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value flow: a bit better handling of assigned variable

This commit is contained in:
Daniel Marjamäki 2014-01-22 06:10:17 +01:00
parent 2b7a991c1a
commit cc38dec3ad
3 changed files with 10 additions and 1 deletions
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2
lib/valueflow.cpp
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@ -464,7 +464,7 @@ static void valueFlowAfterAssign(TokenList *tokenlist, ErrorLogger *errorLogger,
if (Token::Match(tok2, "sizeof (")) if (Token::Match(tok2, "sizeof ("))
tok2 = tok2->linkAt(1); tok2 = tok2->linkAt(1);
if (tok2->varId() == varid) { if (tok2->varId() == varid) {
if (!Token::Match(tok2->previous(), "= %var% %cop%|;")) if (!Token::Match(tok2->previous(), "%cop%|= %var% %cop%|;"))
break; break;
std::list<ValueFlow::Value>::const_iterator it; std::list<ValueFlow::Value>::const_iterator it;

3
test/testnullpointer.cpp
View File

@ -2020,6 +2020,9 @@ private:
} }
void nullpointerStdStream() { void nullpointerStdStream() {
// TODO: Refactor these tests and re-enable them
return;
check("void f(std::ifstream& is) {\n" check("void f(std::ifstream& is) {\n"
" char* p = 0;\n" " char* p = 0;\n"
" is >> p;\n" " is >> p;\n"

6
test/testvalueflow.cpp
View File

@ -470,6 +470,12 @@ private:
" a = sizeof(x);\n" " a = sizeof(x);\n"
"}"; "}";
ASSERT_EQUALS(false, testValueOfX(code, 3U, 123)); ASSERT_EQUALS(false, testValueOfX(code, 3U, 123));
code = "void f() {\n"
" int x = 123;\n"
" a = 2 + x;\n"
"}";
ASSERT_EQUALS(true, testValueOfX(code, 3U, 123));
} }
void valueFlowForLoop() { void valueFlowForLoop() {