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[analyzer][NFC] Prove that we only track the evaluated part of the condition 

...because we're working with a BugReporterVisitor, and the non-evaluated part
of the condition isn't in the bugpath.

Differential Revision: https://reviews.llvm.org/D65290

llvm-svn: 368853
This commit is contained in:
Kristof Umann 2019-08-14 13:51:52 +00:00
parent 03eacbd489
commit 571c52af58
1 changed files with 35 additions and 0 deletions
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35
clang/test/Analysis/track-control-dependency-conditions.cpp
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@ -532,6 +532,7 @@ void f(int flag) {
}
#undef assert
} // end of namespace dont_track_assertlike_and_conditions
namespace dont_track_assertlike_or_conditions {
@ -697,3 +698,37 @@ void f(int flag) {
#undef assert
} // end of namespace dont_track_assert2like_or_conditions
namespace only_track_the_evaluated_condition {
bool coin();
void bar(int &flag) {
flag = coin(); // tracking-note{{Value assigned to 'flag'}}
}
void bar2(int &flag2) {
flag2 = coin();
}
void f(int *x) {
if (x) // expected-note{{Assuming 'x' is null}}
// debug-note@-1{{Tracking condition 'x'}}
// expected-note@-2{{Taking false branch}}
return;
int flag, flag2;
bar(flag); // tracking-note{{Calling 'bar'}}
// tracking-note@-1{{Returning from 'bar'}}
bar2(flag2);
if (flag && flag2) // expected-note {{Assuming 'flag' is 0}}
// expected-note@-1{{Left side of '&&' is false}}
// debug-note@-2{{Tracking condition 'flag'}}
return;
*x = 5; // expected-warning{{Dereference of null pointer}}
// expected-note@-1{{Dereference of null pointer}}
}
} // end of namespace only_track_the_evaluated_condition