1
0
mirror of https://github.com/RPCS3/llvm-mirror.git synced 2024-11-25 04:02:41 +01:00
llvm-mirror/lib/Target/NVPTX/NVPTXAssignValidGlobalNames.cpp
Alexander Kornienko f993659b8f Revert r240137 (Fixed/added namespace ending comments using clang-tidy. NFC)
Apparently, the style needs to be agreed upon first.

llvm-svn: 240390
2015-06-23 09:49:53 +00:00

85 lines
2.5 KiB
C++

//===-- NVPTXAssignValidGlobalNames.cpp - Assign valid names to globals ---===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Clean up the names of global variables in the module to not contain symbols
// that are invalid in PTX.
//
// Currently NVPTX, like other backends, relies on generic symbol name
// sanitizing done by MC. However, the ptxas assembler is more stringent and
// disallows some additional characters in symbol names. This pass makes sure
// such names do not reach MC at all.
//
//===----------------------------------------------------------------------===//
#include "NVPTX.h"
#include "llvm/IR/GlobalVariable.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/raw_ostream.h"
#include <string>
using namespace llvm;
namespace {
/// \brief NVPTXAssignValidGlobalNames
class NVPTXAssignValidGlobalNames : public ModulePass {
public:
static char ID;
NVPTXAssignValidGlobalNames() : ModulePass(ID) {}
bool runOnModule(Module &M) override;
/// \brief Clean up the name to remove symbols invalid in PTX.
std::string cleanUpName(StringRef Name);
};
}
char NVPTXAssignValidGlobalNames::ID = 0;
namespace llvm {
void initializeNVPTXAssignValidGlobalNamesPass(PassRegistry &);
}
INITIALIZE_PASS(NVPTXAssignValidGlobalNames, "nvptx-assign-valid-global-names",
"Assign valid PTX names to globals", false, false)
bool NVPTXAssignValidGlobalNames::runOnModule(Module &M) {
for (GlobalVariable &GV : M.globals()) {
// We are only allowed to rename local symbols.
if (GV.hasLocalLinkage()) {
// setName doesn't do extra work if the name does not change.
// Note: this does not create collisions - if setName is asked to set the
// name to something that already exists, it adds a proper postfix to
// avoid collisions.
GV.setName(cleanUpName(GV.getName()));
}
}
return true;
}
std::string NVPTXAssignValidGlobalNames::cleanUpName(StringRef Name) {
std::string ValidName;
raw_string_ostream ValidNameStream(ValidName);
for (unsigned I = 0, E = Name.size(); I != E; ++I) {
char C = Name[I];
if (C == '.' || C == '@') {
ValidNameStream << "_$_";
} else {
ValidNameStream << C;
}
}
return ValidNameStream.str();
}
ModulePass *llvm::createNVPTXAssignValidGlobalNamesPass() {
return new NVPTXAssignValidGlobalNames();
}