[WebAssembly] clang-tidy (NFC)

Summary:
This patch fixes clang-tidy warnings on wasm-only files.
The list of checks used is:
`-*,clang-diagnostic-*,llvm-*,misc-*,-misc-unused-parameters,readability-identifier-naming,modernize-*`
(LLVM's default .clang-tidy list is the same except it does not have
`modernize-*`.)

The list of fixes are:
- Variable names start with an uppercase letter
- Function names start with a lowercase letter
- Use `auto` when you use casts so the type is evident

Reviewers: sbc100

Subscribers: dschuff, jgravelle-google, sunfish, llvm-commits

Differential Revision: https://reviews.llvm.org/D57499

llvm-svn: 353076

Author: aheejin

lld/wasm/InputChunks.cpp

@@ -22,7 +22,7 @@ using namespace llvm::support::endian;
 using namespace lld;
 using namespace lld::wasm;
 
-static StringRef ReloctTypeToString(uint8_t RelocType) {
+static StringRef reloctTypeToString(uint8_t RelocType) {
   switch (RelocType) {
 #define WASM_RELOC(NAME, REL)                                                  \
   case REL:                                                                    \
@@ -76,7 +76,7 @@ void InputChunk::verifyRelocTargets() const {
       warn("expected LEB at relocation site be 5-byte padded");
     uint32_t ExpectedValue = File->calcExpectedValue(Rel);
     if (ExpectedValue != ExistingValue)
-      warn("unexpected existing value for " + ReloctTypeToString(Rel.Type) +
+      warn("unexpected existing value for " + reloctTypeToString(Rel.Type) +
            ": existing=" + Twine(ExistingValue) +
            " expected=" + Twine(ExpectedValue));
   }
@@ -102,7 +102,7 @@ void InputChunk::writeTo(uint8_t *Buf) const {
   for (const WasmRelocation &Rel : Relocations) {
     uint8_t *Loc = Buf + Rel.Offset + Off;
     uint32_t Value = File->calcNewValue(Rel);
-    LLVM_DEBUG(dbgs() << "apply reloc: type=" << ReloctTypeToString(Rel.Type)
+    LLVM_DEBUG(dbgs() << "apply reloc: type=" << reloctTypeToString(Rel.Type)
                       << " addend=" << Rel.Addend << " index=" << Rel.Index
                       << " value=" << Value << " offset=" << Rel.Offset
                       << "\n");

lld/wasm/InputFiles.cpp

@@ -447,7 +447,7 @@ static Symbol *createBitcodeSymbol(const lto::InputFile::Symbol &ObjSym,
 
   if (ObjSym.isUndefined()) {
     if (ObjSym.isExecutable())
-      return Symtab->addUndefinedFunction(Name, kDefaultModule, Flags, &F, nullptr);
+      return Symtab->addUndefinedFunction(Name, DefaultModule, Flags, &F, nullptr);
     return Symtab->addUndefinedData(Name, Flags, &F);
   }
 

lld/wasm/LTO.cpp

@@ -80,7 +80,7 @@ BitcodeCompiler::~BitcodeCompiler() = default;
 
 static void undefine(Symbol *S) {
   if (auto F = dyn_cast<DefinedFunction>(S))
-    replaceSymbol<UndefinedFunction>(F, F->getName(), kDefaultModule, 0,
+    replaceSymbol<UndefinedFunction>(F, F->getName(), DefaultModule, 0,
                                      F->getFile(), F->Signature);
   else if (isa<DefinedData>(S))
     replaceSymbol<UndefinedData>(S, S->getName(), 0, S->getFile());

lld/wasm/MarkLive.cpp

@@ -84,7 +84,7 @@ void lld::wasm::markLive() {
       // equal to null pointer, only reachable via direct call).
       if (Reloc.Type == R_WASM_TABLE_INDEX_SLEB ||
           Reloc.Type == R_WASM_TABLE_INDEX_I32) {
-        FunctionSymbol *FuncSym = cast<FunctionSymbol>(Sym);
+        auto *FuncSym = cast<FunctionSymbol>(Sym);
         if (FuncSym->hasTableIndex() && FuncSym->getTableIndex() == 0)
           continue;
       }

lld/wasm/Writer.cpp

@@ -39,9 +39,9 @@ using namespace llvm::wasm;
 using namespace lld;
 using namespace lld::wasm;
 
-static constexpr int kStackAlignment = 16;
-static constexpr const char *kFunctionTableName = "__indirect_function_table";
-const char *lld::wasm::kDefaultModule = "env";
+static constexpr int StackAlignment = 16;
+static constexpr const char *FunctionTableName = "__indirect_function_table";
+const char *lld::wasm::DefaultModule = "env";
 
 namespace {
 
@@ -157,7 +157,7 @@ void Writer::createImportSection() {
 
   if (Config->ImportMemory) {
     WasmImport Import;
-    Import.Module = kDefaultModule;
+    Import.Module = DefaultModule;
     Import.Field = "memory";
     Import.Kind = WASM_EXTERNAL_MEMORY;
     Import.Memory.Flags = 0;
@@ -174,8 +174,8 @@ void Writer::createImportSection() {
   if (Config->ImportTable) {
     uint32_t TableSize = TableBase + IndirectFunctions.size();
     WasmImport Import;
-    Import.Module = kDefaultModule;
-    Import.Field = kFunctionTableName;
+    Import.Module = DefaultModule;
+    Import.Field = FunctionTableName;
     Import.Kind = WASM_EXTERNAL_TABLE;
     Import.Table.ElemType = WASM_TYPE_FUNCREF;
     Import.Table.Limits = {0, TableSize, 0};
@@ -187,7 +187,7 @@ void Writer::createImportSection() {
     if (auto *F = dyn_cast<UndefinedFunction>(Sym))
       Import.Module = F->Module;
     else
-      Import.Module = kDefaultModule;
+      Import.Module = DefaultModule;
 
     Import.Field = Sym->getName();
     if (auto *FunctionSym = dyn_cast<FunctionSymbol>(Sym)) {
@@ -709,9 +709,9 @@ void Writer::layoutMemory() {
   auto PlaceStack = [&]() {
     if (Config->Relocatable || Config->Shared)
       return;
-    MemoryPtr = alignTo(MemoryPtr, kStackAlignment);
-    if (Config->ZStackSize != alignTo(Config->ZStackSize, kStackAlignment))
-      error("stack size must be " + Twine(kStackAlignment) + "-byte aligned");
+    MemoryPtr = alignTo(MemoryPtr, StackAlignment);
+    if (Config->ZStackSize != alignTo(Config->ZStackSize, StackAlignment))
+      error("stack size must be " + Twine(StackAlignment) + "-byte aligned");
     log("mem: stack size  = " + Twine(Config->ZStackSize));
     log("mem: stack base  = " + Twine(MemoryPtr));
     MemoryPtr += Config->ZStackSize;
@@ -864,7 +864,7 @@ void Writer::calculateExports() {
     Exports.push_back(WasmExport{"memory", WASM_EXTERNAL_MEMORY, 0});
 
   if (!Config->Relocatable && Config->ExportTable)
-    Exports.push_back(WasmExport{kFunctionTableName, WASM_EXTERNAL_TABLE, 0});
+    Exports.push_back(WasmExport{FunctionTableName, WASM_EXTERNAL_TABLE, 0});
 
   unsigned FakeGlobalIndex = NumImportedGlobals + InputGlobals.size();
 

lld/wasm/Writer.h

@@ -14,7 +14,7 @@ namespace wasm {
 
 void writeResult();
 
-extern const char *kDefaultModule;
+extern const char *DefaultModule;
 
 } // namespace wasm
 } // namespace lld