motiejus/zig
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add restrict qualifier on pointer arguments

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This commit is contained in:
Andrew Kelley
2016-01-08 20:59:47 -07:00
parent d14a31100f
commit 14b9cbd43c
10 changed files with 128 additions and 57 deletions
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32
src/codegen.cpp
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@@ -77,13 +77,13 @@ static TypeTableEntry *get_type_for_type_node(CodeGen *g, AstNode *type_node) {
return type_node->codegen_node->data.type_node.entry;
}
static LLVMTypeRef fn_proto_type_from_type_node(CodeGen *g, AstNode *type_node) {
static TypeTableEntry *fn_proto_type_from_type_node(CodeGen *g, AstNode *type_node) {
TypeTableEntry *type_entry = get_type_for_type_node(g, type_node);
if (type_entry->id == TypeTableEntryIdStruct || type_entry->id == TypeTableEntryIdArray) {
return get_pointer_to_type(g, type_entry, true)->type_ref;
return get_pointer_to_type(g, type_entry, true, true);
} else {
return type_entry->type_ref;
return type_entry;
}
}
@@ -1763,7 +1763,7 @@ static void do_code_gen(CodeGen *g) {
if (is_param_decl_type_void(g, param_node))
continue;
AstNode *type_node = param_node->data.param_decl.type;
param_types[gen_param_index] = fn_proto_type_from_type_node(g, type_node);
param_types[gen_param_index] = fn_proto_type_from_type_node(g, type_node)->type_ref;
gen_param_index += 1;
}
LLVMTypeRef function_type = LLVMFunctionType(ret_type, param_types, param_count, fn_proto->is_var_args);
@@ -1785,6 +1785,28 @@ static void do_code_gen(CodeGen *g) {
LLVMAddFunctionAttr(fn, LLVMNoUnwindAttribute);
}
// set parameter attributes
gen_param_index = 0;
for (int param_decl_i = 0; param_decl_i < fn_proto->params.length; param_decl_i += 1) {
AstNode *param_node = fn_proto->params.at(param_decl_i);
assert(param_node->type == NodeTypeParamDecl);
if (is_param_decl_type_void(g, param_node))
continue;
AstNode *type_node = param_node->data.param_decl.type;
TypeTableEntry *param_type = fn_proto_type_from_type_node(g, type_node);
LLVMValueRef argument_val = LLVMGetParam(fn, gen_param_index);
if (param_type->id == TypeTableEntryIdPointer &&
param_type->data.pointer.is_restrict)
{
LLVMAddAttribute(argument_val, LLVMNoAliasAttribute);
} else if (param_type->id == TypeTableEntryIdPointer &&
param_type->data.pointer.is_const)
{
LLVMAddAttribute(argument_val, LLVMReadOnlyAttribute);
}
gen_param_index += 1;
}
fn_table_entry->fn_value = fn;
}
@@ -2032,7 +2054,7 @@ static void define_builtin_types(CodeGen *g) {
LLVMZigEncoding_DW_ATE_unsigned());
g->builtin_types.entry_u64 = entry;
}
g->builtin_types.entry_c_string_literal = get_pointer_to_type(g, g->builtin_types.entry_u8, true);
g->builtin_types.entry_c_string_literal = get_pointer_to_type(g, g->builtin_types.entry_u8, true, false);
{
TypeTableEntry *entry = new_type_table_entry(TypeTableEntryIdInt);
entry->type_ref = LLVMInt8Type();