6180964a01
Add vscale range attirbute for the Scalable Vector Extension (SVE) if provided on the command-line (options in a previous commit) If no command-line option is provided, if the target-feature of SVE is specified and the architecture is AArch64, it defualts to 128-2048. in other words a vscale-min of 1, vscale-max of 16. A pass is used to add the atribute to all functions. The vectorizer will use this attribute to generate the SVE instruction to match the range specified. The attribute is harmless if there is no vectorizable operations in the function.
91 lines
3.1 KiB
C++
91 lines
3.1 KiB
C++
//===- VScaleAttr.cpp -------------------------------------------------===//
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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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//===----------------------------------------------------------------------===//
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/// \file
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/// This pass adds a `vscale_range` attribute to function definitions.
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/// The attribute is used for scalable vector operations on Arm processors
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/// and should only be run on processors that support this feature. [It is
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/// likely harmless to run it on something else, but it is also not valuable].
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//===----------------------------------------------------------------------===//
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#include "flang/ISO_Fortran_binding_wrapper.h"
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#include "flang/Optimizer/Builder/BoxValue.h"
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#include "flang/Optimizer/Builder/FIRBuilder.h"
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#include "flang/Optimizer/Builder/Runtime/Inquiry.h"
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#include "flang/Optimizer/Dialect/FIRDialect.h"
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#include "flang/Optimizer/Dialect/FIROps.h"
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#include "flang/Optimizer/Dialect/FIRType.h"
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#include "flang/Optimizer/Dialect/Support/FIRContext.h"
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#include "flang/Optimizer/Dialect/Support/KindMapping.h"
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#include "flang/Optimizer/Transforms/Passes.h"
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#include "mlir/Dialect/LLVMIR/LLVMAttrs.h"
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#include "mlir/Dialect/LLVMIR/LLVMDialect.h"
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#include "mlir/IR/Matchers.h"
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#include "mlir/IR/TypeUtilities.h"
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#include "mlir/Pass/Pass.h"
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#include "mlir/Transforms/DialectConversion.h"
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#include "mlir/Transforms/GreedyPatternRewriteDriver.h"
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#include "mlir/Transforms/RegionUtils.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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namespace fir {
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#define GEN_PASS_DECL_VSCALEATTR
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#define GEN_PASS_DEF_VSCALEATTR
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#include "flang/Optimizer/Transforms/Passes.h.inc"
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} // namespace fir
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#define DEBUG_TYPE "vscale-attr"
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namespace {
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class VScaleAttrPass : public fir::impl::VScaleAttrBase<VScaleAttrPass> {
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public:
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VScaleAttrPass(const fir::VScaleAttrOptions &options) {
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vscaleRange = options.vscaleRange;
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}
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VScaleAttrPass() {}
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void runOnOperation() override;
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};
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} // namespace
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void VScaleAttrPass::runOnOperation() {
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LLVM_DEBUG(llvm::dbgs() << "=== Begin " DEBUG_TYPE " ===\n");
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mlir::func::FuncOp func = getOperation();
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LLVM_DEBUG(llvm::dbgs() << "Func-name:" << func.getSymName() << "\n");
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auto context = &getContext();
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auto intTy = mlir::IntegerType::get(context, 32);
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assert(vscaleRange.first && "VScaleRange minimum should be non-zero");
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func->setAttr("vscale_range",
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mlir::LLVM::VScaleRangeAttr::get(
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context, mlir::IntegerAttr::get(intTy, vscaleRange.first),
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mlir::IntegerAttr::get(intTy, vscaleRange.second)));
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LLVM_DEBUG(llvm::dbgs() << "=== End " DEBUG_TYPE " ===\n");
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}
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std::unique_ptr<mlir::Pass>
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fir::createVScaleAttrPass(std::pair<unsigned, unsigned> vscaleAttr) {
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VScaleAttrOptions opts;
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opts.vscaleRange = vscaleAttr;
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return std::make_unique<VScaleAttrPass>(opts);
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}
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std::unique_ptr<mlir::Pass> fir::createVScaleAttrPass() {
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return std::make_unique<VScaleAttrPass>();
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}
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