[clang] [compiler-rt] [clang][UBSan] Add implicit conversion check for bitfields (PR #75481)

[Axel Lundberg via cfe-commits]

================
@@ -1097,6 +1112,27 @@ void ScalarExprEmitter::EmitIntegerTruncationCheck(Value 
*Src, QualType SrcType,
                 {Src, Dst});
 }
 
+static llvm::Value *EmitIsNegativeTestHelper(Value *V, QualType VType,
+                                             const char *Name,
+                                             CGBuilderTy &Builder) {
+  // NOTE: zero value is considered to be non-negative.
----------------
Zonotora wrote:

Leftover comment from previous patches, will update.

https://github.com/llvm/llvm-project/pull/75481
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