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Remove parser m_uses in favor of {IR,AST}_FLAG_NOREF instead

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This commit is contained in:
Dale Weiler 2016-11-24 15:33:58 +00:00
parent def1a26b12
commit 3a7848d67c
5 changed files with 50 additions and 28 deletions
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28
ast.cpp
View file

@ -1132,6 +1132,8 @@ bool ast_value::generateGlobal(ir_builder *ir, bool isfield)
m_ir_v->m_flags |= IR_FLAG_INCLUDE_DEF;
if (m_flags & AST_FLAG_ERASEABLE)
m_ir_v->m_flags |= IR_FLAG_ERASABLE;
if (m_flags & AST_FLAG_NOREF)
m_ir_v->m_flags |= IR_FLAG_NOREF;
/* initialize */
if (m_hasvalue) {
@ -1236,6 +1238,8 @@ bool ast_value::generateGlobalField(ir_builder *ir)
m_ir_v->m_flags |= IR_FLAG_INCLUDE_DEF;
if (m_flags & AST_FLAG_ERASEABLE)
m_ir_v->m_flags |= IR_FLAG_ERASABLE;
if (m_flags & AST_FLAG_NOREF)
m_ir_v->m_flags |= IR_FLAG_NOREF;
const size_t namelen = m_name.length();
std::unique_ptr<char[]> name(new char[namelen+16]);
@ -1254,7 +1258,9 @@ bool ast_value::generateGlobalField(ir_builder *ir)
array->m_ir_values[ai]->m_unique_life = true;
array->m_ir_values[ai]->m_locked = true;
if (m_flags & AST_FLAG_INCLUDE_DEF)
m_ir_values[ai]->m_flags |= IR_FLAG_INCLUDE_DEF;
array->m_ir_values[ai]->m_flags |= IR_FLAG_INCLUDE_DEF;
if (m_flags & AST_FLAG_NOREF)
array->m_ir_values[ai]->m_flags |= IR_FLAG_NOREF;
}
}
else
@ -1266,9 +1272,10 @@ bool ast_value::generateGlobalField(ir_builder *ir)
m_ir_v = v;
if (m_flags & AST_FLAG_INCLUDE_DEF)
m_ir_v->m_flags |= IR_FLAG_INCLUDE_DEF;
if (m_flags & AST_FLAG_ERASEABLE)
m_ir_v->m_flags |= IR_FLAG_ERASABLE;
if (m_flags & AST_FLAG_NOREF)
m_ir_v->m_flags |= IR_FLAG_NOREF;
}
return true;
}
@ -1299,7 +1306,9 @@ ir_value *ast_value::prepareGlobalArray(ir_builder *ir)
if (m_flags & AST_FLAG_INCLUDE_DEF)
v->m_flags |= IR_FLAG_INCLUDE_DEF;
if (m_flags & AST_FLAG_ERASEABLE)
m_ir_v->m_flags |= IR_FLAG_ERASABLE;
v->m_flags |= IR_FLAG_ERASABLE;
if (m_flags & AST_FLAG_NOREF)
v->m_flags |= IR_FLAG_NOREF;
const size_t namelen = m_name.length();
std::unique_ptr<char[]> name(new char[namelen+16]);
@ -1319,6 +1328,8 @@ ir_value *ast_value::prepareGlobalArray(ir_builder *ir)
m_ir_values[ai]->m_locked = true;
if (m_flags & AST_FLAG_INCLUDE_DEF)
m_ir_values[ai]->m_flags |= IR_FLAG_INCLUDE_DEF;
if (m_flags & AST_FLAG_NOREF)
m_ir_values[ai]->m_flags |= IR_FLAG_NOREF;
}
return v;
@ -1365,6 +1376,9 @@ bool ast_value::generateLocal(ir_function *func, bool param)
v->m_unique_life = true;
v->m_locked = true;
if (m_flags & AST_FLAG_NOREF)
v->m_flags |= IR_FLAG_NOREF;
const size_t namelen = m_name.length();
std::unique_ptr<char[]> name(new char[namelen+16]);
util_strncpy(name.get(), m_name.c_str(), namelen);
@ -1379,7 +1393,10 @@ bool ast_value::generateLocal(ir_function *func, bool param)
}
m_ir_values[ai]->m_context = m_context;
m_ir_values[ai]->m_unique_life = true;
m_ir_values[ai]->m_locked = true;
m_ir_values[ai]->m_locked = true;
if (m_flags & AST_FLAG_NOREF)
m_ir_values[ai]->m_flags |= IR_FLAG_NOREF;
}
}
else
@ -1418,6 +1435,9 @@ bool ast_value::generateLocal(ir_function *func, bool param)
v->m_cvq = m_cvq;
m_ir_v = v;
if (m_flags & AST_FLAG_NOREF)
m_ir_v->m_flags |= IR_FLAG_NOREF;
if (!generateAccessors(func->m_owner))
return false;
return true;

9
ast.h
View file

@ -62,6 +62,12 @@ enum {
AST_FLAG_COVERAGE = 1 << 12,
AST_FLAG_BLOCK_COVERAGE = 1 << 13,
/*
* Propagates norefness to the IR so the unused (read/write) check can be
* more intelligently done.
*/
AST_FLAG_NOREF = 1 << 14,
AST_FLAG_LAST,
AST_FLAG_TYPE_MASK = (AST_FLAG_VARIADIC | AST_FLAG_NORETURN),
AST_FLAG_COVERAGE_MASK = (AST_FLAG_BLOCK_COVERAGE)
@ -223,9 +229,6 @@ struct ast_value : ast_expression
*/
std::vector<basic_value_t> m_initlist;
/* usecount for the parser */
size_t m_uses = 0;
ir_value *m_ir_v = nullptr;
std::vector<ir_value*> m_ir_values;
size_t m_ir_value_count = 0;

2
ir.cpp
View file

@ -633,7 +633,7 @@ bool ir_function_finalize(ir_function *self)
for (auto& lp : self->m_locals) {
ir_value *v = lp.get();
if (v->m_reads.empty() && v->m_writes.size()) {
if (v->m_reads.empty() && v->m_writes.size() && !(v->m_flags & IR_FLAG_NOREF)) {
// if it's a vector check to ensure all it's members are unused before
// claiming it's unused, otherwise skip the vector entierly
if (v->m_vtype == TYPE_VECTOR)

4
ir.h
View file

@ -27,8 +27,8 @@ enum {
IR_FLAG_INCLUDE_DEF = 1 << 3,
IR_FLAG_ERASABLE = 1 << 4,
IR_FLAG_BLOCK_COVERAGE = 1 << 5,
IR_FLAG_SPLIT_VECTOR = 1 << 6,
IR_FLAG_NOREF = 1 << 6,
IR_FLAG_SPLIT_VECTOR = 1 << 7,
IR_FLAG_LAST,
IR_FLAG_MASK_NO_OVERLAP = (IR_FLAG_HAS_ARRAYS | IR_FLAG_HAS_UNINITIALIZED),

35
parser.cpp
View file

@ -1668,13 +1668,16 @@ static bool parse_sya_operand(parser_t *parser, shunt *sy, bool with_labels)
}
else
{
if (ast_istype(var, ast_value)) {
((ast_value*)var)->m_uses++;
// promote these to norefs
if (ast_istype(var, ast_value))
{
((ast_value *)var)->m_flags |= AST_FLAG_NOREF;
}
else if (ast_istype(var, ast_member)) {
ast_member *mem = (ast_member*)var;
else if (ast_istype(var, ast_member))
{
ast_member *mem = (ast_member *)var;
if (ast_istype(mem->m_owner, ast_value))
((ast_value*)(mem->m_owner))->m_uses++;
((ast_value *)mem->m_owner)->m_flags |= AST_FLAG_NOREF;
}
}
sy->out.push_back(syexp(parser_ctx(parser), var));
@ -2020,15 +2023,8 @@ static bool parser_leaveblock(parser_t *parser)
locals = vec_last(parser->_blocklocals);
vec_pop(parser->_blocklocals);
while (vec_size(parser->_locals) != locals) {
ast_expression *e = vec_last(parser->_locals);
ast_value *v = (ast_value*)e;
while (vec_size(parser->_locals) != locals)
vec_pop(parser->_locals);
if (ast_istype(e, ast_value) && !v->m_uses) {
if (compile_warning(v->m_context, WARN_UNUSED_VARIABLE, "unused variable: `%s`", v->m_name))
rv = false;
}
}
typedefs = vec_last(parser->_blocktypedefs);
while (vec_size(parser->_typedefs) != typedefs) {
@ -5232,12 +5228,12 @@ static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofield
/* Deal with end_sys_ vars */
was_end = false;
if (var->m_name == "end_sys_globals") {
var->m_uses++;
var->m_flags |= AST_FLAG_NOREF;
parser->crc_globals = parser->globals.size();
was_end = true;
}
else if (var->m_name == "end_sys_fields") {
var->m_uses++;
var->m_flags |= AST_FLAG_NOREF;
parser->crc_fields = parser->fields.size();
was_end = true;
}
@ -5397,9 +5393,8 @@ static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofield
}
}
/* in a noref section we simply bump the usecount */
if (noref || parser->noref)
var->m_uses++;
var->m_flags |= AST_FLAG_NOREF;
/* Part 2:
* Create the global/local, and deal with vector types.
@ -5800,7 +5795,10 @@ skipvar:
var->m_cvq = CV_CONST;
}
if (cval == parser->nil)
{
var->m_flags |= AST_FLAG_INITIALIZED;
var->m_flags |= AST_FLAG_NOREF;
}
else
{
var->m_hasvalue = true;
@ -6075,6 +6073,7 @@ parser_t *parser_create()
parser->reserved_version->m_cvq = CV_CONST;
parser->reserved_version->m_hasvalue = true;
parser->reserved_version->m_flags |= AST_FLAG_INCLUDE_DEF;
parser->reserved_version->m_flags |= AST_FLAG_NOREF;
parser->reserved_version->m_constval.vstring = util_strdup(GMQCC_FULL_VERSION_STRING);
} else {
parser->reserved_version = nullptr;
@ -6272,7 +6271,7 @@ bool parser_finish(parser_t *parser, const char *output)
if (!ast_istype(it, ast_value))
continue;
asvalue = (ast_value*)it;
if (!asvalue->m_uses && asvalue->m_cvq != CV_CONST && asvalue->m_vtype != TYPE_FUNCTION) {
if (!(asvalue->m_flags & AST_FLAG_NOREF) && asvalue->m_cvq != CV_CONST && asvalue->m_vtype != TYPE_FUNCTION) {
retval = retval && !compile_warning(asvalue->m_context, WARN_UNUSED_VARIABLE,
"unused global: `%s`", asvalue->m_name);
}