wip

generate.sh

@@ -1,7 +1,10 @@
 #!/usr/bin/env bash
 set -eu
-rm -rf build
-mkdir build
-cd build
-cmake .. -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_LINKER_TYPE=MOLD -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DCMAKE_PREFIX_PATH=/home/david/dev/llvm/install/llvm_20.1.3_x86_64-linux-Release -DCMAKE_COLOR_DIAGNOSTICS=ON
+CMAKE_BUILD_TYPE=Debug
+LLVM_CMAKE_BUILD_TYPE=Release
+BUILD_DIR=build
+rm -rf $BUILD_DIR
+mkdir $BUILD_DIR
+cd $BUILD_DIR
+cmake .. -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_LINKER_TYPE=MOLD -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DCMAKE_PREFIX_PATH=/home/david/dev/llvm/install/llvm_20.1.3_x86_64-linux-$LLVM_CMAKE_BUILD_TYPE -DCMAKE_COLOR_DIAGNOSTICS=ON
 cd ..

src/compiler.h

@@ -1,7 +1,7 @@
 #pragma once
 
 #include <lib.h>
-
+#include <llvm-c/Types.h>
 #define report_error() trap_raw()
 
 enum class Command
@@ -38,6 +38,23 @@ fn String build_mode_to_string(BuildMode build_mode)
     }
 }
 
+fn bool build_mode_is_optimized(BuildMode build_mode)
+{
+    switch (build_mode)
+    {
+        case BuildMode::debug_none:
+        case BuildMode::debug:
+            return false;
+        case BuildMode::soft_optimize:
+        case BuildMode::optimize_for_speed:
+        case BuildMode::optimize_for_size:
+        case BuildMode::aggressively_optimize_for_speed:
+        case BuildMode::aggressively_optimize_for_size:
+            return true;
+        case BuildMode::count: unreachable();
+    }
+}
+
 enum class ValueKind
 {
     right,
@@ -65,6 +82,165 @@ struct Argument;
 struct Scope;
 struct MacroDeclaration;
 
+struct DirectAttributes
+{
+    u32 offset;
+    u32 alignment;
+};
+
+struct IndirectAttributes
+{
+    u32 alignment;
+    u32 address_space;
+};
+
+enum class AbiKind : u8
+{
+    ignore,
+    direct,
+    extend,
+    indirect,
+    indirect_aliased,
+    expand,
+    coerce_and_expand,
+    in_alloca,
+};
+
+struct AbiFlags
+{
+    AbiKind kind;
+    bool padding_in_reg;
+    bool in_alloca_sret;
+    bool in_alloca_indirect;
+    bool indirect_by_value;
+    bool indirect_realign;
+    bool sret_after_this;
+    bool in_reg;
+    bool can_be_flattened;
+    bool sign_extension;
+};
+
+struct AbiInformation
+{
+    Type* semantic_type;
+    Type* coerce_to_type;
+    union
+    {
+        Type* type;
+        Type* unpadded_coerce_and_expand_type;
+    } padding;
+    u16 padding_argument_index;
+    union
+    {
+        DirectAttributes direct;
+        IndirectAttributes indirect;
+        u32 alloca_field_index;
+    } attributes;
+    AbiFlags flags;
+    u16 abi_start;
+    u16 abi_count;
+
+    inline void set_sret_after_this(bool sret_after_this)
+    {
+        assert(flags.kind == AbiKind::indirect);
+        flags.sret_after_this = sret_after_this;
+    }
+
+    inline void set_indirect_realign(bool realign)
+    {
+        assert(flags.kind == AbiKind::indirect);
+        flags.indirect_realign = realign;
+    }
+
+    inline void set_indirect_by_value(bool by_value)
+    {
+        assert(flags.kind == AbiKind::indirect);
+        flags.indirect_by_value = by_value;
+    }
+
+    inline void set_indirect_align(u32 alignment)
+    {
+        assert(flags.kind == AbiKind::indirect || flags.kind == AbiKind::indirect_aliased);
+        attributes.indirect.alignment = alignment;
+    }
+
+    inline bool can_have_coerce_to_type()
+    {
+        switch (flags.kind)
+        {
+            case AbiKind::direct:
+            case AbiKind::extend:
+            case AbiKind::coerce_and_expand:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    inline void set_coerce_to_type(Type* coerce_to_type)
+    {
+        assert(can_have_coerce_to_type());
+        this->coerce_to_type = coerce_to_type;
+    }
+
+    inline Type* get_coerce_to_type()
+    {
+        assert(can_have_coerce_to_type());
+        return coerce_to_type;
+    }
+
+    inline void set_padding_type(Type* padding_type)
+    {
+        assert(can_have_coerce_to_type());
+        padding = {
+            .type = padding_type,
+        };
+    }
+
+    inline bool can_have_padding_type()
+    {
+        switch (flags.kind)
+        {
+            case AbiKind::direct:
+            case AbiKind::extend:
+            case AbiKind::indirect:
+            case AbiKind::indirect_aliased:
+            case AbiKind::expand:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    inline Type* get_padding_type()
+    {
+        return can_have_padding_type() ? padding.type : 0;
+    }
+
+    inline void set_direct_offset(u32 offset)
+    {
+        assert(flags.kind == AbiKind::direct || flags.kind == AbiKind::extend);
+        attributes.direct.offset = offset;
+    }
+
+    inline void set_direct_alignment(u32 alignment)
+    {
+        assert(flags.kind == AbiKind::direct || flags.kind == AbiKind::extend);
+        attributes.direct.alignment = alignment;
+    }
+
+    inline void set_can_be_flattened(bool can_be_flattened)
+    {
+        assert(flags.kind == AbiKind::direct);
+        flags.can_be_flattened = can_be_flattened;
+    }
+
+    inline bool get_can_be_flattened()
+    {
+        return flags.can_be_flattened;
+    }
+};
+
 struct Target
 {
     CPUArchitecture cpu;
@@ -87,6 +263,24 @@ enum class CallingConvention
     count,
 };
 
+enum class ResolvedCallingConvention
+{
+    system_v,
+    win64,
+    count,
+};
+
+fn ResolvedCallingConvention resolve_calling_convention(CallingConvention cc)
+{
+    switch (cc)
+    {
+        case CallingConvention::c:
+            // TODO:
+            return ResolvedCallingConvention::system_v;
+        case CallingConvention::count: unreachable();
+    }
+}
+
 enum class InlineBehavior
 {
     normal,
@@ -124,12 +318,29 @@ struct TypeInteger
     bool is_signed;
 };
 
+struct AbiRegisterCountSystemV
+{
+    u32 gpr;
+    u32 sse;
+};
+
+union AbiRegisterCount
+{
+    AbiRegisterCountSystemV system_v;
+};
+
 struct TypeFunction
 {
     Type* semantic_return_type;
     Slice<Type*> semantic_argument_types;
     CallingConvention calling_convention;
     bool is_variable_arguments;
+    // ABI
+    Slice<Type*> abi_argument_types;
+    Type* abi_return_type;
+    AbiRegisterCount available_registers;
+    Slice<AbiInformation> argument_abis;
+    AbiInformation return_abi;
 };
 
 struct TypePointer
@@ -221,6 +432,13 @@ struct TypeUnion
     u32 biggest_field;
 };
 
+struct LLVMType
+{
+    LLVMTypeRef abi;
+    LLVMTypeRef memory;
+    LLVMMetadataRef debug;
+};
+
 struct Type
 {
     union
@@ -238,6 +456,7 @@ struct Type
     TypeId id;
     String name;
     Type* next;
+    LLVMType llvm;
 };
 
 fn u32 align_bit_count(u32 bit_count)
@@ -340,6 +559,7 @@ struct Scope
     u32 line;
     u32 column;
     ScopeKind kind;
+    LLVMMetadataRef llvm;
 };
 
 enum class StatementId
@@ -479,6 +699,7 @@ enum class ValueId
     zero,
     select,
     string_to_enum,
+    local,
 };
 
 struct ValueConstantInteger
@@ -487,12 +708,19 @@ struct ValueConstantInteger
     bool is_signed;
 };
 
+struct FunctionLLVM
+{
+    LLVMBasicBlockRef return_block;
+    LLVMValueRef return_alloca;
+};
+
 struct ValueFunction
 {
     Slice<Argument> arguments;
     Scope scope;
     Block* block;
     FunctionAttributes attributes;
+    FunctionLLVM llvm;
 };
 
 enum class UnaryId
@@ -694,6 +922,7 @@ struct Value
     Type* type;
     ValueId id;
     ValueKind kind;
+    LLVMValueRef llvm;
 
     bool is_constant()
     {
@@ -701,6 +930,8 @@ struct Value
         {
             case ValueId::constant_integer: 
                 return true;
+            case ValueId::unary:
+                return false;
             default: trap_raw();
         }
     }
@@ -742,6 +973,45 @@ struct Argument
     u32 index;
 };
 
+struct LLVMIntrinsicId
+{
+    u32 n;
+};
+
+enum class IntrinsicIndex
+{
+    trap,
+    va_start,
+    va_end,
+    va_copy,
+    count,
+};
+
+global_variable String intrinsic_names[] = {
+    string_literal("llvm.trap"),
+    string_literal("llvm.va_start"),
+    string_literal("llvm.va_end"),
+    string_literal("llvm.va_copy"),
+};
+
+static_assert(array_length(intrinsic_names) == (u64)IntrinsicIndex::count);
+
+struct ModuleLLVM
+{
+    LLVMContextRef context;
+    LLVMModuleRef module;
+    LLVMBuilderRef builder;
+    LLVMDIBuilderRef di_builder;
+    LLVMMetadataRef file;
+    LLVMMetadataRef compile_unit;
+    LLVMTypeRef pointer_type;
+    LLVMTypeRef void_type;
+    LLVMIntrinsicId intrinsic_table[(u64)IntrinsicIndex::count];
+    LLVMValueRef memcmp;
+    LLVMMetadataRef inlined_at;
+    u32 debug_tag;
+};
+
 struct Module
 {
     Arena* arena;
@@ -768,6 +1038,7 @@ struct Module
     MacroDeclaration* current_macro_declaration;
     MacroInstantiation* current_macro_instantiation;
 
+    ModuleLLVM llvm;
     Scope scope;
 
     String name;

src/lib.h

@@ -8,6 +8,7 @@
 #define breakpoint() __builtin_debugtrap()
 #define string_literal_length(s) (sizeof(s) - 1)
 #define string_literal(s) ((String){ .pointer = (u8*)(s), .length = string_literal_length(s), })
+#define split_string_literal(s) (char*)(s), string_literal_length(s)
 #define offsetof(S, f) __builtin_offsetof(S, f)
 
 #define array_length(arr) sizeof(arr) / sizeof((arr)[0])

src/llvm.h

@@ -1,24 +1,401 @@
-#include <lib.h>
+#pragma once
 
-namespace llvm
+#include <lib.h>
+#include <llvm-c/Core.h>
+#include <llvm-c/Analysis.h>
+#include <llvm-c/Target.h>
+#include <llvm-c/Analysis.h>
+#include <llvm-c/DebugInfo.h>
+
+
+enum class BBLLVMUWTableKind : u64
 {
-    class Type;
-    class Value;
-}
+    None = 0,  ///< No unwind table requested
+    Sync = 1,  ///< "Synchronous" unwind tables
+    Async = 2, ///< "Asynchronous" unwind tables (instr precise)
+    Default = 2,
+};
+
+enum class BBLLVMFramePointerKind : u64
+{
+    none = 0,
+    reserved = 1,
+    non_leaf = 2,
+    all = 3,
+};
+
+enum class ZeroCallUsedRegsKind : u64
+{
+    all = 0,
+    skip = 1 << 0,
+    only_used = 1 << 1,
+    only_gpr = 1 << 2,
+    only_arg = 1 << 3,
+    used_gpr_arg = only_used | only_gpr | only_arg,
+    used_gpr = only_used | only_gpr,
+    used_arg = only_used | only_arg,
+    used = only_used,
+    all_gpr_arg = only_gpr | only_arg,
+    all_gpr = only_gpr,
+    all_arg = only_arg,
+};
+
+struct BBLLVMFunctionAttributesFlags0
+{
+    u64 noreturn:1;
+    u64 cmse_ns_call:1;
+    u64 nounwind:1;
+    u64 returns_twice:1;
+    u64 cold:1;
+    u64 hot:1;
+    u64 no_duplicate:1;
+    u64 convergent:1;
+    u64 no_merge:1;
+    u64 will_return:1;
+    u64 no_caller_saved_registers:1;
+    u64 no_cf_check:1;
+    u64 no_callback:1;
+    u64 alloc_size:1;
+    u64 uniform_work_group_size:1;
+    u64 aarch64_pstate_sm_body:1;
+    u64 aarch64_pstate_sm_enabled:1;
+    u64 aarch64_pstate_sm_compatible:1;
+    u64 aarch64_preserves_za:1;
+    u64 aarch64_in_za:1;
+    u64 aarch64_out_za:1;
+    u64 aarch64_inout_za:1;
+    u64 aarch64_preserves_zt0:1;
+    u64 aarch64_in_zt0:1;
+    u64 aarch64_out_zt0:1;
+    u64 aarch64_inout_zt0:1;
+    u64 optimize_for_size:1;
+    u64 min_size:1;
+    u64 no_red_zone:1;
+    u64 indirect_tls_seg_refs:1;
+    u64 no_implicit_floats:1;
+    u64 sample_profile_suffix_elision_policy:1;
+    u64 memory_none:1;
+    u64 memory_readonly:1;
+    u64 memory_inaccessible_or_arg_memory_only:1;
+    u64 memory_arg_memory_only:1;
+    u64 strict_fp:1;
+    u64 no_inline:1;
+    u64 always_inline:1;
+    u64 guard_no_cf:1;
+
+    // TODO: branch protection function attributes
+    // TODO: cpu features
+
+    // Call-site begin
+    u64 call_no_builtins:1;
+
+    BBLLVMFramePointerKind definition_frame_pointer_kind:2;
+    u64 definition_less_precise_fpmad:1;
+    u64 definition_null_pointer_is_valid:1;
+    u64 definition_no_trapping_fp_math:1;
+    u64 definition_no_infs_fp_math:1;
+    u64 definition_no_nans_fp_math:1;
+    u64 definition_approx_func_fp_math:1;
+    u64 definition_unsafe_fp_math:1;
+    u64 definition_use_soft_float:1;
+    u64 definition_no_signed_zeroes_fp_math:1;
+    u64 definition_stack_realignment:1;
+    u64 definition_backchain:1;
+    u64 definition_split_stack:1;
+    u64 definition_speculative_load_hardening:1;
+    ZeroCallUsedRegsKind definition_zero_call_used_registers:4;
+    // TODO: denormal builtins
+    u64 definition_non_lazy_bind:1;
+    u64 definition_cmse_nonsecure_entry:1;
+    BBLLVMUWTableKind definition_unwind_table_kind:2;
+};
+
+static_assert(sizeof(BBLLVMFunctionAttributesFlags0) == sizeof(u64));
+
+struct BBLLVMFunctionAttributesFlags1
+{
+    u64 definition_disable_tail_calls:1;
+    u64 definition_stack_protect_strong:1;
+    u64 definition_stack_protect:1;
+    u64 definition_stack_protect_req:1;
+    u64 definition_aarch64_new_za:1;
+    u64 definition_aarch64_new_zt0:1;
+    u64 definition_optimize_none:1;
+    u64 definition_naked:1;
+    u64 definition_inline_hint:1;
+    u64 _:55;
+};
+
+static_assert(sizeof(BBLLVMFunctionAttributesFlags1) == sizeof(u64));
+
+struct BBLLVMFunctionAttributes
+{
+    String prefer_vector_width;
+    String stack_protector_buffer_size;
+    String definition_probe_stack;
+    String definition_stack_probe_size;
+
+    BBLLVMFunctionAttributesFlags0 flags0;
+    BBLLVMFunctionAttributesFlags1 flags1;
+};
+
+static_assert(sizeof(BBLLVMFunctionAttributes) == 10 * sizeof(u64));
+
+struct BBLLVMArgumentAttributes
+{
+    LLVMTypeRef semantic_type;
+    LLVMTypeRef abi_type;
+    u64 dereferenceable_bytes;
+    u32 alignment;
+    u32 no_alias:1;
+    u32 non_null:1;
+    u32 no_undef:1;
+    u32 sign_extend:1;
+    u32 zero_extend:1;
+    u32 in_reg:1;
+    u32 no_fp_class:10;
+    u32 struct_return:1;
+    u32 writable:1;
+    u32 dead_on_unwind:1;
+    u32 in_alloca:1;
+    u32 dereferenceable:1;
+    u32 dereferenceable_or_null:1;
+    u32 nest:1;
+    u32 by_value:1;
+    u32 by_reference:1;
+    u32 no_capture:1;
+    u32 _:6;
+};
+
+static_assert(sizeof(BBLLVMArgumentAttributes) == 2 * sizeof(LLVMTypeRef) + 2 * sizeof(u64));
+
+struct BBLLVMAttributeListOptions
+{
+    BBLLVMFunctionAttributes function;
+    BBLLVMArgumentAttributes return_;
+    BBLLVMArgumentAttributes* argument_pointer;
+    u64 argument_count;
+};
+
+static_assert(sizeof(BBLLVMAttributeListOptions) == sizeof(BBLLVMFunctionAttributes) + sizeof(BBLLVMArgumentAttributes) + sizeof(void*) + sizeof(u64));
+
+typedef void* BBLLVMAttributeList;
+
+enum class DwarfEmissionKind
+{
+    none,
+    full,
+    line_tables_only,
+};
+
+enum class DwarfType
+{
+    void_type = 0x0,
+    address = 0x1,
+    boolean = 0x2,
+    complex_float = 0x3,
+    float_type = 0x4,
+    signed_type = 0x5,
+    signed_char = 0x6,
+    unsigned_type = 0x7,
+    unsigned_char = 0x8,
+
+    // DWARF 3.
+    imaginary_float = 0x9,
+    packed_decimal = 0xa,
+    numeric_string = 0xb,
+    edited = 0xc,
+    signed_fixed = 0xd,
+    unsigned_fixed = 0xe,
+    decimal_float = 0xf,
+
+    // DWARF 4.
+    UTF = 0x10,
+
+    // DWARF 5.
+    UCS = 0x11,
+    ASCII = 0x12,
+
+    // HP extensions.
+    HP_float80 = 0x80, // Floating-point (80 bit).
+    HP_complex_float80 = 0x81, // Complex floating-point (80 bit).
+    HP_float128 = 0x82, // Floating-point (128 bit).
+    HP_complex_float128 = 0x83, // Complex fp (128 bit).
+    HP_floathpintel = 0x84, // Floating-point (82 bit IA64).
+    HP_imaginary_float80 = 0x85,
+    HP_imaginary_float128 = 0x86,
+    HP_VAX_float = 0x88, // F or G floating.
+    HP_VAX_float_d = 0x89, // D floating.
+    HP_packed_decimal = 0x8a, // Cobol.
+    HP_zoned_decimal = 0x8b, // Cobol.
+    HP_edited = 0x8c, // Cobol.
+    HP_signed_fixed = 0x8d, // Cobol.
+    HP_unsigned_fixed = 0x8e, // Cobol.
+    HP_VAX_complex_float = 0x8f, // F or G floating complex.
+    HP_VAX_complex_float_d = 0x90, // D floating complex.
+};
+
+enum class DIFlagsVisibility : u32
+{
+    none = 0,
+    private_ = 1,
+    protected_ = 2,
+    public_ = 3,
+};
+
+enum class DIFlagsInheritance : u32
+{
+    none = 0,
+    single_ = 1,
+    multiple_ = 2,
+    virtual_ = 3,
+};
+
+struct DIFlags
+{
+    DIFlagsVisibility visibility:2;
+    u32 forward_declaration:1;
+    u32 apple_block:1;
+    u32 block_by_ref_struct:1;
+    u32 virtual_:1;
+    u32 artificial:1;
+    u32 explicit_:1;
+    u32 prototyped:1;
+    u32 objective_c_class_complete:1;
+    u32 object_pointer:1;
+    u32 vector:1;
+    u32 static_member:1;
+    u32 lvalue_reference:1;
+    u32 rvalue_reference:1;
+    u32 reserved:1;
+    DIFlagsInheritance inheritance:2;
+    u32 introduced_virtual:1;
+    u32 bit_field:1;
+    u32 no_return:1;
+    u32 type_pass_by_value:1;
+    u32 type_pass_by_reference:1;
+    u32 enum_class:1;
+    u32 thunk:1;
+    u32 non_trivial:1;
+    u32 big_endian:1;
+    u32 little_endian:1;
+    u32 all_calls_described:1;
+    u32 _:3;
+};
+
+static_assert(sizeof(DIFlags) == sizeof(u32));
+
+enum class LinkageType : u32
+{
+    external,
+    available_externally,
+    link_once_any,
+    link_once_odr,
+    weak_any,
+    weak_odr,
+    appending,
+    internal,
+    private_,
+    external_weak,
+    common,
+};
+
+enum class LLVMCallingConvention : u32
+{
+    c = 0,
+    fast = 8,
+    cold = 9,
+    ghc = 10,
+    hipe = 11,
+    anyreg = 13,
+    preserve_most = 14,
+    preserve_all = 15,
+    swift = 16,
+    cxx_fast_tls = 17,
+    x86_stdcall = 64,
+    x86_fastcall = 65,
+    arm_apcs = 66,
+    arm_aapcs = 67,
+    arm_aapcsvfp = 68,
+    msp430_interrupt = 69,
+    x86_thiscall = 70,
+    ptx_kernel = 71,
+    ptx_device = 72,
+    spir_func = 75,
+    spir_kernel = 76,
+    intel_oclbi = 77,
+    x86_64_system_v = 78,
+    win64 = 79,
+    x86_vector = 80,
+    hhvm = 81,
+    hhvmc = 82,
+    x86_interrupt = 83,
+    avr_interrupt = 84,
+    avr_signal = 85,
+    avr_builtin = 86,
+    amdgpu_vs = 87,
+    amdgpu_gs = 88,
+    amdgpu_ps = 89,
+    amdgpu_cs = 90,
+    amdgpu_kernel = 91,
+    x86_regcall = 92,
+    amdgpu_hs = 93,
+    msp430_builtin = 94,
+    amgpu_ls = 95,
+    amdgpu_es = 96,
+};
 
 fn bool llvm_initialized = false;
 
-extern "C" void LLVMInitializeX86TargetInfo();
-extern "C" void LLVMInitializeX86Target();
-extern "C" void LLVMInitializeX86TargetMC();
-extern "C" void LLVMInitializeX86AsmPrinter();
-extern "C" void LLVMInitializeX86AsmParser();
-extern "C" void LLVMInitializeX86Disassembler();
+// extern "C" void LLVMInitializeX86TargetInfo();
+// extern "C" void LLVMInitializeX86Target();
+// extern "C" void LLVMInitializeX86TargetMC();
+// extern "C" void LLVMInitializeX86AsmPrinter();
+// extern "C" void LLVMInitializeX86AsmParser();
+// extern "C" void LLVMInitializeX86Disassembler();
 
 extern "C" String llvm_default_target_triple();
 extern "C" String llvm_host_cpu_name();
 extern "C" String llvm_host_cpu_features();
 
+// extern "C" llvm::LLVMContext* LLVMContextCreate();
+extern "C" LLVMModuleRef llvm_context_create_module(LLVMContextRef context, String name);
+// extern "C" LLVMB LLVMCreateBuilderInContext(llvm::LLVMContext* context);
+// extern "C" llvm::Type* LLVMVoidTypeInContext(llvm::LLVMContext* context);
+// extern "C" llvm::Type* LLVMIntTypeInContext(llvm::LLVMContext* context, u32 bit_count);
+// extern "C" llvm::Type* LLVMPointerTypeInContext(llvm::LLVMContext* context);
+// extern "C" llvm::FunctionType* LLVMFunctionType(llvm::Type* return_type, llvm::Type** parameter_type_pointer, u32 parameter_type_count, int is_var_args);
+// extern "C" LLVMIntrinsicId LLVMLookupIntrinsicID(const u8* name_pointer, u64 name_length);
+
+extern "C" LLVMValueRef llvm_module_create_function(LLVMModuleRef module, LLVMTypeRef function_type, LinkageType linkage_type, unsigned address_space, String name);
+// extern "C" void LLVMSetFunctionCallConv(llvm::Function* function, LLVMCallingConvention calling_convention);
+extern "C" void llvm_function_set_attributes(LLVMValueRef function, BBLLVMAttributeList attribute_list);
+
+extern "C" LLVMBasicBlockRef llvm_context_create_basic_block(LLVMContextRef context, String name, LLVMValueRef parent_function);
+// extern "C" void LLVMPositionBuilderAtEnd(llvm::Builder* builder, llvm::BasicBlock* basic_block);
+// extern "C" llvm::DILocation* LLVMGetCurrentDebugLocation2(llvm::Builder* builder);
+// extern "C" void LLVMSetCurrentDebugLocation2(llvm::Builder* builder, llvm::DILocation* location);
+
+extern "C" LLVMValueRef llvm_builder_create_alloca(LLVMBuilderRef builder, LLVMTypeRef type, unsigned address_space, u32 alignment, String name);
+extern "C" bool llvm_value_has_one_use(LLVMValueRef value);
+extern "C" LLVMValueRef llvm_basic_block_user_begin(LLVMBasicBlockRef basic_block);
+extern "C" void llvm_basic_block_delete(LLVMBasicBlockRef basic_block);
+
+extern "C" BBLLVMAttributeList llvm_attribute_list_build(LLVMContextRef context, BBLLVMAttributeListOptions* attributes, bool call_site);
+extern "C" LLVMValueRef llvm_find_return_value_dominating_store(LLVMBuilderRef b, LLVMValueRef ra, LLVMTypeRef et);
+extern "C" bool llvm_value_use_empty(LLVMValueRef value);
+extern "C" bool llvm_function_verify(LLVMValueRef function_value, String* error_message);
+extern "C" bool llvm_module_verify(LLVMModuleRef m, String* error_message);
+
+extern "C" String llvm_module_to_string(LLVMModuleRef module);
+
+// extern "C" llvm::DIBuilder* LLVMCreateDIBuilder(llvm::Module* module);
+// extern "C" llvm::DIFile* LLVMDIBuilderCreateFile(llvm::DIBuilder* builder, const u8* file_name_pointer, u64 file_name_length, const u8* directory_name_pointer, u64 directory_name_length);
+// extern "C" llvm::DICompileUnit* LLVMDIBuilderCreateCompileUnit(llvm::DIBuilder* builder, DwarfSourceLanguage dwarf_source_language, llvm::DIFile* file, const u8* producer_name_pointer, u64 producer_name_length, int is_optimized, const u8* flag_pointer, u64 flag_length, unsigned runtime_version, const u8* split_name_pointer, u64 split_name_length, DwarfEmissionKind emission_kind, unsigned debug_with_offset_id, int split_debug_inlining, int debug_info_for_profiling, const u8* sysroot_name_pointer, u64 sysroot_name_length, const u8* sdk_name_pointer, u64 sdk_name_length);
+// extern "C" llvm::DIType* LLVMDIBuilderCreateBasicType(llvm::DIBuilder* builder, const u8* name_pointer, u64 name_length, u64 bit_count, DwarfType dwarf_type, DIFlags flags);
+// extern "C" llvm::DISubroutineType* LLVMDIBuilderCreateSubroutineType(llvm::DIBuilder* builder, llvm::DIFile* file, llvm::DIType** parameter_type_pointer, u32 parameter_type_count, DIFlags flags);
+// extern "C" llvm::DISubprogram* LLVMDIBuilderCreateFunction(llvm::DIBuilder* builder, llvm::DIScope* scope, const u8* name_pointer, u64 name_length, const u8* linkage_name_pointer, u64 linkage_name_length, llvm::DIFile* File, unsigned line_number, llvm::DISubroutineType* subroutine_type, int is_local_to_unit, int is_definition, unsigned scope_line, DIFlags flags, int is_optimized);
+
 struct LLVMGlobal
 {
     String host_triple;
@@ -28,9 +405,10 @@ struct LLVMGlobal
 
 global_variable LLVMGlobal llvm_global;
 
-fn void initialize_all()
+fn void llvm_initialize_all_raw()
 {
     assert(!llvm_initialized);
+
     LLVMInitializeX86TargetInfo();
     LLVMInitializeX86Target();
     LLVMInitializeX86TargetMC();
@@ -44,3 +422,11 @@ fn void initialize_all()
         .host_cpu_features = llvm_host_cpu_features(),
     };
 }
+
+fn void llvm_initialize_all()
+{
+    if (!llvm_initialized)
+    {
+        llvm_initialize_all_raw();
+    }
+}

src/parser.cpp

@@ -2804,6 +2804,10 @@ fn Block* parse_block(Module* module, Scope* parent_scope)
         }
 
         auto* statement = parse_statement(module, scope);
+        if (!block->first_statement)
+        {
+            block->first_statement = statement;
+        }
 
         if (current_statement)
         {