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-rw-r--r--src/codegen.cpp159
1 files changed, 119 insertions, 40 deletions
diff --git a/src/codegen.cpp b/src/codegen.cpp
index be4661c57f..8e9ebe97a4 100644
--- a/src/codegen.cpp
+++ b/src/codegen.cpp
@@ -134,38 +134,6 @@ static TypeTableEntry *fn_proto_type_from_type_node(CodeGen *g, AstNode *type_no
}
}
-static LLVMValueRef gen_number_literal(CodeGen *g, AstNode *expr_node) {
- Expr *expr = get_resolved_expr(expr_node);
- TypeTableEntry *type_entry = expr->resolved_type;
- if (!type_entry) {
- type_entry = expr->type_entry;
- }
- assert(type_entry);
-
- ConstExprValue *const_val = &expr->const_val;
-
- assert(const_val->ok);
-
- if (type_entry->id == TypeTableEntryIdInt) {
- assert(const_val->data.x_bignum.kind == BigNumKindInt);
- return LLVMConstInt(type_entry->type_ref,
- bignum_to_twos_complement(&const_val->data.x_bignum),
- type_entry->data.integral.is_signed);
- } else if (type_entry->id == TypeTableEntryIdFloat) {
- if (const_val->data.x_bignum.kind == BigNumKindFloat) {
- return LLVMConstReal(type_entry->type_ref, const_val->data.x_bignum.data.x_float);
- } else {
- int64_t x = const_val->data.x_bignum.data.x_uint;
- if (const_val->data.x_bignum.is_negative) {
- x = -x;
- }
- return LLVMConstReal(type_entry->type_ref, x);
- }
- } else {
- zig_unreachable();
- }
-}
-
static LLVMValueRef gen_builtin_fn_call_expr(CodeGen *g, AstNode *node) {
assert(node->type == NodeTypeFnCallExpr);
AstNode *fn_ref_expr = node->data.fn_call_expr.fn_ref_expr;
@@ -277,7 +245,8 @@ static LLVMValueRef gen_builtin_fn_call_expr(CodeGen *g, AstNode *node) {
case BuiltinFnIdMinValue:
case BuiltinFnIdMaxValue:
case BuiltinFnIdMemberCount:
- return gen_number_literal(g, node);
+ // caught by constant expression eval codegen
+ zig_unreachable();
}
zig_unreachable();
}
@@ -1884,6 +1853,16 @@ static LLVMValueRef gen_var_decl_raw(CodeGen *g, AstNode *source_node, AstNodeVa
}
static LLVMValueRef gen_var_decl_expr(CodeGen *g, AstNode *node) {
+ AstNode *init_expr = node->data.variable_declaration.expr;
+ if (node->data.variable_declaration.is_const && init_expr) {
+ TypeTableEntry *init_expr_type = get_expr_type(init_expr);
+ if (init_expr_type->id == TypeTableEntryIdNumLitFloat ||
+ init_expr_type->id == TypeTableEntryIdNumLitInt)
+ {
+ return nullptr;
+ }
+ }
+
LLVMValueRef init_val;
return gen_var_decl_raw(g, node, &node->data.variable_declaration,
get_resolved_expr(node)->block_context, false, &init_val);
@@ -1992,6 +1971,11 @@ static LLVMValueRef gen_switch_expr(CodeGen *g, AstNode *node) {
}
static LLVMValueRef gen_expr_no_cast(CodeGen *g, AstNode *node) {
+ Expr *expr = get_resolved_expr(node);
+ if (expr->const_val.ok) {
+ assert(expr->const_llvm_val);
+ return expr->const_llvm_val;
+ }
switch (node->type) {
case NodeTypeBinOpExpr:
return gen_bin_op_expr(g, node);
@@ -2009,11 +1993,6 @@ static LLVMValueRef gen_expr_no_cast(CodeGen *g, AstNode *node) {
return gen_slice_expr(g, node);
case NodeTypeFieldAccessExpr:
return gen_field_access_expr(g, node, false);
- case NodeTypeBoolLiteral:
- if (node->data.bool_literal.value)
- return LLVMConstAllOnes(LLVMInt1Type());
- else
- return LLVMConstNull(LLVMInt1Type());
case NodeTypeNullLiteral:
return gen_null_literal(g, node);
case NodeTypeIfBoolExpr:
@@ -2026,8 +2005,6 @@ static LLVMValueRef gen_expr_no_cast(CodeGen *g, AstNode *node) {
return gen_for_expr(g, node);
case NodeTypeAsmExpr:
return gen_asm_expr(g, node);
- case NodeTypeNumberLiteral:
- return gen_number_literal(g, node);
case NodeTypeErrorLiteral:
return gen_error_literal(g, node);
case NodeTypeStringLiteral:
@@ -2070,6 +2047,10 @@ static LLVMValueRef gen_expr_no_cast(CodeGen *g, AstNode *node) {
return gen_container_init_expr(g, node);
case NodeTypeSwitchExpr:
return gen_switch_expr(g, node);
+ case NodeTypeNumberLiteral:
+ case NodeTypeBoolLiteral:
+ // caught by constant expression eval codegen
+ zig_unreachable();
case NodeTypeRoot:
case NodeTypeRootExportDecl:
case NodeTypeFnProto:
@@ -2129,16 +2110,114 @@ static void build_label_blocks(CodeGen *g, AstNode *block_node) {
label_node->data.label.label_entry->basic_block = LLVMAppendBasicBlock(
g->cur_fn->fn_value, buf_ptr(name));
}
+}
+static LLVMValueRef gen_const_val(CodeGen *g, TypeTableEntry *type_entry, ConstExprValue *const_val) {
+ assert(const_val->ok);
+
+ if (type_entry->id == TypeTableEntryIdInt) {
+ return LLVMConstInt(type_entry->type_ref, bignum_to_twos_complement(&const_val->data.x_bignum), false);
+ } else if (type_entry->id == TypeTableEntryIdFloat) {
+ if (const_val->data.x_bignum.kind == BigNumKindFloat) {
+ return LLVMConstReal(type_entry->type_ref, const_val->data.x_bignum.data.x_float);
+ } else {
+ int64_t x = const_val->data.x_bignum.data.x_uint;
+ if (const_val->data.x_bignum.is_negative) {
+ x = -x;
+ }
+ return LLVMConstReal(type_entry->type_ref, x);
+ }
+ } else if (type_entry->id == TypeTableEntryIdBool) {
+ if (const_val->data.x_bool) {
+ return LLVMConstAllOnes(LLVMInt1Type());
+ } else {
+ return LLVMConstNull(LLVMInt1Type());
+ }
+ } else if (type_entry->id == TypeTableEntryIdMaybe) {
+ TypeTableEntry *child_type = type_entry->data.maybe.child_type;
+ LLVMValueRef child_val;
+ LLVMValueRef maybe_val;
+ if (const_val->data.x_maybe) {
+ child_val = gen_const_val(g, child_type, const_val->data.x_maybe);
+ maybe_val = LLVMConstAllOnes(LLVMInt1Type());
+ } else {
+ child_val = LLVMConstNull(child_type->type_ref);
+ maybe_val = LLVMConstNull(LLVMInt1Type());
+ }
+ LLVMValueRef fields[] = {
+ child_val,
+ maybe_val,
+ };
+ return LLVMConstStruct(fields, 2, false);
+ } else if (type_entry->id == TypeTableEntryIdStruct) {
+ zig_panic("TODO");
+ } else if (type_entry->id == TypeTableEntryIdArray) {
+ zig_panic("TODO");
+ } else if (type_entry->id == TypeTableEntryIdEnum) {
+ LLVMTypeRef tag_type_ref = type_entry->data.enumeration.tag_type->type_ref;
+ LLVMValueRef tag_value = LLVMConstInt(tag_type_ref, const_val->data.x_enum.tag, false);
+ if (type_entry->data.enumeration.gen_field_count == 0) {
+ return tag_value;
+ } else {
+ zig_panic("TODO");
+ /*
+ LLVMValueRef fields[] = {
+ tag_value,
+ union_value,
+ };
+ return LLVMConstStruct(fields, 2, false);
+ */
+ }
+ } else if (type_entry->id == TypeTableEntryIdFn) {
+ return const_val->data.x_fn->fn_value;
+ } else {
+ zig_unreachable();
+ }
+}
+
+static void gen_const_globals(CodeGen *g) {
+ for (int i = 0; i < g->global_const_list.length; i += 1) {
+ Expr *expr = g->global_const_list.at(i);
+ ConstExprValue *const_val = &expr->const_val;
+ assert(const_val->ok);
+ TypeTableEntry *type_entry = expr->resolved_type;
+
+ // TODO delete this if when we make implicit casts insert ast nodes
+ if (type_entry->id == TypeTableEntryIdNumLitFloat ||
+ type_entry->id == TypeTableEntryIdNumLitInt)
+ {
+ continue;
+ }
+
+ if (handle_is_ptr(type_entry)) {
+ LLVMValueRef global_value = LLVMAddGlobal(g->module, type_entry->type_ref, "");
+ LLVMSetLinkage(global_value, LLVMPrivateLinkage);
+ LLVMValueRef init_val = gen_const_val(g, type_entry, const_val);
+ LLVMSetInitializer(global_value, init_val);
+ LLVMSetGlobalConstant(global_value, true);
+ LLVMSetUnnamedAddr(global_value, true);
+ expr->const_llvm_val = global_value;
+ } else {
+ expr->const_llvm_val = gen_const_val(g, type_entry, const_val);
+ }
+ }
}
static void do_code_gen(CodeGen *g) {
assert(!g->errors.length);
+ gen_const_globals(g);
+
// Generate module level variables
for (int i = 0; i < g->global_vars.length; i += 1) {
VariableTableEntry *var = g->global_vars.at(i);
+ if (var->type->id == TypeTableEntryIdNumLitFloat ||
+ var->type->id == TypeTableEntryIdNumLitInt)
+ {
+ continue;
+ }
+
// TODO if the global is exported, set external linkage
LLVMValueRef global_value = LLVMAddGlobal(g->module, var->type->type_ref, "");
LLVMSetLinkage(global_value, LLVMPrivateLinkage);
generated by cgit v1.2.3 (git 2.39.1) at 2025-12-29 09:27:13 +0000