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IR: add ref instruction

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This commit is contained in:
Andrew Kelley
2016-11-27 01:22:30 -05:00
parent bd4d4ee51e
commit d9329ed389
4 changed files with 103 additions and 16 deletions
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37
src/codegen.cpp
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@@ -1661,6 +1661,16 @@ static LLVMValueRef ir_render_phi(CodeGen *g, IrExecutable *executable, IrInstru
return phi;
}
static LLVMValueRef ir_render_ref(CodeGen *g, IrExecutable *executable, IrInstructionRef *instruction) {
LLVMValueRef value = ir_llvm_value(g, instruction->value);
if (handle_is_ptr(instruction->value->type_entry)) {
return value;
} else {
LLVMBuildStore(g->builder, value, instruction->tmp_ptr);
return instruction->tmp_ptr;
}
}
static LLVMValueRef ir_render_instruction(CodeGen *g, IrExecutable *executable, IrInstruction *instruction) {
set_debug_source_node(g, instruction->source_node);
@@ -1724,6 +1734,8 @@ static LLVMValueRef ir_render_instruction(CodeGen *g, IrExecutable *executable,
return ir_render_switch_br(g, executable, (IrInstructionSwitchBr *)instruction);
case IrInstructionIdPhi:
return ir_render_phi(g, executable, (IrInstructionPhi *)instruction);
case IrInstructionIdRef:
return ir_render_ref(g, executable, (IrInstructionRef *)instruction);
case IrInstructionIdSwitchVar:
case IrInstructionIdContainerInitList:
case IrInstructionIdContainerInitFields:
@@ -2317,17 +2329,20 @@ static void do_code_gen(CodeGen *g) {
clear_debug_source_node(g);
// allocate structs which are the result of casts
for (size_t cea_i = 0; cea_i < fn_table_entry->cast_alloca_list.length; cea_i += 1) {
IrInstructionCast *cast_instruction = fn_table_entry->cast_alloca_list.at(cea_i);
cast_instruction->tmp_ptr = LLVMBuildAlloca(g->builder, cast_instruction->base.type_entry->type_ref, "");
}
// allocate structs which are struct value expressions
for (size_t alloca_i = 0; alloca_i < fn_table_entry->struct_val_expr_alloca_list.length; alloca_i += 1) {
StructValExprCodeGen *struct_val_expr_node = fn_table_entry->struct_val_expr_alloca_list.at(alloca_i);
struct_val_expr_node->ptr = LLVMBuildAlloca(g->builder,
struct_val_expr_node->type_entry->type_ref, "");
// allocate temporary stack data
for (size_t alloca_i = 0; alloca_i < fn_table_entry->alloca_list.length; alloca_i += 1) {
IrInstruction *instruction = fn_table_entry->alloca_list.at(alloca_i);
LLVMValueRef *slot;
if (instruction->id == IrInstructionIdCast) {
IrInstructionCast *cast_instruction = (IrInstructionCast *)instruction;
slot = &cast_instruction->tmp_ptr;
} else if (instruction->id == IrInstructionIdRef) {
IrInstructionRef *ref_instruction = (IrInstructionRef *)instruction;
slot = &ref_instruction->tmp_ptr;
} else {
zig_unreachable();
}
*slot = LLVMBuildAlloca(g->builder, instruction->type_entry->type_ref, "");
}
// create debug variable declarations for variables and allocate all local variables