- Allow making ElementRegions with complex offsets (expressions or symbols) for the purpose of bounds-checking.

- Rewrite GRState::AssumeInBound to actually do that checking, and to use the normal constraint path.
- Remove ConstraintManager::AssumeInBound.
- Teach RegionStore and FlatStore to ignore those regions for now.

llvm-svn: 111116

1 files changed, 16 insertions, 0 deletions

diff --git a/clang/test/Analysis/outofbound.c b/clang/test/Analysis/outofbound.c
index 529f0e77b26..ed51dc6ac06 100644
--- a/clang/test/Analysis/outofbound.c
+++ b/clang/test/Analysis/outofbound.c
@@ -79,3 +79,19 @@ void alloca_region(int a) {
     x[5] = 5; // expected-warning{{out-of-bound}}
   }
 }
+
+int symbolic_index(int a) {
+  int x[2] = {1, 2};
+  if (a == 2) {
+    return x[a]; // expected-warning{{out-of-bound}}
+  }
+  return 0;
+}
+
+int symbolic_index2(int a) {
+  int x[2] = {1, 2};
+  if (a < 0) {
+    return x[a]; // expected-warning{{out-of-bound}}
+  }
+  return 0;
+}