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Change behaviour for zero-sized value types of array-related types; Fix make behaviour to always zero memory

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This commit is contained in:
gingerBill
2020-04-12 10:41:44 +01:00
parent 5157619eb7
commit 9e698b720f
4 changed files with 60 additions and 115 deletions
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76
src/llvm_backend.cpp
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@@ -7952,6 +7952,7 @@ lbValue lb_emit_comp_against_nil(lbProcedure *p, TokenKind op_kind, lbValue x) {
}
return res;
} else if (is_type_any(t)) {
// TODO(bill): is this correct behaviour for nil comparison for any?
lbValue data = lb_emit_struct_ev(p, x, 0);
lbValue ti = lb_emit_struct_ev(p, x, 1);
if (op_kind == Token_CmpEq) {
@@ -7966,31 +7967,21 @@ lbValue lb_emit_comp_against_nil(lbProcedure *p, TokenKind op_kind, lbValue x) {
return res;
}
} else if (is_type_slice(t)) {
lbValue data = lb_emit_struct_ev(p, x, 0);
lbValue cap = lb_emit_struct_ev(p, x, 1);
lbValue len = lb_emit_struct_ev(p, x, 1);
if (op_kind == Token_CmpEq) {
LLVMValueRef a = LLVMBuildIsNull(p->builder, data.value, "");
LLVMValueRef b = LLVMBuildIsNull(p->builder, cap.value, "");
res.value = LLVMBuildOr(p->builder, a, b, "");
res.value = LLVMBuildIsNull(p->builder, len.value, "");
return res;
} else if (op_kind == Token_NotEq) {
LLVMValueRef a = LLVMBuildIsNotNull(p->builder, data.value, "");
LLVMValueRef b = LLVMBuildIsNotNull(p->builder, cap.value, "");
res.value = LLVMBuildAnd(p->builder, a, b, "");
res.value = LLVMBuildIsNotNull(p->builder, len.value, "");
return res;
}
} else if (is_type_dynamic_array(t)) {
lbValue data = lb_emit_struct_ev(p, x, 0);
lbValue cap = lb_emit_struct_ev(p, x, 2);
if (op_kind == Token_CmpEq) {
LLVMValueRef a = LLVMBuildIsNull(p->builder, data.value, "");
LLVMValueRef b = LLVMBuildIsNull(p->builder, cap.value, "");
res.value = LLVMBuildOr(p->builder, a, b, "");
res.value = LLVMBuildIsNull(p->builder, cap.value, "");
return res;
} else if (op_kind == Token_NotEq) {
LLVMValueRef a = LLVMBuildIsNotNull(p->builder, data.value, "");
LLVMValueRef b = LLVMBuildIsNotNull(p->builder, cap.value, "");
res.value = LLVMBuildAnd(p->builder, a, b, "");
res.value = LLVMBuildIsNotNull(p->builder, cap.value, "");
return res;
}
} else if (is_type_map(t)) {
@@ -8019,41 +8010,26 @@ lbValue lb_emit_comp_against_nil(lbProcedure *p, TokenKind op_kind, lbValue x) {
lbValue res = lb_emit_comp(p, op_kind, val, lb_const_int(p->module, t_int, 0));
return res;
} else if (is_type_soa_struct(t)) {
GB_PANIC("#soa struct nil comparison");
// Type *bt = base_type(t);
// if (bt->Struct.soa_kind == StructSoa_Slice) {
// lbValue len = lb_soa_struct_len(p, x);
// if (bt->Struct.fields.count > 1) {
// lbValue data = lb_emit_struct_ev(p, x, 0);
// if (op_kind == Token_CmpEq) {
// lbValue a = lb_emit_comp(p, Token_CmpEq, data, v_raw_nil);
// lbValue b = lb_emit_comp(p, Token_CmpEq, len, v_zero);
// return lb_emit_arith(p, Token_Or, a, b, t_bool);
// } else if (op_kind == Token_NotEq) {
// lbValue a = lb_emit_comp(p, Token_NotEq, data, v_raw_nil);
// lbValue b = lb_emit_comp(p, Token_NotEq, len, v_zero);
// return lb_emit_arith(p, Token_And, a, b, t_bool);
// }
// } else {
// return lb_emit_comp(p, op_kind, len, v_zero);
// }
// } else if (bt->Struct.soa_kind == StructSoa_Dynamic) {
// lbValue cap = lb_soa_struct_len(p, x);
// if (bt->Struct.fields.count > 1) {
// lbValue data = lb_emit_struct_ev(p, x, 0);
// if (op_kind == Token_CmpEq) {
// lbValue a = lb_emit_comp(p, Token_CmpEq, data, v_raw_nil);
// lbValue b = lb_emit_comp(p, Token_CmpEq, cap, v_zero);
// return lb_emit_arith(p, Token_Or, a, b, t_bool);
// } else if (op_kind == Token_NotEq) {
// lbValue a = lb_emit_comp(p, Token_NotEq, data, v_raw_nil);
// lbValue b = lb_emit_comp(p, Token_NotEq, cap, v_zero);
// return lb_emit_arith(p, Token_And, a, b, t_bool);
// }
// } else {
// return lb_emit_comp(p, op_kind, cap, v_zero);
// }
// }
Type *bt = base_type(t);
if (bt->Struct.soa_kind == StructSoa_Slice) {
lbValue len = lb_soa_struct_len(p, x);
if (op_kind == Token_CmpEq) {
res.value = LLVMBuildIsNull(p->builder, len.value, "");
return res;
} else if (op_kind == Token_NotEq) {
res.value = LLVMBuildIsNotNull(p->builder, len.value, "");
return res;
}
} else if (bt->Struct.soa_kind == StructSoa_Dynamic) {
lbValue cap = lb_soa_struct_cap(p, x);
if (op_kind == Token_CmpEq) {
res.value = LLVMBuildIsNull(p->builder, cap.value, "");
return res;
} else if (op_kind == Token_NotEq) {
res.value = LLVMBuildIsNotNull(p->builder, cap.value, "");
return res;
}
}
}
return {};
}