[clang] [llvm] [HLSL][DXIL][SPIRV] Create llvm dot intrinsic and use for HLSL (PR #102872)

[Farzon Lotfi via cfe-commits]

================
@@ -18528,37 +18520,38 @@ Value *CodeGenFunction::EmitHLSLBuiltinExpr(unsigned 
BuiltinID,
     Value *Op1 = EmitScalarExpr(E->getArg(1));
     llvm::Type *T0 = Op0->getType();
     llvm::Type *T1 = Op1->getType();
+
+    // If the arguments are scalars, just emit a multiply
     if (!T0->isVectorTy() && !T1->isVectorTy()) {
       if (T0->isFloatingPointTy())
-        return Builder.CreateFMul(Op0, Op1, "dx.dot");
+        return Builder.CreateFMul(Op0, Op1, "dot");
 
       if (T0->isIntegerTy())
-        return Builder.CreateMul(Op0, Op1, "dx.dot");
+        return Builder.CreateMul(Op0, Op1, "dot");
----------------
farzonl wrote:

`hlsl.dot`

https://github.com/llvm/llvm-project/pull/102872
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