do not set values if there is no expression

[firewave]

No description provided.

[firewave]

All tests still pass with the early returns added.

Example output:

TestLeakAutoVar::doublefree9
ExprIdToken - no tok
setValue - no expr - 0@1
setValue - no expr - 0@1
ExprIdToken - no tok
setValue - no expr - 1@2
setValue - no expr - 1@2
setValue - no expr - 1
setValue - no expr - 0

Looks like this is related to unnamed parameters.

@pfultz2 please have a look.

[firewave]

Happens with unnamed parameters when a function body exists:

void cb(int) {}

void func()
{
    cb(0);
}

ExprIdToken - no tok
setValue - no expr - 0@1
ExprIdToken - no tok
solveExprValue - no expr
setValue - no expr - 0@1
ExprIdToken - no tok
solveExprValue - no expr


##file scratch_3.cpp
1: void cb ( int ) { }
2:
3: void func ( )
4: {
5: cb (@exprUNIQUE 0 ) ;
6: }



##Value flow
File scratch_3.cpp
Line 5
  0 always 0

Naming the parameter fixes it:

##file scratch_3.cpp
1: void cb ( int i@var1 ) { }
2:
3: void func ( )
4: {
5: cb (@exprUNIQUE 0 ) ;
6: }



##Value flow
File scratch_3.cpp
Line 5
  0 always 0