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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
//===-- NVPTXAssignValidGlobalNames.cpp - Assign valid names to globals ---===//
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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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// Clean up the names of global variables in the module to not contain symbols
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// that are invalid in PTX.
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//
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// Currently NVPTX, like other backends, relies on generic symbol name
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// sanitizing done by MC. However, the ptxas assembler is more stringent and
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// disallows some additional characters in symbol names. This pass makes sure
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// such names do not reach MC at all.
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//
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//===----------------------------------------------------------------------===//
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#include "NVPTX.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/GlobalVariable.h"
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#include "llvm/IR/LegacyPassManager.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Support/raw_ostream.h"
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#include <string>
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using namespace llvm;
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namespace {
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/// NVPTXAssignValidGlobalNames
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class NVPTXAssignValidGlobalNames : public ModulePass {
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public:
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static char ID;
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NVPTXAssignValidGlobalNames() : ModulePass(ID) {}
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bool runOnModule(Module &M) override;
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/// Clean up the name to remove symbols invalid in PTX.
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std::string cleanUpName(StringRef Name);
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};
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}
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char NVPTXAssignValidGlobalNames::ID = 0;
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namespace llvm {
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void initializeNVPTXAssignValidGlobalNamesPass(PassRegistry &);
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}
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INITIALIZE_PASS(NVPTXAssignValidGlobalNames, "nvptx-assign-valid-global-names",
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"Assign valid PTX names to globals", false, false)
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bool NVPTXAssignValidGlobalNames::runOnModule(Module &M) {
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for (GlobalVariable &GV : M.globals()) {
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// We are only allowed to rename local symbols.
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if (GV.hasLocalLinkage()) {
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// setName doesn't do extra work if the name does not change.
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// Note: this does not create collisions - if setName is asked to set the
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// name to something that already exists, it adds a proper postfix to
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// avoid collisions.
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GV.setName(cleanUpName(GV.getName()));
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}
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}
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// Do the same for local functions.
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for (Function &F : M.functions())
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if (F.hasLocalLinkage())
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F.setName(cleanUpName(F.getName()));
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return true;
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}
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std::string NVPTXAssignValidGlobalNames::cleanUpName(StringRef Name) {
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std::string ValidName;
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raw_string_ostream ValidNameStream(ValidName);
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for (unsigned I = 0, E = Name.size(); I != E; ++I) {
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char C = Name[I];
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if (C == '.' || C == '@') {
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ValidNameStream << "_$_";
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} else {
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ValidNameStream << C;
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}
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}
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return ValidNameStream.str();
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}
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ModulePass *llvm::createNVPTXAssignValidGlobalNamesPass() {
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return new NVPTXAssignValidGlobalNames();
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}
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