[clang] [compiler-rt] [llvm] [TySan] Let TypeSanitizer know about conservative path TBAA data (PR #227782)

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Wed Sep 30 09:49:24 PDT 2026


github-actions[bot] wrote:

<!--LLVM CODE FORMAT COMMENT: {clang-format}-->


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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- compiler-rt/test/tysan/no-false-positive-issue208646.cpp compiler-rt/test/tysan/no-false-positive-issue208647.cpp compiler-rt/test/tysan/no-false-positive-issue208655.cpp compiler-rt/test/tysan/no-false-positive-issue210643.cpp clang/lib/CodeGen/CodeGenTBAA.cpp compiler-rt/lib/tysan/tysan.cpp llvm/lib/Transforms/Instrumentation/TypeSanitizer.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/clang/lib/CodeGen/CodeGenTBAA.cpp b/clang/lib/CodeGen/CodeGenTBAA.cpp
index acdf6abc5..166ef2493 100644
--- a/clang/lib/CodeGen/CodeGenTBAA.cpp
+++ b/clang/lib/CodeGen/CodeGenTBAA.cpp
@@ -367,7 +367,7 @@ llvm::MDNode *CodeGenTBAA::getTypeInfoHelper(const Type *Ty) {
   }
 
   // For now, handle any other kind of type conservatively.
-  if(Features.Sanitize.has(SanitizerKind::Type)){
+  if (Features.Sanitize.has(SanitizerKind::Type)) {
     return createScalarTypeNode("TysanConservativeTBAA", getChar(), 1);
   }
   return getChar();
diff --git a/compiler-rt/test/tysan/no-false-positive-issue208646.cpp b/compiler-rt/test/tysan/no-false-positive-issue208646.cpp
index 236b4a86d..fc8a2da6e 100644
--- a/compiler-rt/test/tysan/no-false-positive-issue208646.cpp
+++ b/compiler-rt/test/tysan/no-false-positive-issue208646.cpp
@@ -1,11 +1,11 @@
 // RUN: %clangxx_tysan -O0 %s -o %t && %run %t
 
-#include <string>
 #include <optional>
+#include <string>
 
 static std::optional<std::string> optional_var = std::nullopt;
 
-int main() { 
+int main() {
   optional_var = "this is a random long string (short one does not reproduce)";
   return 0;
 }
diff --git a/compiler-rt/test/tysan/no-false-positive-issue208655.cpp b/compiler-rt/test/tysan/no-false-positive-issue208655.cpp
index 7518b2445..cba71c5b5 100644
--- a/compiler-rt/test/tysan/no-false-positive-issue208655.cpp
+++ b/compiler-rt/test/tysan/no-false-positive-issue208655.cpp
@@ -3,13 +3,13 @@
 #include <vector>
 
 struct Registry {
-    std::vector<int> arr;
-    char temp_byte;
-    bool bool_var = false;
+  std::vector<int> arr;
+  char temp_byte;
+  bool bool_var = false;
 };
 
 int main() {
-    static Registry r;
-    r.arr.push_back(0);
-    r.bool_var = true;
+  static Registry r;
+  r.arr.push_back(0);
+  r.bool_var = true;
 }
diff --git a/compiler-rt/test/tysan/no-false-positive-issue210643.cpp b/compiler-rt/test/tysan/no-false-positive-issue210643.cpp
index d667f7564..4a74abd43 100644
--- a/compiler-rt/test/tysan/no-false-positive-issue210643.cpp
+++ b/compiler-rt/test/tysan/no-false-positive-issue210643.cpp
@@ -1,11 +1,9 @@
 // RUN: %clangxx_tysan -O0 %s -o %t && %run %t
 
 struct A {
-    int elems[3];
+  int elems[3];
 };
 
 A a;
 
-int main() {
-    a.elems[0] = 1;
-}
+int main() { a.elems[0] = 1; }

``````````

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https://github.com/llvm/llvm-project/pull/227782


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