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various optimizations (#3054)

This commit is contained in:
Oliver Stöneberg 2021-01-16 19:05:51 +01:00 committed by GitHub
parent 9f9a652ae1
commit b2ed372f75
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 27 additions and 27 deletions
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47
lib/astutils.cpp
View File

@ -551,11 +551,14 @@ bool extractForLoopValues(const Token *forToken,
static const Token * getVariableInitExpression(const Variable * var)
{
if (!var || !var->declEndToken())
if (!var)
return nullptr;
if (Token::Match(var->declEndToken(), "; %varid% =", var->declarationId()))
return var->declEndToken()->tokAt(2)->astOperand2();
return var->declEndToken()->astOperand2();
const Token *varDeclEndToken = var->declEndToken();
if (!varDeclEndToken)
return nullptr;
if (Token::Match(varDeclEndToken, "; %varid% =", var->declarationId()))
return varDeclEndToken->tokAt(2)->astOperand2();
return varDeclEndToken->astOperand2();
}
static bool isInLoopCondition(const Token * tok)
@ -729,13 +732,6 @@ static void followVariableExpressionError(const Token *tok1, const Token *tok2,
errors->push_back(item);
}
static void findTokenValue(const Token* const tok, std::function<bool(const ValueFlow::Value &)> pred, std::function<void(const ValueFlow::Value &)> f)
{
auto x = std::find_if(tok->values().begin(), tok->values().end(), pred);
if (x != tok->values().end())
f(*x);
}
static bool isSameLifetime(const Token * const tok1, const Token * const tok2)
{
ValueFlow::Value v1 = getLifetimeObjValue(tok1);
@ -747,18 +743,23 @@ static bool isSameLifetime(const Token * const tok1, const Token * const tok2)
static bool compareKnownValue(const Token * const tok1, const Token * const tok2, std::function<bool(const ValueFlow::Value&, const ValueFlow::Value&, bool)> compare)
{
bool result = false;
bool sameLifetime = isSameLifetime(tok1, tok2);
findTokenValue(tok1, std::mem_fn(&ValueFlow::Value::isKnown), [&](const ValueFlow::Value& v1) {
if (v1.isNonValue() || v1.isContainerSizeValue())
return;
findTokenValue(tok2, std::mem_fn(&ValueFlow::Value::isKnown), [&](const ValueFlow::Value& v2) {
if (v1.valueType == v2.valueType) {
result = compare(v1, v2, sameLifetime);
}
});
});
return result;
static const auto isKnownFn = std::mem_fn(&ValueFlow::Value::isKnown);
const auto v1 = std::find_if(tok1->values().begin(), tok1->values().end(), isKnownFn);
if (v1 == tok1->values().end()) {
return false;
}
if (v1->isNonValue() || v1->isContainerSizeValue())
return false;
const auto v2 = std::find_if(tok2->values().begin(), tok2->values().end(), isKnownFn);
if (v2 == tok2->values().end()) {
return false;
}
if (v1->valueType != v2->valueType) {
return false;
}
const bool sameLifetime = isSameLifetime(tok1, tok2);
return compare(*v1, *v2, sameLifetime);
}
bool isEqualKnownValue(const Token * const tok1, const Token * const tok2)

7
lib/programmemory.cpp
View File

@ -193,13 +193,13 @@ static void fillProgramMemoryFromConditions(ProgramMemory& pm, const Token* tok,
fillProgramMemoryFromConditions(pm, tok->scope(), tok, settings);
}
static void fillProgramMemoryFromAssignments(ProgramMemory& pm, const Token* tok, const ProgramMemory& state, ProgramMemory::Map vars)
static void fillProgramMemoryFromAssignments(ProgramMemory& pm, const Token* tok, const ProgramMemory& state, const ProgramMemory::Map& vars)
{
int indentlevel = 0;
for (const Token *tok2 = tok; tok2; tok2 = tok2->previous()) {
bool setvar = false;
if (Token::Match(tok2, "[;{}] %var% = %var% ;")) {
for (auto&& p:vars) {
for (const auto& p:vars) {
if (p.first != tok2->next()->varId())
continue;
const Token *vartok = tok2->tokAt(3);
@ -293,7 +293,6 @@ void ProgramMemoryState::addState(const Token* tok, const ProgramMemory::Map& va
{
ProgramMemory pm;
fillProgramMemoryFromConditions(pm, tok, nullptr);
ProgramMemory local;
for (const auto& p:vars) {
nonneg int varid = p.first;
const ValueFlow::Value &value = p.second;
@ -301,7 +300,7 @@ void ProgramMemoryState::addState(const Token* tok, const ProgramMemory::Map& va
if (value.varId)
pm.setIntValue(value.varId, value.varvalue);
}
local = pm;
ProgramMemory local = pm;
fillProgramMemoryFromAssignments(pm, tok, local, vars);
replace(pm, tok);
}