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add frame_address and return_address builtins

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This commit is contained in:
Andrew Kelley
2016-05-06 23:10:14 -07:00
parent 271a37b418
commit c098a8f522
4 changed files with 50 additions and 0 deletions
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27
src/codegen.cpp
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@@ -634,6 +634,13 @@ static LLVMValueRef gen_builtin_fn_call_expr(CodeGen *g, AstNode *node) {
case BuiltinFnIdBreakpoint:
set_debug_source_node(g, node);
return LLVMBuildCall(g->builder, g->trap_fn_val, nullptr, 0, "");
case BuiltinFnIdFrameAddress:
case BuiltinFnIdReturnAddress:
{
LLVMValueRef zero = LLVMConstNull(g->builtin_types.entry_i32->type_ref);
set_debug_source_node(g, node);
return LLVMBuildCall(g->builder, builtin_fn->fn_val, &zero, 1, "");
}
case BuiltinFnIdCmpExchange:
return gen_cmp_exchange(g, node);
case BuiltinFnIdFence:
@@ -4330,6 +4337,26 @@ static void define_builtin_fns(CodeGen *g) {
g->trap_fn_val = builtin_fn->fn_val;
}
{
BuiltinFnEntry *builtin_fn = create_builtin_fn_with_arg_count(g, BuiltinFnIdReturnAddress,
"return_address", 0);
builtin_fn->return_type = get_pointer_to_type(g, g->builtin_types.entry_u8, true);
LLVMTypeRef fn_type = LLVMFunctionType(builtin_fn->return_type->type_ref,
&g->builtin_types.entry_i32->type_ref, 1, false);
builtin_fn->fn_val = LLVMAddFunction(g->module, "llvm.returnaddress", fn_type);
assert(LLVMGetIntrinsicID(builtin_fn->fn_val));
}
{
BuiltinFnEntry *builtin_fn = create_builtin_fn_with_arg_count(g, BuiltinFnIdFrameAddress,
"frame_address", 0);
builtin_fn->return_type = get_pointer_to_type(g, g->builtin_types.entry_u8, true);
LLVMTypeRef fn_type = LLVMFunctionType(builtin_fn->return_type->type_ref,
&g->builtin_types.entry_i32->type_ref, 1, false);
builtin_fn->fn_val = LLVMAddFunction(g->module, "llvm.frameaddress", fn_type);
assert(LLVMGetIntrinsicID(builtin_fn->fn_val));
}
{
BuiltinFnEntry *builtin_fn = create_builtin_fn(g, BuiltinFnIdMemcpy, "memcpy");
builtin_fn->return_type = g->builtin_types.entry_void;