[llvm-objdump][Wasm][NFC] Create WasmDump.h

Summary:
Continuing from D77285, the external interfaces implemented by
`WasmDump.cpp` are now declared in `WasmDump.h` and moved into the
`llvm::objdump` namespace.

Reviewers: jhenderson, MaskRay, DiggerLin, jasonliu, daltenty

Reviewed By: jhenderson, MaskRay

Differential Revision: https://reviews.llvm.org/D77990

llvm/tools/llvm-objdump/WasmDump.cpp

@@ -11,13 +11,15 @@
 ///
 //===----------------------------------------------------------------------===//
 
+#include "WasmDump.h"
+
 #include "llvm-objdump.h"
 #include "llvm/Object/Wasm.h"
 
+using namespace llvm;
 using namespace llvm::object;
 
-namespace llvm {
-void printWasmFileHeader(const object::ObjectFile *Obj) {
+void objdump::printWasmFileHeader(const object::ObjectFile *Obj) {
   const auto *File = dyn_cast<const WasmObjectFile>(Obj);
 
   outs() << "Program Header:\n";
@@ -26,9 +28,9 @@ void printWasmFileHeader(const object::ObjectFile *Obj) {
   outs() << "\n";
 }
 
-Error getWasmRelocationValueString(const WasmObjectFile *Obj,
-                                         const RelocationRef &RelRef,
-                                         SmallVectorImpl<char> &Result) {
+Error objdump::getWasmRelocationValueString(const WasmObjectFile *Obj,
+                                            const RelocationRef &RelRef,
+                                            SmallVectorImpl<char> &Result) {
   const wasm::WasmRelocation &Rel = Obj->getWasmRelocation(RelRef);
   symbol_iterator SI = RelRef.getSymbol();
   std::string FmtBuf;
@@ -49,4 +51,3 @@ Error getWasmRelocationValueString(const WasmObjectFile *Obj,
   Result.append(FmtBuf.begin(), FmtBuf.end());
   return Error::success();
 }
-} // namespace llvm

llvm/tools/llvm-objdump/WasmDump.h

@@ -0,0 +1,35 @@
+//===-- WasmDump.h - wasm-specific dumper -----------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TOOLS_LLVM_OBJDUMP_WASMDUMP_H
+#define LLVM_TOOLS_LLVM_OBJDUMP_WASMDUMP_H
+
+#include "llvm/ADT/SmallVector.h"
+
+namespace llvm {
+
+class Error;
+
+namespace object {
+class WasmObjectFile;
+class ObjectFile;
+class RelocationRef;
+} // namespace object
+
+namespace objdump {
+
+Error getWasmRelocationValueString(const object::WasmObjectFile *Obj,
+                                   const object::RelocationRef &RelRef,
+                                   llvm::SmallVectorImpl<char> &Result);
+
+void printWasmFileHeader(const object::ObjectFile *O);
+
+} // namespace objdump
+} // namespace llvm
+
+#endif

llvm/tools/llvm-objdump/llvm-objdump.cpp

@@ -18,6 +18,7 @@
 #include "llvm-objdump.h"
 #include "COFFDump.h"
 #include "MachODump.h"
+#include "WasmDump.h"
 #include "XCOFFDump.h"
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/STLExtras.h"

llvm/tools/llvm-objdump/llvm-objdump.h

@@ -118,17 +118,13 @@ SectionFilter ToolSectionFilter(llvm::object::ObjectFile const &O,
 Error getELFRelocationValueString(const object::ELFObjectFileBase *Obj,
                                   const object::RelocationRef &Rel,
                                   llvm::SmallVectorImpl<char> &Result);
-Error getWasmRelocationValueString(const object::WasmObjectFile *Obj,
-                                   const object::RelocationRef &RelRef,
-                                   llvm::SmallVectorImpl<char> &Result);
 
 uint64_t getELFSectionLMA(const object::ELFSectionRef& Sec);
 
 bool isRelocAddressLess(object::RelocationRef A, object::RelocationRef B);
 void printELFFileHeader(const object::ObjectFile *O);
 void printELFDynamicSection(const object::ObjectFile *Obj);
 void printELFSymbolVersionInfo(const object::ObjectFile *Obj);
-void printWasmFileHeader(const object::ObjectFile *O);
 void printRawClangAST(const object::ObjectFile *O);
 void printRelocations(const object::ObjectFile *O);
 void printDynamicRelocations(const object::ObjectFile *O);