[clang] [llvm] [DXIL] `exp`, `any`, `lerp`, & `rcp` Intrinsic Lowering (PR #84526)

[Justin Bogner via cfe-commits]

================
@@ -0,0 +1,187 @@
+//===- DXILIntrinsicExpansion.cpp - Prepare LLVM Module for DXIL encoding--===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file This file contains DXIL intrinsic expansions for those that don't have
+//  opcodes in DirectX Intermediate Language (DXIL).
+//===----------------------------------------------------------------------===//
+
+#include "DXILIntrinsicExpansion.h"
+#include "DirectX.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/CodeGen/Passes.h"
+#include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/Instruction.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/Intrinsics.h"
+#include "llvm/IR/IntrinsicsDirectX.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/PassManager.h"
+#include "llvm/IR/Type.h"
+#include "llvm/Pass.h"
+#include "llvm/Support/ErrorHandling.h"
+
+#define DEBUG_TYPE "dxil-intrinsic-expansion"
+#define M_LOG2E_F 1.44269504088896340735992468100189214f
----------------
bogner wrote:

You can get this from `llvm/Support/MathExtras.h` as `numbers::log2e`

https://github.com/llvm/llvm-project/pull/84526