Commit Graph

56 Commits

Author SHA1 Message Date
Ted Kremenek 39fa056342 Enhance -Wuninitialized-experimental diagnostics
to issue the warning at an uninitialized variable's
declaration, but to issue notes at possible
uninitialized uses (which could be multiple).

llvm-svn: 123994
2011-01-21 19:41:41 +00:00
Ted Kremenek b82ddd6ada Add rudimentary path-sensitivity to UnintializedValuesV2
analysis for short-circuited operations.  For branch written like "if (x && y)",
we maintain two sets of dataflow values for the outgoing
branches.  This suppresses some common false positives
for -Wuninitialized-experimental.

This change introduces some assertion failures
when running on the LLVM codebase.  WIP.

llvm-svn: 123923
2011-01-20 17:37:17 +00:00
Ted Kremenek b63931eef6 Teach UninitializedValuesV2 to implicitly reason about C++
references by monitoring whether an access to
a variable is solely to compute it's lvalue or
to do an lvalue-to-rvalue conversion (i.e., a load).

llvm-svn: 123777
2011-01-18 21:18:58 +00:00
Ted Kremenek c8d55da05a Correctly enable test/Sema/unit-variables.c,
thus identifying a minor logical flaw in
UninitializedValuesV2.cpp.

llvm-svn: 123734
2011-01-18 05:00:42 +00:00
Ted Kremenek cab479f0ee Teach UninitializedValuesV2 about "int x = x" and
also properly handle confluence of loops.

llvm-svn: 123733
2011-01-18 04:53:25 +00:00
Ted Kremenek b749a6d62a Add initial prototype for implementation of
-Wuninitialized based on CFG dataflow analysis.  WIP.

llvm-svn: 123512
2011-01-15 02:58:47 +00:00