-Wuninitialized bugfix: when entering the scope of a variable with no
initializer, it is uninitialized, even if we may be coming from somewhere where
it was initialized.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@158611 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/UninitializedValues.cpp b/lib/Analysis/UninitializedValues.cpp
index 57dfab3..fbfa46c 100644
--- a/lib/Analysis/UninitializedValues.cpp
+++ b/lib/Analysis/UninitializedValues.cpp
@@ -625,6 +625,18 @@
// the use of the uninitialized value (which visiting the
// initializer).
vals[vd] = Initialized;
+ } else {
+ // No initializer: the variable is now uninitialized. This matters
+ // for cases like:
+ // while (...) {
+ // int n;
+ // use(n);
+ // n = 0;
+ // }
+ // FIXME: Mark the variable as uninitialized whenever its scope is
+ // left, since its scope could be re-entered by a jump over the
+ // declaration.
+ vals[vd] = Uninitialized;
}
}
}