C++: overlapping def/use must share IRVariable

2026-05-01 11:45:14 +02:00 · 2019-07-15 10:35:57 -07:00
parent 20e67eb37a
commit 86a018b0b4
1 changed files with 1 additions and 0 deletions
--- a/cpp/ql/src/semmle/code/cpp/ir/implementation/aliased_ssa/internal/AliasedSSA.qll
+++ b/cpp/ql/src/semmle/code/cpp/ir/implementation/aliased_ssa/internal/AliasedSSA.qll
@@ -263,6 +263,7 @@ predicate hasUnknownOffset(VariableMemoryLocation vml, VirtualVariable vv) {


 Overlap getVariableMemoryLocationOverlap(VariableMemoryLocation def, VariableMemoryLocation use) {
+  def.getVariable() = use.getVariable() and
  (
    exists(VirtualVariable vv, IntValue offset | isCoveredOffset(def, vv, offset) and isCoveredOffset(use, vv, offset))
    or