
+}
+
+define void @win32_print_last_error() {
+entry.-.0:
+	%0 = alloca i64, align 8 ; err_code
+	store i64 zeroinitializer, i64* %0
+	%1 = call i32 @GetLastError()
+	%2 = zext i32 %1 to i64
+	store i64 %2, i64* %0
+	%3 = load i64, i64* %0, align 8
+	%4 = icmp ne i64 %3, 0
+	br i1 %4, label %if.then.-.1, label %if.done.-.2
+
+if.then.-.1:
+	%5 = getelementptr inbounds [14 x i8], [14 x i8]* @.str0, i64 0, i64 0
+	%6 = alloca %.string, align 8 
+	store %.string zeroinitializer, %.string* %6
+	%7 = getelementptr inbounds %.string, %.string* %6, i64 0, i32 0
+	%8 = getelementptr inbounds %.string, %.string* %6, i64 0, i32 1
+	store i8* %5, i8** %7
+	store i64 14, i64* %8
+	%9 = load %.string, %.string* %6, align 8
+	call void @print_string(%.string %9)
+	%10 = load i64, i64* %0, align 8
+	call void @print_int(i64 %10)
+	%11 = getelementptr inbounds [1 x i8], [1 x i8]* @.str1, i64 0, i64 0
+	%12 = alloca %.string, align 8 
+	store %.string zeroinitializer, %.string* %12
+	%13 = getelementptr inbounds %.string, %.string* %12, i64 0, i32 0
+	%14 = getelementptr inbounds %.string, %.string* %12, i64 0, i32 1
+	store i8* %11, i8** %13
+	store i64 1, i64* %14
+	%15 = load %.string, %.string* %12, align 8
+	call void @print_string(%.string %15)
+	br label %if.done.-.2
+
+if.done.-.2:
+	ret void
+}
+
 define void @main() {
 entry.-.0:
 	call void @__$startup_runtime()
-	%0 = getelementptr inbounds [8 x i8], [8 x i8]* @.str0, i64 0, i64 0
-	%1 = alloca %.string, align 8 
-	store %.string zeroinitializer, %.string* %1
-	%2 = getelementptr inbounds %.string, %.string* %1, i64 0, i32 0
-	%3 = getelementptr inbounds %.string, %.string* %1, i64 0, i32 1
-	store i8* %0, i8** %2
-	store i64 8, i64* %3
-	%4 = load %.string, %.string* %1, align 8
-	call void @print_string(%.string %4)
-	br label %for.init.-.1
+	%0 = alloca %WNDCLASSEXA, align 8 ; wc
+	store %WNDCLASSEXA zeroinitializer, %WNDCLASSEXA* %0
+	%1 = alloca %HINSTANCE, align 8 ; instance
+	store %HINSTANCE zeroinitializer, %HINSTANCE* %1
+	%2 = call %HINSTANCE @GetModuleHandleA(i8* null)
+	store %HINSTANCE %2, %HINSTANCE* %1
+	%3 = getelementptr inbounds i64, i64* @win32_perf_count_freq
+	%4 = call i32 @QueryPerformanceFrequency(i64* %3)
+	%5 = alloca i8*, align 8 ; class_name
+	store i8* zeroinitializer, i8** %5
+	%6 = getelementptr inbounds [18 x i8], [18 x i8]* @.str2, i64 0, i64 0
+	%7 = alloca %.string, align 8 
+	store %.string zeroinitializer, %.string* %7
+	%8 = getelementptr inbounds %.string, %.string* %7, i64 0, i32 0
+	%9 = getelementptr inbounds %.string, %.string* %7, i64 0, i32 1
+	store i8* %6, i8** %8
+	store i64 18, i64* %9
+	%10 = load %.string, %.string* %7, align 8
+	%11 = call i8* @main$to_c_string-0(%.string %10)
+	store i8* %11, i8** %5
+	%12 = alloca i8*, align 8 ; title
+	store i8* zeroinitializer, i8** %12
+	%13 = getelementptr inbounds [18 x i8], [18 x i8]* @.str3, i64 0, i64 0
+	%14 = alloca %.string, align 8 
+	store %.string zeroinitializer, %.string* %14
+	%15 = getelementptr inbounds %.string, %.string* %14, i64 0, i32 0
+	%16 = getelementptr inbounds %.string, %.string* %14, i64 0, i32 1
+	store i8* %13, i8** %15
+	store i64 18, i64* %16
+	%17 = load %.string, %.string* %14, align 8
+	%18 = call i8* @main$to_c_string-0(%.string %17)
+	store i8* %18, i8** %12
+	%19 = getelementptr inbounds %WNDCLASSEXA, %WNDCLASSEXA* %0, i64 0, i32 0
+	store i32 80, i32* %19
+	%20 = getelementptr inbounds %WNDCLASSEXA, %WNDCLASSEXA* %0, i64 0, i32 1
+	store i32 3, i32* %20
+	%21 = getelementptr inbounds %WNDCLASSEXA, %WNDCLASSEXA* %0, i64 0, i32 5
+	%22 = load %HINSTANCE, %HINSTANCE* %1, align 8
+	store %HINSTANCE %22, %HINSTANCE* %21
+	%23 = getelementptr inbounds %WNDCLASSEXA, %WNDCLASSEXA* %0, i64 0, i32 10
+	%24 = load i8*, i8** %5, align 8
+	store i8* %24, i8** %23
+	%25 = getelementptr inbounds %WNDCLASSEXA, %WNDCLASSEXA* %0, i64 0, i32 2
+	store %WNDPROC @main$1, %WNDPROC* %25
+	%26 = getelementptr inbounds %WNDCLASSEXA, %WNDCLASSEXA* %0
+	%27 = call %ATOM @RegisterClassExA(%WNDCLASSEXA* %26)
+	%28 = icmp eq i16 %27, 0
+	br i1 %28, label %if.then.-.1, label %if.done.-.4
 
-for.init.-.1:
-	%5 = alloca i64, align 8 ; i
-	store i64 zeroinitializer, i64* %5
-	store i64 0, i64* %5
-	br label %for.loop.-.3
+if.then.-.1:
+	br label %defer.-.2
 
-for.body.-.2:
-	%6 = load i64, i64* %5, align 8
-	%7 = icmp sgt i64 %6, 2
-	br i1 %7, label %if.then.-.5, label %if.done.-.9
+defer.-.2:
+	%29 = load i8*, i8** %12, align 8
+	call void @free(%.rawptr %29)
+	br label %defer.-.3
 
-for.loop.-.3:
-	%8 = load i64, i64* %5, align 8
-	%9 = icmp slt i64 %8, 4
-	br i1 %9, label %for.body.-.2, label %for.done.-.13
+defer.-.3:
+	%30 = load i8*, i8** %5, align 8
+	call void @free(%.rawptr %30)
+	ret void
 
-for.post.-.4:
-	%10 = load i64, i64* %5, align 8
-	%11 = add i64 %10, 1
-	store i64 %11, i64* %5
-	br label %for.loop.-.3
+if.done.-.4:
+	%31 = alloca %HWND, align 8 ; hwnd
+	store %HWND zeroinitializer, %HWND* %31
+	%32 = load i8*, i8** %5, align 8
+	%33 = load i8*, i8** %12, align 8
+	%34 = load %HINSTANCE, %HINSTANCE* %1, align 8
+	%35 = call %HWND @CreateWindowExA(i32 0, i8* %32, i8* %33, i32 281673728, i32 2147483648, i32 2147483648, i32 854, i32 480, %HWND null, %HMENU null, %HINSTANCE %34, %.rawptr null)
+	store %HWND %35, %HWND* %31
+	%36 = load %HWND, %HWND* %31, align 8
+	%37 = icmp eq %.rawptr %36, null
+	br i1 %37, label %if.then.-.5, label %if.done.-.8
 
 if.then.-.5:
+	call void @win32_print_last_error()
 	br label %defer.-.6
 
 defer.-.6:
-	%12 = getelementptr inbounds [6 x i8], [6 x i8]* @.str1, i64 0, i64 0
-	%13 = alloca %.string, align 8 
-	store %.string zeroinitializer, %.string* %13
-	%14 = getelementptr inbounds %.string, %.string* %13, i64 0, i32 0
-	%15 = getelementptr inbounds %.string, %.string* %13, i64 0, i32 1
-	store i8* %12, i8** %14
-	store i64 6, i64* %15
-	%16 = load %.string, %.string* %13, align 8
-	call void @print_string(%.string %16)
+	%38 = load i8*, i8** %12, align 8
+	call void @free(%.rawptr %38)
 	br label %defer.-.7
 
 defer.-.7:
-	%17 = load i64, i64* %5, align 8
-	call void @print_int(i64 %17)
-	call void @print_rune(i32 10)
-	br label %for.done.-.13
-
-defer.-.8:
-	%18 = getelementptr inbounds [6 x i8], [6 x i8]* @.str2, i64 0, i64 0
-	%19 = alloca %.string, align 8 
-	store %.string zeroinitializer, %.string* %19
-	%20 = getelementptr inbounds %.string, %.string* %19, i64 0, i32 0
-	%21 = getelementptr inbounds %.string, %.string* %19, i64 0, i32 1
-	store i8* %18, i8** %20
-	store i64 6, i64* %21
-	%22 = load %.string, %.string* %19, align 8
-	call void @print_string(%.string %22)
-	br label %if.done.-.9
-
-if.done.-.9:
-	%23 = load i64, i64* %5, align 8
-	%24 = icmp eq i64 %23, 2
-	br i1 %24, label %if.then.-.10, label %if.done.-.11
-
-if.then.-.10:
-	br label %if.done.-.11
-
-if.done.-.11:
-	br label %defer.-.12
-
-defer.-.12:
-	%25 = load i64, i64* %5, align 8
-	call void @print_int(i64 %25)
-	call void @print_rune(i32 10)
-	br label %for.post.-.4
-
-for.done.-.13:
-	%26 = getelementptr inbounds [13 x i8], [13 x i8]* @.str3, i64 0, i64 0
-	%27 = alloca %.string, align 8 
-	store %.string zeroinitializer, %.string* %27
-	%28 = getelementptr inbounds %.string, %.string* %27, i64 0, i32 0
-	%29 = getelementptr inbounds %.string, %.string* %27, i64 0, i32 1
-	store i8* %26, i8** %28
-	store i64 13, i64* %29
-	%30 = load %.string, %.string* %27, align 8
-	call void @print_string(%.string %30)
-	br label %defer.-.14
-
-defer.-.14:
-	%31 = getelementptr inbounds [6 x i8], [6 x i8]* @.str4, i64 0, i64 0
-	%32 = alloca %.string, align 8 
-	store %.string zeroinitializer, %.string* %32
-	%33 = getelementptr inbounds %.string, %.string* %32, i64 0, i32 0
-	%34 = getelementptr inbounds %.string, %.string* %32, i64 0, i32 1
-	store i8* %31, i8** %33
-	store i64 6, i64* %34
-	%35 = load %.string, %.string* %32, align 8
-	call void @print_string(%.string %35)
+	%39 = load i8*, i8** %5, align 8
+	call void @free(%.rawptr %39)
 	ret void
+
+if.done.-.8:
+	%40 = alloca %HDC, align 8 ; dc
+	store %HDC zeroinitializer, %HDC* %40
+	%41 = load %HWND, %HWND* %31, align 8
+	%42 = call %HDC @GetDC(%HANDLE %41)
+	store %HDC %42, %HDC* %40
+	%43 = alloca %HGLRC, align 8 ; opengl_context
+	store %HGLRC zeroinitializer, %HGLRC* %43
+	%44 = alloca [8 x i32], align 4 ; attribs
+	store [8 x i32] zeroinitializer, [8 x i32]* %44
+	%45 = alloca %PIXELFORMATDESCRIPTOR, align 4 ; pfd
+	store %PIXELFORMATDESCRIPTOR zeroinitializer, %PIXELFORMATDESCRIPTOR* %45
+	%46 = getelementptr inbounds %PIXELFORMATDESCRIPTOR, %PIXELFORMATDESCRIPTOR* %45, i64 0, i32 0
+	store i32 44, i32* %46
+	%47 = getelementptr inbounds %PIXELFORMATDESCRIPTOR, %PIXELFORMATDESCRIPTOR* %45, i64 0, i32 1
+	store i32 1, i32* %47
+	%48 = getelementptr inbounds %PIXELFORMATDESCRIPTOR, %PIXELFORMATDESCRIPTOR* %45, i64 0, i32 2
+	store i32 37, i32* %48
+	%49 = getelementptr inbounds %PIXELFORMATDESCRIPTOR, %PIXELFORMATDESCRIPTOR* %45, i64 0, i32 3
+	store i8 0, i8* %49
+	%50 = getelementptr inbounds %PIXELFORMATDESCRIPTOR, %PIXELFORMATDESCRIPTOR* %45, i64 0, i32 4
+	store i8 32, i8* %50
+	%51 = getelementptr inbounds %PIXELFORMATDESCRIPTOR, %PIXELFORMATDESCRIPTOR* %45, i64 0, i32 11
+	store i8 8, i8* %51
+	%52 = getelementptr inbounds %PIXELFORMATDESCRIPTOR, %PIXELFORMATDESCRIPTOR* %45, i64 0, i32 18
+	store i8 24, i8* %52
+	%53 = getelementptr inbounds %PIXELFORMATDESCRIPTOR, %PIXELFORMATDESCRIPTOR* %45, i64 0, i32 19
+	store i8 8, i8* %53
+	%54 = getelementptr inbounds %PIXELFORMATDESCRIPTOR, %PIXELFORMATDESCRIPTOR* %45, i64 0, i32 21
+	store i8 0, i8* %54
+	%55 = load %HDC, %HDC* %40, align 8
+	%56 = load %HDC, %HDC* %40, align 8
+	%57 = getelementptr inbounds %PIXELFORMATDESCRIPTOR, %PIXELFORMATDESCRIPTOR* %45
+	%58 = call i32 @ChoosePixelFormat(%HDC %56, %PIXELFORMATDESCRIPTOR* %57)
+	%59 = call %BOOL @SetPixelFormat(%HDC %55, i32 %58, %PIXELFORMATDESCRIPTOR* null)
+	%60 = load %HDC, %HDC* %40, align 8
+	%61 = call %HGLRC @wglCreateContext(%HDC %60)
+	store %HGLRC %61, %HGLRC* %43
+	%62 = load %HDC, %HDC* %40, align 8
+	%63 = load %HGLRC, %HGLRC* %43, align 8
+	%64 = call %BOOL @wglMakeCurrent(%HDC %62, %HGLRC %63)
+	%65 = getelementptr inbounds [8 x i32], [8 x i32]* %44, i64 0, i64 0
+	%66 = getelementptr i32, i32* %65, i64 0
+	store i32 8337, i32* %66
+	%67 = getelementptr inbounds [8 x i32], [8 x i32]* %44, i64 0, i64 0
+	%68 = getelementptr i32, i32* %67, i64 1
+	store i32 2, i32* %68
+	%69 = getelementptr inbounds [8 x i32], [8 x i32]* %44, i64 0, i64 0
+	%70 = getelementptr i32, i32* %69, i64 2
+	store i32 8338, i32* %70
+	%71 = getelementptr inbounds [8 x i32], [8 x i32]* %44, i64 0, i64 0
+	%72 = getelementptr i32, i32* %71, i64 3
+	store i32 1, i32* %72
+	%73 = getelementptr inbounds [8 x i32], [8 x i32]* %44, i64 0, i64 0
+	%74 = getelementptr i32, i32* %73, i64 4
+	store i32 37158, i32* %74
+	%75 = getelementptr inbounds [8 x i32], [8 x i32]* %44, i64 0, i64 0
+	%76 = getelementptr i32, i32* %75, i64 5
+	store i32 2, i32* %76
+	%77 = getelementptr inbounds [8 x i32], [8 x i32]* %44, i64 0, i64 0
+	%78 = getelementptr i32, i32* %77, i64 6
+	store i32 0, i32* %78
+	%79 = alloca %.string, align 8 ; wgl_string
+	store %.string zeroinitializer, %.string* %79
+	%80 = getelementptr inbounds [27 x i8], [27 x i8]* @.str4, i64 0, i64 0
+	%81 = alloca %.string, align 8 
+	store %.string zeroinitializer, %.string* %81
+	%82 = getelementptr inbounds %.string, %.string* %81, i64 0, i32 0
+	%83 = getelementptr inbounds %.string, %.string* %81, i64 0, i32 1
+	store i8* %80, i8** %82
+	store i64 27, i64* %83
+	%84 = load %.string, %.string* %81, align 8
+	store %.string %84, %.string* %79
+	%85 = alloca %wglCreateContextAttribsARBType, align 8 ; wglCreateContextAttribsARB
+	store %wglCreateContextAttribsARBType zeroinitializer, %wglCreateContextAttribsARBType* %85
+	%86 = getelementptr inbounds %.string, %.string* %79, i64 0, i32 0
+	%87 = load i8*, i8** %86, align 8
+	%88 = getelementptr i8, i8* %87, i64 0
+	%89 = getelementptr inbounds i8, i8* %88
+	%90 = call %PROC @wglGetProcAddress(i8* %89)
+	%91 = bitcast void ()* %90 to %HGLRC (%HDC, %.rawptr, i32*)*
+	%92 = bitcast %HGLRC (%HDC, %.rawptr, i32*)* %91 to %HGLRC (%HDC, %.rawptr, i32*)*
+	store %wglCreateContextAttribsARBType %92, %wglCreateContextAttribsARBType* %85
+	%93 = alloca %HGLRC, align 8 ; rc
+	store %HGLRC zeroinitializer, %HGLRC* %93
+	%94 = load %wglCreateContextAttribsARBType, %wglCreateContextAttribsARBType* %85, align 8
+	%95 = load %HDC, %HDC* %40, align 8
+	%96 = getelementptr inbounds [8 x i32], [8 x i32]* %44, i64 0, i64 0
+	%97 = getelementptr i32, i32* %96, i64 0
+	%98 = getelementptr inbounds i32, i32* %97
+	%99 = call %HGLRC %94(%HDC %95, %.rawptr null, i32* %98)
+	store %HGLRC %99, %HGLRC* %93
+	%100 = load %HDC, %HDC* %40, align 8
+	%101 = load %HGLRC, %HGLRC* %93, align 8
+	%102 = call %BOOL @wglMakeCurrent(%HDC %100, %HGLRC %101)
+	%103 = load %HDC, %HDC* %40, align 8
+	%104 = call %BOOL @SwapBuffers(%HDC %103)
+	%105 = alloca double, align 8 ; start_time
+	store double zeroinitializer, double* %105
+	%106 = call double @time_now()
+	store double %106, double* %105
+	%107 = alloca i1, align 1 ; running
+	store i1 zeroinitializer, i1* %107
+	store i1 true, i1* %107
+	br label %for.loop.-.10
+
+for.body.-.9:
+	%108 = alloca double, align 8 ; curr_time
+	store double zeroinitializer, double* %108
+	%109 = call double @time_now()
+	store double %109, double* %108
+	%110 = alloca double, align 8 ; dt
+	store double zeroinitializer, double* %110
+	%111 = load double, double* %105, align 8
+	%112 = load double, double* %108, align 8
+	%113 = fsub double %112, %111
+	store double %113, double* %110
+	%114 = load double, double* %110, align 8
+	%115 = fcmp ogt double %114, 0x4000000000000000
+	br i1 %115, label %if.then.-.11, label %if.done.-.12
+
+for.loop.-.10:
+	%116 = load i1, i1* %107, align 1
+	br i1 %116, label %for.body.-.9, label %for.done.-.22
+
+if.then.-.11:
+	store i1 false, i1* %107
+	br label %if.done.-.12
+
+if.done.-.12:
+	%117 = alloca %MSG, align 8 ; msg
+	store %MSG zeroinitializer, %MSG* %117
+	br label %for.body.-.13
+
+for.body.-.13:
+	%118 = alloca i1, align 1 ; ok
+	store i1 zeroinitializer, i1* %118
+	%119 = getelementptr inbounds %MSG, %MSG* %117
+	%120 = call %BOOL @PeekMessageA(%MSG* %119, %HWND null, i32 0, i32 0, i32 1)
+	%121 = icmp ne i32 %120, 0
+	store i1 %121, i1* %118
+	%122 = load i1, i1* %118, align 1
+	br i1 %122, label %if.done.-.15, label %if.then.-.14
+
+if.then.-.14:
+	br label %for.done.-.21
+
+if.done.-.15:
+	%123 = getelementptr inbounds %MSG, %MSG* %117, i64 0, i32 1
+	%124 = load i32, i32* %123, align 4
+	%125 = icmp eq i32 %124, 18
+	br i1 %125, label %if.then.-.16, label %if.else.-.17
+
+if.then.-.16:
+	br label %defer.-.18
+
+if.else.-.17:
+	%126 = getelementptr inbounds %MSG, %MSG* %117
+	%127 = call %BOOL @TranslateMessage(%MSG* %126)
+	%128 = getelementptr inbounds %MSG, %MSG* %117
+	%129 = call %LRESULT @DispatchMessageA(%MSG* %128)
+	br label %if.done.-.20
+
+defer.-.18:
+	%130 = load i8*, i8** %12, align 8
+	call void @free(%.rawptr %130)
+	br label %defer.-.19
+
+defer.-.19:
+	%131 = load i8*, i8** %5, align 8
+	call void @free(%.rawptr %131)
+	ret void
+
+if.done.-.20:
+	br label %for.body.-.13
+
+for.done.-.21:
+	%132 = load %HDC, %HDC* %40, align 8
+	%133 = call %BOOL @SwapBuffers(%HDC %132)
+	call void @sleep_ms(i32 2)
+	br label %for.loop.-.10
+
+for.done.-.22:
+	br label %defer.-.23
+
+defer.-.23:
+	%134 = load i8*, i8** %12, align 8
+	call void @free(%.rawptr %134)
+	br label %defer.-.24
+
+defer.-.24:
+	%135 = load i8*, i8** %5, align 8
+	call void @free(%.rawptr %135)
+	ret void
+}
+
+define i8* @main$to_c_string-0(%.string %s) {
+entry.-.0:
+	%0 = alloca %.string, align 8 ; s
+	store %.string zeroinitializer, %.string* %0
+	store %.string %s, %.string* %0
+	%1 = alloca i8*, align 8 ; c_str
+	store i8* zeroinitializer, i8** %1
+	%2 = getelementptr inbounds %.string, %.string* %0, i64 0, i32 1
+	%3 = load i64, i64* %2, align 8
+	%4 = add i64 %3, 1
+	%5 = call %.rawptr @malloc(i64 %4)
+	%6 = bitcast %.rawptr %5 to i8*
+	store i8* %6, i8** %1
+	%7 = load i8*, i8** %1, align 8
+	%8 = getelementptr inbounds %.string, %.string* %0, i64 0, i32 0
+	%9 = load i8*, i8** %8, align 8
+	%10 = getelementptr i8, i8* %9, i64 0
+	%11 = getelementptr inbounds i8, i8* %10
+	%12 = getelementptr inbounds %.string, %.string* %0, i64 0, i32 1
+	%13 = load i64, i64* %12, align 8
+	%14 = call i32 @memcpy(%.rawptr %7, %.rawptr %11, i64 %13)
+	%15 = load i8*, i8** %1, align 8
+	%16 = getelementptr inbounds %.string, %.string* %0, i64 0, i32 1
+	%17 = load i64, i64* %16, align 8
+	%18 = getelementptr i8, i8* %15, i64 %17
+	store i8 0, i8* %18
+	%19 = load i8*, i8** %1, align 8
+	ret i8* %19
+}
+
+define %LRESULT @main$1(%HWND %hwnd, i32 %msg, %WPARAM %wparam, %LPARAM %lparam) noinline {
+entry.-.0:
+	%0 = alloca %HWND, align 8 ; hwnd
+	store %HWND zeroinitializer, %HWND* %0
+	store %HWND %hwnd, %HWND* %0
+	%1 = alloca i32, align 4 ; msg
+	store i32 zeroinitializer, i32* %1
+	store i32 %msg, i32* %1
+	%2 = alloca %WPARAM, align 8 ; wparam
+	store %WPARAM zeroinitializer, %WPARAM* %2
+	store %WPARAM %wparam, %WPARAM* %2
+	%3 = alloca %LPARAM, align 8 ; lparam
+	store %LPARAM zeroinitializer, %LPARAM* %3
+	store %LPARAM %lparam, %LPARAM* %3
+	%4 = load i32, i32* %1, align 4
+	%5 = icmp eq i32 %4, 2
+	br i1 %5, label %if.then.-.1, label %cmp-or.-.3
+
+if.then.-.1:
+	call void @ExitProcess(i32 0)
+	ret %LRESULT 0
+
+cmp-or.-.2:
+	%6 = load i32, i32* %1, align 4
+	%7 = icmp eq i32 %6, 18
+	br i1 %7, label %if.then.-.1, label %if.done.-.4
+
+cmp-or.-.3:
+	%8 = load i32, i32* %1, align 4
+	%9 = icmp eq i32 %8, 16
+	br i1 %9, label %if.then.-.1, label %cmp-or.-.2
+
+if.done.-.4:
+	%10 = load %HWND, %HWND* %0, align 8
+	%11 = load i32, i32* %1, align 4
+	%12 = load %WPARAM, %WPARAM* %2, align 8
+	%13 = load %LPARAM, %LPARAM* %3, align 8
+	%14 = call %LRESULT @DefWindowProcA(%HWND %10, i32 %11, %WPARAM %12, %LPARAM %13)
+	ret i64 %14
 }
 
 define void @print_string(%.string %s) {
@@ -749,6 +1083,54 @@ if.done.-.3:
 	ret void
 }
 
+declare %HANDLE @GetStdHandle(i32 %h) ; foreign
+declare i32 @CloseHandle(%HANDLE %h) ; foreign
+declare i32 @WriteFileA(%HANDLE %h, %.rawptr %buf, i32 %len, i32* %written_result, %.rawptr %overlapped) ; foreign
+declare i32 @GetLastError() ; foreign
+declare void @ExitProcess(i32 %exit_code) ; foreign
+declare %HWND @GetDesktopWindow() ; foreign
+declare i32 @GetCursorPos(%POINT* %p) ; foreign
+declare i32 @ScreenToClient(%HWND %h, %POINT* %p) ; foreign
+declare %HINSTANCE @GetModuleHandleA(i8* %module_name) ; foreign
+declare i32 @QueryPerformanceFrequency(i64* %result) ; foreign
+declare i32 @QueryPerformanceCounter(i64* %result) ; foreign
+define void @sleep_ms(i32 %ms) {
+entry.-.0:
+	%0 = alloca i32, align 4 ; ms
+	store i32 zeroinitializer, i32* %0
+	store i32 %ms, i32* %0
+	%1 = load i32, i32* %0, align 4
+	%2 = call i32 @Sleep(i32 %1)
+	ret void
+}
+
+declare i32 @Sleep(i32 %ms) declare void @OutputDebugStringA(i8* %c_str) ; foreign
+declare %ATOM @RegisterClassExA(%WNDCLASSEXA* %wc) ; foreign
+declare %HWND @CreateWindowExA(i32 %ex_style, i8* %class_name, i8* %title, i32 %style, i32 %x, i32 %y, i32 %w, i32 %h, %HWND %parent, %HMENU %menu, %HINSTANCE %instance, %.rawptr %param) ; foreign
+declare %BOOL @ShowWindow(%HWND %hwnd, i32 %cmd_show) ; foreign
+declare %BOOL @UpdateWindow(%HWND %hwnd) ; foreign
+declare %BOOL @PeekMessageA(%MSG* %msg, %HWND %hwnd, i32 %msg_filter_min, i32 %msg_filter_max, i32 %remove_msg) ; foreign
+declare %BOOL @TranslateMessage(%MSG* %msg) ; foreign
+declare %LRESULT @DispatchMessageA(%MSG* %msg) ; foreign
+declare %LRESULT @DefWindowProcA(%HWND %hwnd, i32 %msg, %WPARAM %wparam, %LPARAM %lparam) ; foreign
+define i64 @GetQueryPerformanceFrequency() {
+entry.-.0:
+	%0 = alloca i64, align 8 ; r
+	store i64 zeroinitializer, i64* %0
+	%1 = getelementptr inbounds i64, i64* %0
+	%2 = call i32 @QueryPerformanceFrequency(i64* %1)
+	%3 = load i64, i64* %0, align 8
+	ret i64 %3
+}
+
+declare %HDC @GetDC(%HANDLE %h) ; foreign
+declare %BOOL @SetPixelFormat(%HDC %hdc, i32 %pixel_format, %PIXELFORMATDESCRIPTOR* %pfd) ; foreign
+declare i32 @ChoosePixelFormat(%HDC %hdc, %PIXELFORMATDESCRIPTOR* %pfd) ; foreign
+declare %HGLRC @wglCreateContext(%HDC %hdc) ; foreign
+declare %BOOL @wglMakeCurrent(%HDC %hdc, %HGLRC %hglrc) ; foreign
+declare %PROC @wglGetProcAddress(i8* %c_str) ; foreign
+declare %BOOL @wglDeleteContext(%HGLRC %hglrc) ; foreign
+declare %BOOL @SwapBuffers(%HDC %hdc) ; foreign
 declare i32 @putchar(i32 %c) ; foreign
 declare %.rawptr @malloc(i64 %sz) ; foreign
 declare void @free(%.rawptr %ptr) ; foreign
@@ -995,17 +1377,19 @@ entry.-.0:
 	ret i1 %5
 }
 
-@.str0 = global [8 x i8] c"Hellope\0A"
-@.str1 = global [6 x i8] c"break\0A"
-@.str2 = global [6 x i8] c"break\0A"
-@.str3 = global [13 x i8] c"Never\20called\0A"
-@.str4 = global [6 x i8] c"World\0A"
+@.str0 = global [14 x i8] c"GetLastError\3A\20"
+@.str1 = global [1 x i8] c"\0A"
+@.str2 = global [18 x i8] c"Odin-Language-Demo"
+@.str3 = global [18 x i8] c"Odin\20Language\20Demo"
+@.str4 = global [27 x i8] c"wglCreateContextAttribsARB\00"
 @.str5 = global [64 x i8] c"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\40$"
 @.str6 = global [64 x i8] c"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz\40$"
 @.str7 = global [4 x i8] c"true"
 @.str8 = global [5 x i8] c"false"
 define void @__$startup_runtime() noinline {
 entry.-.0:
+	%0 = call i64 @GetQueryPerformanceFrequency()
+	store i64 %0, i64* @win32_perf_count_freq
 	ret void
 }
 
diff --git a/examples/main.odin b/examples/main.odin
index fd1dca9ef..3747e8034 100644
--- a/examples/main.odin
+++ b/examples/main.odin
@@ -1,30 +1,4 @@
 #load "basic.odin"
-
-main :: proc() {
-	print_string("Hellope\n");
-	defer print_string("World\n");
-
-	for i := 0; i < 4; i++ {
-		defer {
-			print_int(i);
-			print_rune('\n');
-		}
-
-		if i > 2 {
-			defer print_string("break\n");
-			break;
-		}
-		if i == 2 {
-			// return;
-		}
-	}
-
-	print_string("Never called\n");
-}
-
-
-
-/*
 #load "win32.odin"
 
 win32_perf_count_freq := GetQueryPerformanceFrequency();
@@ -50,7 +24,6 @@ win32_print_last_error :: proc() {
 }
 
 main :: proc() {
-/*
 	wc: WNDCLASSEXA;
 	instance := GetModuleHandleA(null);
 
@@ -67,12 +40,13 @@ main :: proc() {
 
 	class_name := to_c_string("Odin-Language-Demo");
 	title := to_c_string("Odin Language Demo");
+	defer heap_free(class_name);
+	defer heap_free(title);
 
 	wc.cbSize = size_of(WNDCLASSEXA) as u32;
 	wc.style = CS_VREDRAW | CS_HREDRAW;
 	wc.hInstance = instance;
 	wc.className = class_name;
-	wc.hbrBackground = COLOR_BACKGROUND as HBRUSH;
 
 	wc.wndProc = proc(hwnd: HWND, msg: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT #no_inline {
 		if msg == WM_DESTROY || msg == WM_CLOSE || msg == WM_QUIT {
@@ -90,7 +64,7 @@ main :: proc() {
 	hwnd := CreateWindowExA(0,
 	                        class_name, title,
 	                        WS_VISIBLE | WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX,
-	                        0, 0, 854, 480,
+	                        CW_USEDEFAULT, CW_USEDEFAULT, 854, 480,
 	                        null, null, instance, null);
 
 
@@ -99,9 +73,45 @@ main :: proc() {
 		return;
 	}
 
+	dc := GetDC(hwnd);
+	opengl_context: HGLRC;
+
+	{
+		attribs : [8]i32;
+		pfd: PIXELFORMATDESCRIPTOR;
+		pfd.nSize = size_of(PIXELFORMATDESCRIPTOR) as u32;
+		pfd.nVersion     = 1;
+		pfd.dwFlags      = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
+		pfd.iPixelType   = PFD_TYPE_RGBA;
+		pfd.cColorBits   = 32;
+		pfd.cAlphaBits   = 8;
+		pfd.cDepthBits   = 24;
+		pfd.cStencilBits = 8;
+		pfd.iLayerType   = PFD_MAIN_PLANE;
+
+		SetPixelFormat(dc, ChoosePixelFormat(dc, ^pfd), null);
+		opengl_context = wglCreateContext(dc);
+		wglMakeCurrent(dc, opengl_context);
+
+		attribs[0] = 0x2091; // WGL_CONTEXT_MAJOR_VERSION_ARB
+		attribs[1] = 2; // Major
+		attribs[2] = 0x2092; // WGL_CONTEXT_MINOR_VERSION_ARB
+		attribs[3] = 1; // Minor
+
+		attribs[4] = 0x9126; // WGL_CONTEXT_PROFILE_MASK_ARB
+		attribs[5] = 0x0002; // WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB
+
+		attribs[6] = 0; // NOTE(bill): tells the proc that this is the end of attribs
+
+		wgl_string := "wglCreateContextAttribsARB\x00";
+		wglCreateContextAttribsARB := wglGetProcAddress(^wgl_string[0]) as wglCreateContextAttribsARBType;
+		rc := wglCreateContextAttribsARB(dc, 0, ^attribs[0]);
+		wglMakeCurrent(dc, rc);
+		SwapBuffers(dc);
+	}
+
 	start_time := time_now();
 	running := true;
-	tick_count := 0;
 	for running {
 		curr_time := time_now();
 		dt := curr_time - start_time;
@@ -124,13 +134,7 @@ main :: proc() {
 			}
 		}
 
-		print_string("Tick: ");
-		print_int(tick_count);
-		tick_count++;
-		print_rune('\n');
-
-		sleep_ms(16);
+		SwapBuffers(dc);
+		sleep_ms(2);
 	}
-*/
 }
-*/
diff --git a/examples/win32.odin b/examples/win32.odin
index c647d66dd..1b050a8f7 100644
--- a/examples/win32.odin
+++ b/examples/win32.odin
@@ -21,25 +21,25 @@ WM_QUIT    :: 0x12;
 
 PM_REMOVE :: 1;
 
-COLOR_BACKGROUND : rawptr : 1; // NOTE(bill): cast to HBRUSH when needed
+COLOR_BACKGROUND: rawptr : 1; // NOTE(bill): cast to HBRUSH when needed
 
 
-type HANDLE: rawptr;
-type HWND: HANDLE;
-type HDC: HANDLE;
-type HINSTANCE: HANDLE;
-type HICON: HANDLE;
-type HCURSOR: HANDLE;
-type HMENU: HANDLE;
-type HBRUSH: HANDLE;
-type WPARAM: uint;
-type LPARAM: int;
-type LRESULT: int;
-type ATOM: i16;
+type HANDLE: rawptr
+type HWND: HANDLE
+type HDC: HANDLE
+type HINSTANCE: HANDLE
+type HICON: HANDLE
+type HCURSOR: HANDLE
+type HMENU: HANDLE
+type HBRUSH: HANDLE
+type WPARAM: uint
+type LPARAM: int
+type LRESULT: int
+type ATOM: i16
 type POINT: struct { x, y: i32 }
-type BOOL: i32;
+type BOOL: i32
 
-type WNDPROC: proc(hwnd: HWND, msg: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT;
+type WNDPROC: proc(hwnd: HWND, msg: u32, wparam: WPARAM, lparam: LPARAM) -> LRESULT
 
 type WNDCLASSEXA: struct {
 	cbSize, style: u32,
@@ -89,7 +89,8 @@ RegisterClassExA :: proc(wc: ^WNDCLASSEXA) -> ATOM #foreign
 CreateWindowExA  :: proc(ex_style: u32,
                          class_name, title: ^u8,
                          style: u32,
-                         x, y, w, h: i32,
+                         x, y: u32,
+                         w, h: i32,
                          parent: HWND, menu: HMENU, instance: HINSTANCE,
                          param: rawptr) -> HWND #foreign
 
@@ -109,3 +110,76 @@ GetQueryPerformanceFrequency :: proc() -> i64 {
 	_ = QueryPerformanceFrequency(^r);
 	return r;
 }
+
+
+
+
+
+// Windows OpenGL
+
+PFD_TYPE_RGBA             :: 0;
+PFD_TYPE_COLORINDEX       :: 1;
+PFD_MAIN_PLANE            :: 0;
+PFD_OVERLAY_PLANE         :: 1;
+PFD_UNDERLAY_PLANE        :: -1;
+PFD_DOUBLEBUFFER          :: 1;
+PFD_STEREO                :: 2;
+PFD_DRAW_TO_WINDOW        :: 4;
+PFD_DRAW_TO_BITMAP        :: 8;
+PFD_SUPPORT_GDI           :: 16;
+PFD_SUPPORT_OPENGL        :: 32;
+PFD_GENERIC_FORMAT        :: 64;
+PFD_NEED_PALETTE          :: 128;
+PFD_NEED_SYSTEM_PALETTE   :: 0x00000100;
+PFD_SWAP_EXCHANGE         :: 0x00000200;
+PFD_SWAP_COPY             :: 0x00000400;
+PFD_SWAP_LAYER_BUFFERS    :: 0x00000800;
+PFD_GENERIC_ACCELERATED   :: 0x00001000;
+PFD_DEPTH_DONTCARE        :: 0x20000000;
+PFD_DOUBLEBUFFER_DONTCARE :: 0x40000000;
+PFD_STEREO_DONTCARE       :: 0x80000000;
+
+type HGLRC: HANDLE
+type PROC: proc()
+type wglCreateContextAttribsARBType: proc(hdc: HDC, hshareContext: rawptr, attribList: ^i32) -> HGLRC
+
+
+type PIXELFORMATDESCRIPTOR: struct  {
+	nSize,
+	nVersion,
+	dwFlags: u32,
+
+	iPixelType,
+	cColorBits,
+	cRedBits,
+	cRedShift,
+	cGreenBits,
+	cGreenShift,
+	cBlueBits,
+	cBlueShift,
+	cAlphaBits,
+	cAlphaShift,
+	cAccumBits,
+	cAccumRedBits,
+	cAccumGreenBits,
+	cAccumBlueBits,
+	cAccumAlphaBits,
+	cDepthBits,
+	cStencilBits,
+	cAuxBuffers,
+	iLayerType,
+	bReserved: byte,
+
+	dwLayerMask,
+	dwVisibleMask,
+	dwDamageMask: u32,
+}
+
+GetDC :: proc(h: HANDLE) -> HDC #foreign
+SetPixelFormat    :: proc(hdc: HDC, pixel_format: i32, pfd: ^PIXELFORMATDESCRIPTOR ) -> BOOL #foreign
+ChoosePixelFormat :: proc(hdc: HDC, pfd: ^PIXELFORMATDESCRIPTOR) -> i32 #foreign
+wglCreateContext  :: proc(hdc: HDC) -> HGLRC #foreign
+wglMakeCurrent    :: proc(hdc: HDC, hglrc: HGLRC) -> BOOL #foreign
+wglGetProcAddress :: proc(c_str: ^u8) -> PROC #foreign
+wglDeleteContext  :: proc(hglrc: HGLRC) -> BOOL #foreign
+SwapBuffers       :: proc(hdc: HDC) -> BOOL #foreign
diff --git a/misc/shell.bat b/misc/shell.bat
index 2253d0439..d23f1b9bf 100644
--- a/misc/shell.bat
+++ b/misc/shell.bat
@@ -5,6 +5,4 @@ rem call "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\vcvarsall.bat"
 set _NO_DEBUG_HEAP=1
 
 set path=w:\Odin\misc;%path%
-wmic
-
 cls
diff --git a/src/checker/checker.cpp b/src/checker/checker.cpp
index 225e94a95..1bc50a890 100644
--- a/src/checker/checker.cpp
+++ b/src/checker/checker.cpp
@@ -633,14 +633,6 @@ void check_parsed_files(Checker *c) {
 				add_file_entity(c, td->name, e, d);
 			case_end;
 
-			case_ast_node(ad, AliasDecl, decl);
-				ast_node(n, Ident, ad->name);
-				Entity *e = make_entity_alias_name(c->allocator, c->global_scope, n->token, NULL);
-				DeclInfo *d = make_declaration_info(c->allocator, e->parent);
-				d->type_expr = ad->type;
-				add_file_entity(c, ad->name, e, d);
-			case_end;
-
 			case_ast_node(pd, ProcDecl, decl);
 				ast_node(n, Ident, pd->name);
 				Token token = n->token;
diff --git a/src/checker/expr.cpp b/src/checker/expr.cpp
index f5b3d2158..542afb853 100644
--- a/src/checker/expr.cpp
+++ b/src/checker/expr.cpp
@@ -600,10 +600,10 @@ void check_is_expressible(Checker *c, Operand *o, Type *type) {
 			if (!is_type_integer(o->type) && is_type_integer(type)) {
 				error(&c->error_collector, ast_node_token(o->expr), "`%s` truncated to `%s`", a, b);
 			} else {
-				error(&c->error_collector, ast_node_token(o->expr), "`%s` overflows `%s`", a, b);
+				error(&c->error_collector, ast_node_token(o->expr), "`%s = %lld` overflows `%s`", a, o->value.value_integer, b);
 			}
 		} else {
-			error(&c->error_collector, ast_node_token(o->expr), "Cannot convert `%s` to `%s`", a, b);
+			error(&c->error_collector, ast_node_token(o->expr), "Cannot convert `%s`  to `%s`", a, b);
 		}
 
 		o->mode = Addressing_Invalid;
@@ -867,6 +867,11 @@ b32 check_castable_to(Checker *c, Operand *operand, Type *y) {
 		return true;
 	}
 
+	// proc <-> proc
+	if (is_type_proc(xb), is_type_proc(yb)) {
+		return true;
+	}
+
 	return false;
 }
 
diff --git a/src/checker/stmt.cpp b/src/checker/stmt.cpp
index 2fbe8e1d3..0ae500efc 100644
--- a/src/checker/stmt.cpp
+++ b/src/checker/stmt.cpp
@@ -878,12 +878,5 @@ void check_stmt(Checker *c, AstNode *node, u32 flags) {
 		add_entity(c, c->context.scope, td->name, e);
 		check_type_decl(c, e, td->type, NULL);
 	case_end;
-
-	case_ast_node(ad, AliasDecl, node);
-		ast_node(name, Ident, ad->name);
-		Entity *e = make_entity_alias_name(c->allocator, c->context.scope, name->token, NULL);
-		add_entity(c, c->context.scope, ad->name, e);
-		check_alias_decl(c, e, ad->type, NULL);
-	case_end;
 	}
 }
diff --git a/src/checker/type.cpp b/src/checker/type.cpp
index e0ce88c03..0931774e5 100644
--- a/src/checker/type.cpp
+++ b/src/checker/type.cpp
@@ -382,6 +382,9 @@ b32 is_type_u8_slice(Type *t) {
 b32 is_type_vector(Type *t) {
 	return t->kind == Type_Vector;
 }
+b32 is_type_proc(Type *t) {
+	return t->kind == Type_Proc;
+}
 Type *base_vector_type(Type *t) {
 	if (is_type_vector(t)) {
 		return t->vector.elem;
@@ -747,10 +750,12 @@ gbString write_type_to_string(gbString str, Type *type) {
 		if (type->tuple.variable_count > 0) {
 			for (isize i = 0; i < type->tuple.variable_count; i++) {
 				Entity *var = type->tuple.variables[i];
-				GB_ASSERT(var->kind == Entity_Variable);
-				if (i > 0)
-					str = gb_string_appendc(str, ", ");
-				str = write_type_to_string(str, var->type);
+				if (var != NULL) {
+					GB_ASSERT(var->kind == Entity_Variable);
+					if (i > 0)
+						str = gb_string_appendc(str, ", ");
+					str = write_type_to_string(str, var->type);
+				}
 			}
 		}
 		break;
diff --git a/src/codegen/print_llvm.cpp b/src/codegen/print_llvm.cpp
index 36b9156de..4c358f31b 100644
--- a/src/codegen/print_llvm.cpp
+++ b/src/codegen/print_llvm.cpp
@@ -210,7 +210,15 @@ void ssa_print_exact_value(gbFile *f, ssaModule *m, ExactValue value, Type *type
 		ssa_fprintf(f, "\"");
 	} break;
 	case ExactValue_Integer: {
-		ssa_fprintf(f, "%lld", value.value_integer);
+		if (is_type_pointer(get_base_type(type))) {
+			if (value.value_integer == 0) {
+				ssa_fprintf(f, "null");
+			} else {
+				GB_PANIC("TODO(bill): Pointer constant");
+			}
+		} else {
+			ssa_fprintf(f, "%lld", value.value_integer);
+		}
 	} break;
 	case ExactValue_Float: {
 		u64 u = *cast(u64*)&value.value_float;
diff --git a/src/codegen/ssa.cpp b/src/codegen/ssa.cpp
index 3e19e5932..f6497fc81 100644
--- a/src/codegen/ssa.cpp
+++ b/src/codegen/ssa.cpp
@@ -1355,6 +1355,11 @@ ssaValue *ssa_emit_conv(ssaProcedure *proc, ssaValue *value, Type *t) {
 		return ssa_emit(proc, ssa_make_instr_conv(proc, ssaConv_bitcast, value, src, dst));
 	}
 
+	// proc <-> proc
+	if (is_type_proc(src) && is_type_proc(dst)) {
+		return ssa_emit(proc, ssa_make_instr_conv(proc, ssaConv_bitcast, value, src, dst));
+	}
+
 
 	// []byte/[]u8 <-> string
 	if (is_type_u8_slice(src) && is_type_string(dst)) {
@@ -1743,7 +1748,7 @@ ssaValue *ssa_build_single_expr(ssaProcedure *proc, AstNode *expr, TypeAndValue
 
 		// NOTE(bill): Regular call
 		ssaValue *value = ssa_build_expr(proc, ce->proc);
-		Type *proc_type_ = ssa_value_type(value);
+		Type *proc_type_ = get_base_type(ssa_value_type(value));
 		GB_ASSERT(proc_type_->kind == Type_Proc);
 		auto *type = &proc_type_->proc;
 
diff --git a/src/main.cpp b/src/main.cpp
index f4240dec1..1eb4b92b8 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -76,7 +76,7 @@ int main(int argc, char **argv) {
 					output_name, cast(int)base_name_len, output_name);
 				win32_exec_command_line_app(
 					"clang %.*s.bc -o %.*s.exe -Wno-override-module "
-					"-lkernel32.lib -luser32.lib",
+					"-lkernel32.lib -luser32.lib -lgdi32.lib -lopengl32.lib",
 					cast(int)base_name_len, output_name,
 					cast(int)base_name_len, output_name);
 
diff --git a/src/parser.cpp b/src/parser.cpp
index cce4bc551..d6c450a88 100644
--- a/src/parser.cpp
+++ b/src/parser.cpp
@@ -177,7 +177,6 @@ AST_NODE_KIND(_DeclBegin,      struct{}) \
 			String  foreign_name;    \
 		}) \
 	AST_NODE_KIND(TypeDecl,   struct { Token token; AstNode *name, *type; }) \
-	AST_NODE_KIND(AliasDecl,  struct { Token token; AstNode *name, *type; }) \
 	AST_NODE_KIND(LoadDecl, struct { Token token, filepath; }) \
 AST_NODE_KIND(_DeclEnd, struct{}) \
 AST_NODE_KIND(_TypeBegin, struct{}) \
@@ -336,8 +335,6 @@ Token ast_node_token(AstNode *node) {
 		return node->ProcDecl.name->Ident.token;
 	case AstNode_TypeDecl:
 		return node->TypeDecl.token;
-	case AstNode_AliasDecl:
-		return node->AliasDecl.token;
 	case AstNode_LoadDecl:
 		return node->LoadDecl.token;
 	case AstNode_Field: {
@@ -759,15 +756,6 @@ gb_inline AstNode *make_type_decl(AstFile *f, Token token, AstNode *name, AstNod
 	return result;
 }
 
-gb_inline AstNode *make_alias_decl(AstFile *f, Token token, AstNode *name, AstNode *type) {
-	AstNode *result = make_node(f, AstNode_AliasDecl);
-	result->AliasDecl.token = token;
-	result->AliasDecl.name = name;
-	result->AliasDecl.type = type;
-	return result;
-}
-
-
 gb_inline AstNode *make_load_decl(AstFile *f, Token token, Token filepath) {
 	AstNode *result = make_node(f, AstNode_LoadDecl);
 	result->LoadDecl.token = token;
@@ -1948,31 +1936,7 @@ AstNode *parse_stmt(AstFile *f) {
 		AstNode *name = parse_identifier(f);
 		expect_token(f, Token_Colon);
 		AstNode *type = parse_type(f);
-
-		AstNode *type_decl = make_type_decl(f, token, name, type);
-
-		if (type->kind != AstNode_StructType &&
-		    type->kind != AstNode_ProcType) {
-			expect_token(f, Token_Semicolon);
-		}
-
-		return type_decl;
-	} break;
-
-	case Token_alias: {
-		Token   token = expect_token(f, Token_alias);
-		AstNode *name = parse_identifier(f);
-		expect_token(f, Token_Colon);
-		AstNode *type = parse_type(f);
-
-		AstNode *alias_decl = make_alias_decl(f, token, name, type);
-
-		if (type->kind != AstNode_StructType &&
-		    type->kind != AstNode_ProcType) {
-			expect_token(f, Token_Semicolon);
-		}
-
-		return alias_decl;
+		return make_type_decl(f, token, name, type);
 	} break;
 
 	// Operands
diff --git a/src/printer.cpp b/src/printer.cpp
index cbac29f94..f2e215fb3 100644
--- a/src/printer.cpp
+++ b/src/printer.cpp
@@ -152,14 +152,6 @@ void print_ast(AstNode *node, isize indent) {
 		print_ast(node->TypeDecl.type, indent+1);
 		break;
 
-	case AstNode_AliasDecl:
-		print_indent(indent);
-		gb_printf("(alias)\n");
-		print_ast(node->AliasDecl.name, indent+1);
-		print_ast(node->AliasDecl.type, indent+1);
-		break;
-
-
 	case AstNode_ProcType:
 		print_indent(indent);
 		gb_printf("(type:proc)(%td -> %td)\n", node->ProcType.param_count, node->ProcType.result_count);
diff --git a/src/tokenizer.cpp b/src/tokenizer.cpp
index 4c6db0a76..0a10cdce3 100644
--- a/src/tokenizer.cpp
+++ b/src/tokenizer.cpp
@@ -78,7 +78,6 @@ TOKEN_KIND(Token__OperatorEnd, "_OperatorEnd"), \
 \
 TOKEN_KIND(Token__KeywordBegin, "_KeywordBegin"), \
 	TOKEN_KIND(Token_type,        "type"), \
-	TOKEN_KIND(Token_alias,       "alias"), \
 	TOKEN_KIND(Token_proc,        "proc"), \
 	TOKEN_KIND(Token_match,       "match"), \
 	TOKEN_KIND(Token_break,       "break"), \