67 lines · cpp
1//===-- NVPTXAssignValidGlobalNames.cpp - Assign valid names to globals ---===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8//9// Clean up the names of global variables in the module to not contain symbols10// that are invalid in PTX.11//12// Currently NVPTX, like other backends, relies on generic symbol name13// sanitizing done by MC. However, the ptxas assembler is more stringent and14// disallows some additional characters in symbol names. This pass makes sure15// such names do not reach MC at all.16//17//===----------------------------------------------------------------------===//18 19#include "NVPTX.h"20#include "NVPTXUtilities.h"21#include "llvm/IR/Function.h"22#include "llvm/IR/GlobalVariable.h"23#include "llvm/IR/LegacyPassManager.h"24#include "llvm/IR/Module.h"25 26using namespace llvm;27 28namespace {29/// NVPTXAssignValidGlobalNames30class NVPTXAssignValidGlobalNames : public ModulePass {31public:32 static char ID;33 NVPTXAssignValidGlobalNames() : ModulePass(ID) {}34 35 bool runOnModule(Module &M) override;36};37} // namespace38 39char NVPTXAssignValidGlobalNames::ID = 0;40 41INITIALIZE_PASS(NVPTXAssignValidGlobalNames, "nvptx-assign-valid-global-names",42 "Assign valid PTX names to globals", false, false)43 44bool NVPTXAssignValidGlobalNames::runOnModule(Module &M) {45 for (GlobalVariable &GV : M.globals()) {46 // We are only allowed to rename local symbols.47 if (GV.hasLocalLinkage()) {48 // setName doesn't do extra work if the name does not change.49 // Note: this does not create collisions - if setName is asked to set the50 // name to something that already exists, it adds a proper postfix to51 // avoid collisions.52 GV.setName(NVPTX::getValidPTXIdentifier(GV.getName()));53 }54 }55 56 // Do the same for local functions.57 for (Function &F : M.functions())58 if (F.hasLocalLinkage())59 F.setName(NVPTX::getValidPTXIdentifier(F.getName()));60 61 return true;62}63 64ModulePass *llvm::createNVPTXAssignValidGlobalNamesPass() {65 return new NVPTXAssignValidGlobalNames();66}67