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fix @bitCast semantics when there is no parent result loc

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This commit is contained in:
Andrew Kelley
2019-06-11 15:44:06 -04:00
parent 60c3861805
commit e1d14e73b5
4 changed files with 59 additions and 2 deletions
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41
src/ir.cpp
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@@ -792,6 +792,10 @@ static constexpr IrInstructionId ir_instruction_id(IrInstructionPtrCastGen *) {
return IrInstructionIdPtrCastGen;
}
static constexpr IrInstructionId ir_instruction_id(IrInstructionBitCastSrc *) {
return IrInstructionIdBitCastSrc;
}
static constexpr IrInstructionId ir_instruction_id(IrInstructionBitCastGen *) {
return IrInstructionIdBitCastGen;
}
@@ -2515,6 +2519,18 @@ static IrInstruction *ir_build_load_ptr_gen(IrAnalyze *ira, IrInstruction *sourc
return &instruction->base;
}
static IrInstruction *ir_build_bit_cast_src(IrBuilder *irb, Scope *scope, AstNode *source_node,
IrInstruction *operand, ResultLocBitCast *result_loc_bit_cast)
{
IrInstructionBitCastSrc *instruction = ir_build_instruction<IrInstructionBitCastSrc>(irb, scope, source_node);
instruction->operand = operand;
instruction->result_loc_bit_cast = result_loc_bit_cast;
ir_ref_instruction(operand, irb->current_basic_block);
return &instruction->base;
}
static IrInstruction *ir_build_bit_cast_gen(IrAnalyze *ira, IrInstruction *source_instruction,
IrInstruction *operand, ZigType *ty)
{
@@ -4941,7 +4957,8 @@ static IrInstruction *ir_gen_builtin_fn_call(IrBuilder *irb, Scope *scope, AstNo
if (arg1_value == irb->codegen->invalid_instruction)
return arg1_value;
return ir_lval_wrap(irb, scope, arg1_value, lval, result_loc);
IrInstruction *bitcast = ir_build_bit_cast_src(irb, scope, arg1_node, arg1_value, result_loc_bit_cast);
return ir_lval_wrap(irb, scope, bitcast, lval, result_loc);
}
case BuiltinFnIdIntToPtr:
{
@@ -14910,9 +14927,15 @@ static IrInstruction *ir_resolve_result(IrAnalyze *ira, IrInstruction *suspend_s
return ira->codegen->invalid_instruction;
}
IrInstruction *bitcasted_value;
if (value != nullptr) {
bitcasted_value = ir_analyze_bit_cast(ira, result_loc->source_instruction, value, dest_type);
} else {
bitcasted_value = nullptr;
}
IrInstruction *parent_result_loc = ir_resolve_result(ira, suspend_source_instr, result_bit_cast->parent,
dest_type, nullptr);
dest_type, bitcasted_value);
if (parent_result_loc == nullptr || type_is_invalid(parent_result_loc->value.type) ||
parent_result_loc->value.type->id == ZigTypeIdUnreachable)
{
@@ -24168,6 +24191,17 @@ static IrInstruction *ir_analyze_instruction_end_expr(IrAnalyze *ira, IrInstruct
return ir_const_void(ira, &instruction->base);
}
static IrInstruction *ir_analyze_instruction_bit_cast_src(IrAnalyze *ira, IrInstructionBitCastSrc *instruction) {
IrInstruction *operand = instruction->operand->child;
if (type_is_invalid(operand->value.type) || instr_is_comptime(operand) ||
instruction->result_loc_bit_cast->parent->gen_instruction == nullptr)
{
return operand;
}
return instruction->result_loc_bit_cast->parent->gen_instruction;
}
static IrInstruction *ir_analyze_instruction_base(IrAnalyze *ira, IrInstruction *instruction) {
switch (instruction->id) {
case IrInstructionIdInvalid:
@@ -24472,6 +24506,8 @@ static IrInstruction *ir_analyze_instruction_base(IrAnalyze *ira, IrInstruction
return nullptr;
case IrInstructionIdEndExpr:
return ir_analyze_instruction_end_expr(ira, (IrInstructionEndExpr *)instruction);
case IrInstructionIdBitCastSrc:
return ir_analyze_instruction_bit_cast_src(ira, (IrInstructionBitCastSrc *)instruction);
}
zig_unreachable();
}
@@ -24663,6 +24699,7 @@ bool ir_has_side_effects(IrInstruction *instruction) {
case IrInstructionIdTestComptime:
case IrInstructionIdPtrCastSrc:
case IrInstructionIdPtrCastGen:
case IrInstructionIdBitCastSrc:
case IrInstructionIdBitCastGen:
case IrInstructionIdWidenOrShorten:
case IrInstructionIdPtrToInt: