AMDGPU/NFC: Minor clean ups in PAL metadata

- Move PAL metadata definitions to AMDGPUMetadata
  - Make naming consistent with HSA metadata

Differential Revision: https://reviews.llvm.org/D38745


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@315523 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Support/AMDGPUMetadata.cpp

@@ -13,6 +13,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/ADT/Twine.h"
 #include "llvm/Support/AMDGPUMetadata.h"
 #include "llvm/Support/YAMLTraits.h"
 
@@ -213,5 +214,19 @@ std::error_code Metadata::toYamlString(
 }
 
 } // end namespace HSAMD
+
+namespace PALMD {
+
+std::error_code toString(const Metadata &PALMetadata, std::string &String) {
+  raw_string_ostream Stream(String);
+  for (auto I = PALMetadata.begin(), E = PALMetadata.end(); I != E; ++I) {
+    Stream << Twine(I == PALMetadata.begin() ? " 0x" : ",0x");
+    Stream << Twine::utohexstr(*I);
+  }
+  Stream.flush();
+  return std::error_code();
+}
+
+} // end namespace PALMD
 } // end namespace AMDGPU
 } // end namespace llvm