[clang] [HLSL] Implement the 'and' HLSL function (PR #127098)

[Farzon Lotfi via cfe-commits]

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@@ -2245,6 +2245,36 @@ bool SemaHLSL::CheckBuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) {
 
     break;
   }
+  case Builtin::BI__builtin_hlsl_and: {
+    if (SemaRef.checkArgCount(TheCall, 2))
+      return true;
+    if (CheckVectorElementCallArgs(&SemaRef, TheCall))
+      return true;
+
+    // CheckVectorElementCallArgs(...) guarantees both args are the same type.
+    assert(TheCall->getArg(0)->getType() == TheCall->getArg(1)->getType() &&
+           "Both args must be of the same type");
+
+    // check that the arguments are bools or, if vectors,
+    // vectors of bools
+    QualType ArgTy = TheCall->getArg(0)->getType();
+    if (const auto *VecTy = ArgTy->getAs<VectorType>()) {
+      ArgTy = VecTy->getElementType();
+    }
+    if (!getASTContext().hasSameUnqualifiedType(ArgTy,
----------------
farzonl wrote:

> This sounds like a recipe for throwing out a lot of errors and making it really hard for the user to process.

How is that any different than what we do right now with overload rules? For example `sin` doesn't have a double overload so we tell the user every candidate function.

https://godbolt.org/z/7qE5bxhK6


https://github.com/llvm/llvm-project/pull/127098