de1a97db39
This change implements lowering for #70076, #70100, #70072, & #70102 `CGBuiltin.cpp` - - simplify `lerp` intrinsic `IntrinsicsDirectX.td` - simplify `lerp` intrinsic `SemaChecking.cpp` - remove unnecessary check `DXILIntrinsicExpansion.*` - add intrinsic to instruction expansion cases `DXILOpLowering.cpp` - make sure `DXILIntrinsicExpansion` happens first `DirectX.h` - changes to support new pass `DirectXTargetMachine.cpp` - changes to support new pass Why `any`, and `lerp` as instruction expansion just for DXIL? - SPIR-V there is an [OpAny](https://registry.khronos.org/SPIR-V/specs/unified1/SPIRV.html#OpAny) - SPIR-V has a GLSL lerp extension via [Fmix](https://registry.khronos.org/SPIR-V/specs/1.0/GLSL.std.450.html#FMix) Why `exp` instruction expansion? - We have an `exp2` opcode and `exp` reuses that opcode. So instruction expansion is a convenient way to do preprocessing. - Further SPIR-V has a GLSL exp extension via [Exp](https://registry.khronos.org/SPIR-V/specs/1.0/GLSL.std.450.html#Exp) and [Exp2](https://registry.khronos.org/SPIR-V/specs/1.0/GLSL.std.450.html#Exp2) Why `rcp` as instruction expansion? This one is a bit of the odd man out and might have to move to `cgbuiltins` when we better understand SPIRV requirements. However I included it because it seems like [fast math mode has an AllowRecip flag](https://registry.khronos.org/SPIR-V/specs/unified1/SPIRV.html#_fp_fast_math_mode) which lets you compute the reciprocal without performing the division. We don't have that in DXIL so thought to include it.
34 lines
1.1 KiB
C++
34 lines
1.1 KiB
C++
//===- DXILIntrinsicExpansion.h - Prepare LLVM Module for DXIL encoding----===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TARGET_DIRECTX_DXILINTRINSICEXPANSION_H
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#define LLVM_TARGET_DIRECTX_DXILINTRINSICEXPANSION_H
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#include "DXILResource.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/Pass.h"
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namespace llvm {
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/// A pass that transforms DXIL Intrinsics that don't have DXIL opCodes
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class DXILIntrinsicExpansion : public PassInfoMixin<DXILIntrinsicExpansion> {
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public:
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PreservedAnalyses run(Module &M, ModuleAnalysisManager &);
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};
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class DXILIntrinsicExpansionLegacy : public ModulePass {
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public:
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bool runOnModule(Module &M) override;
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DXILIntrinsicExpansionLegacy() : ModulePass(ID) {}
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static char ID; // Pass identification.
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};
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} // namespace llvm
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#endif // LLVM_TARGET_DIRECTX_DXILINTRINSICEXPANSION_H
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