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Tokenizer: remove redundant assignments and variables

This commit is contained in:
Daniel Marjamäki 2010-01-31 09:52:19 +01:00
parent e15a16eb15
commit 1a59e1bc68
3 changed files with 27 additions and 24 deletions
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8
lib/tokenize.cpp
View File

@ -2796,7 +2796,9 @@ void Tokenizer::removeRedundantAssignment()
tok2 = tok2->tokAt(2);
localvars.insert(tok2->varId());
}
else if (tok2->varId() && !Token::Match(tok2->previous(), "[;{}] %var% = %var% ;"))
else if (tok2->varId() &&
!Token::Match(tok2->previous(), "[;{}] %var% = %var% ;") &&
!Token::Match(tok2->previous(), "[;{}] %var% = %num% ;"))
{
localvars.erase(tok2->varId());
}
@ -2814,7 +2816,7 @@ void Tokenizer::removeRedundantAssignment()
{
Token::eraseTokens(tok2, tok2->tokAt(4));
}
else if (Token::Match(tok2, "[;{}] %var% = %var% ;") && localvars.find(tok2->next()->varId()) != localvars.end())
else if (Token::Match(tok2, "[;{}] %var% = %any% ;") && localvars.find(tok2->next()->varId()) != localvars.end())
{
Token::eraseTokens(tok2, tok2->tokAt(4));
}
@ -4515,7 +4517,7 @@ bool Tokenizer::simplifyRedundantParanthesis()
ret = true;
}
if (Token::Match(tok->previous(), "[(!*;}] ( %var% )") && tok->next()->varId() != 0)
if (Token::Match(tok->previous(), "[(!*;{}] ( %var% )") && tok->next()->varId() != 0)
{
// We have "( var )", remove the paranthesis
tok->deleteThis();

40
test/testsimplifytokens.cpp
View File

@ -293,7 +293,7 @@ private:
{
const char code1[] = "void f() { int a; bool use = true; if( use ) a=0; else if( bb ) a=1; else if( cc ) a=33; else { gg = 0; } int c=1; }";
const char code2[] = "void f ( ) { int a ; ; ; { a = 0 ; } int c ; c = 1 ; }";
const char code2[] = "void f ( ) { ; ; ; { ; } ; ; }";
ASSERT_EQUALS(code2, tok(code1));
}
@ -485,7 +485,7 @@ private:
ASSERT_EQUALS("return p ;", tok("return (p);"));
ASSERT_EQUALS("void f ( ) { int * p ; if ( ! * p ) { } }", tok("void f(){int *p; if (*(p) == 0) {}}"));
ASSERT_EQUALS("void f ( ) { int * p ; if ( ! * p ) { } }", tok("void f(){int *p; if (*p == 0) {}}"));
ASSERT_EQUALS("void f ( ) { int p ; p = 1 ; }", tok("void f(){int p; (p) = 1;}"));
ASSERT_EQUALS("void f ( int & p ) { p = 1 ; }", tok("void f(int &p) {(p) = 1;}"));
ASSERT_EQUALS("void f ( ) { int p [ 10 ] ; p [ 0 ] = 1 ; }", tok("void f(){int p[10]; (p)[0] = 1;}"));
ASSERT_EQUALS("void f ( ) { int p ; if ( ! p ) { } }", tok("void f(){int p; if ((p) == 0) {}}"));
ASSERT_EQUALS("void f ( ) { int * p ; * p = 1 ; }", tok("void f(){int *p; *(p) = 1;}"));
@ -542,28 +542,28 @@ private:
void removePostIncrement()
{
const char code[] = "void f()\n"
const char code[] = "void f(int &c)\n"
"{\n"
" unsigned int c = 0;\n"
" c = 0;\n"
" c++;\n"
" if (c>0) { c++; }\n"
" c++;\n"
"}\n";
ASSERT_EQUALS("void f ( ) { int c ; c = 3 ; ; { ; } ; }", tok(code));
ASSERT_EQUALS("void f ( int & c ) { c = 3 ; ; { ; } ; }", tok(code));
}
void removePreIncrement()
{
{
const char code[] = "void f()\n"
const char code[] = "void f(int &c)\n"
"{\n"
" unsigned int c = 0;\n"
" c = 0;\n"
" ++c;\n"
" if (c>0) { ++c; }\n"
" ++c;\n"
"}\n";
ASSERT_EQUALS("void f ( ) { int c ; c = 3 ; ; { ; } ; }", tok(code));
ASSERT_EQUALS("void f ( int & c ) { c = 3 ; ; { ; } ; }", tok(code));
}
{
@ -752,22 +752,22 @@ private:
const char code[] = "void f()\n"
"{\n"
" char* ptrs[2];\n"
" int a = sizeof( ptrs );\n"
" a = sizeof( ptrs );\n"
"}\n";
std::ostringstream oss;
oss << (sizeofFromTokenizer("*") * 2);
ASSERT_EQUALS("void f ( ) { char * ptrs [ 2 ] ; int a ; a = " + oss.str() + " ; }", sizeof_(code));
ASSERT_EQUALS("void f ( ) { char * ptrs [ 2 ] ; a = " + oss.str() + " ; }", sizeof_(code));
}
{
const char code[] = "void f()\n"
"{\n"
" char* ptrs[55];\n"
" int a = sizeof( ptrs );\n"
" a = sizeof( ptrs );\n"
"}\n";
std::ostringstream oss;
oss << (sizeofFromTokenizer("*") * 55);
ASSERT_EQUALS("void f ( ) { char * ptrs [ 55 ] ; int a ; a = " + oss.str() + " ; }", sizeof_(code));
ASSERT_EQUALS("void f ( ) { char * ptrs [ 55 ] ; a = " + oss.str() + " ; }", sizeof_(code));
}
@ -775,11 +775,11 @@ private:
const char code[] = "void f()\n"
"{\n"
" char* ptrs;\n"
" int a = sizeof( ptrs );\n"
" a = sizeof( ptrs );\n"
"}\n";
std::ostringstream oss;
oss << sizeofFromTokenizer("*");
ASSERT_EQUALS("void f ( ) { ; int a ; a = " + oss.str() + " ; }", sizeof_(code));
ASSERT_EQUALS("void f ( ) { ; a = " + oss.str() + " ; }", sizeof_(code));
}
}
@ -1941,7 +1941,7 @@ private:
" bool x = false;\n"
" int b = x ? 44 : 3;\n"
"}\n";
ASSERT_EQUALS("void f ( ) { ; ; int b ; b = 3 ; }", tok(code));
ASSERT_EQUALS("void f ( ) { ; ; ; ; }", tok(code));
}
{
@ -3014,7 +3014,7 @@ private:
"}\n"
"}";
ASSERT_EQUALS("void f ( ) { int x ; x = 0 ; { g ( ) ; } }", tok(code));
ASSERT_EQUALS("void f ( ) { ; ; { g ( ) ; } }", tok(code));
}
{
@ -3027,7 +3027,7 @@ private:
"}\n"
"}";
ASSERT_EQUALS("void f ( ) { int x ; x = 1 ; }", tok(code));
ASSERT_EQUALS("void f ( ) { ; ; }", tok(code));
}
{
@ -3266,17 +3266,17 @@ private:
// ticket #1005 - int *p(0); => int *p = 0;
{
const char code[] = "void foo() { int *p(0); }";
ASSERT_EQUALS("void foo ( ) { int * p ; p = 0 ; }", tok(code));
ASSERT_EQUALS("void foo ( ) { ; ; }", tok(code));
}
{
const char code[] = "void foo() { int p(0); }";
ASSERT_EQUALS("void foo ( ) { int p ; p = 0 ; }", tok(code));
ASSERT_EQUALS("void foo ( ) { ; ; }", tok(code));
}
{
const char code[] = "void a() { foo *p(0); }";
ASSERT_EQUALS("void a ( ) { foo * p ; p = 0 ; }", tok(code));
ASSERT_EQUALS("void a ( ) { ; ; }", tok(code));
}
}
};

3
test/testtokenize.cpp
View File

@ -2269,7 +2269,7 @@ private:
std::ostringstream ostr;
for (const Token *tok = tokenizer.tokens(); tok; tok = tok->next())
ostr << " " << tok->str();
ASSERT_EQUALS(" void f ( ) { const int a = 45 ; { int b ; b = 45 ; } } void g ( ) { int a ; a = 2 ; }", ostr.str());
ASSERT_EQUALS(" void f ( ) { const int a = 45 ; { ; ; } } void g ( ) { ; ; }", ostr.str());
}
void simplify_constants2()
@ -2872,6 +2872,7 @@ private:
void removeRedundantAssignment()
{
ASSERT_EQUALS("void f ( ) { ; int * q ; ; }", tokenizeAndStringify("void f() { int *p, *q; p = q; }", true));
ASSERT_EQUALS("void f ( ) { ; ; int * q ; ; }", tokenizeAndStringify("void f() { int *p = 0, *q; p = q; }", true));
}
};