[HLSL] Update __builtin_hlsl_dot builtin Sema Checking to fix error when passed an array literal 1u.xxxx (#133941)

update dot builtin sema checking and codegen
new test 
fix tests
Closes #133659

Author: spall

clang/lib/CodeGen/CGHLSLBuiltins.cpp

@@ -368,20 +368,12 @@ Value *CodeGenFunction::EmitHLSLBuiltinExpr(unsigned BuiltinID,
           "Scalar dot product is only supported on ints and floats.");
     }
     // For vectors, validate types and emit the appropriate intrinsic
-
-    // A VectorSplat should have happened
-    assert(T0->isVectorTy() && T1->isVectorTy() &&
-           "Dot product of vector and scalar is not supported.");
+    assert(CGM.getContext().hasSameUnqualifiedType(E->getArg(0)->getType(),
+                                                   E->getArg(1)->getType()) &&
+           "Dot product operands must have the same type.");
 
     auto *VecTy0 = E->getArg(0)->getType()->castAs<VectorType>();
-    [[maybe_unused]] auto *VecTy1 =
-        E->getArg(1)->getType()->castAs<VectorType>();
-
-    assert(VecTy0->getElementType() == VecTy1->getElementType() &&
-           "Dot product of vectors need the same element types.");
-
-    assert(VecTy0->getNumElements() == VecTy1->getNumElements() &&
-           "Dot product requires vectors to be of the same size.");
+    assert(VecTy0 && "Dot product argument must be a vector.");
 
     return Builder.CreateIntrinsic(
         /*ReturnType=*/T0->getScalarType(),

clang/lib/Sema/SemaHLSL.cpp

@@ -2015,7 +2015,8 @@ static bool CheckVectorElementCallArgs(Sema *S, CallExpr *TheCall) {
     }
     if (VecTyA && VecTyB) {
       bool retValue = false;
-      if (VecTyA->getElementType() != VecTyB->getElementType()) {
+      if (!S->Context.hasSameUnqualifiedType(VecTyA->getElementType(),
+                                             VecTyB->getElementType())) {
         // Note: type promotion is intended to be handeled via the intrinsics
         //  and not the builtin itself.
         S->Diag(TheCall->getBeginLoc(),

clang/test/CodeGenHLSL/builtins/dot.hlsl

@@ -158,3 +158,11 @@ float test_dot_float4(float4 p0, float4 p1) { return dot(p0, p1); }
 // CHECK: %hlsl.dot = fmul reassoc nnan ninf nsz arcp afn double
 // CHECK: ret double %hlsl.dot
 double test_dot_double(double p0, double p1) { return dot(p0, p1); }
+
+// CHECK-LABEL: test_dot_literal
+// CHECK: [[X:%.*]] = shufflevector <1 x i32> {{.*}}, <1 x i32> poison, <4 x i32> zeroinitializer
+// CHECK-NEXT: %hlsl.dot = call i32 @llvm.[[ICF]].udot.v4i32(<4 x i32> {{.*}}, <4 x i32> [[X]])
+// CHECK-NEXT: [[S1:%.*]] = insertelement <4 x i32> poison, i32 %hlsl.dot, i64 0
+// CHECK-NEXT: [[S2:%.*]] = shufflevector <4 x i32> [[S1]], <4 x i32> poison, <4 x i32> zeroinitializer
+// CHECK-NEXT: ret <4 x i32> [[S2]]
+uint4 test_dot_literal( uint4 p0) { return dot(p0, 1u.xxxx); }