Added llvm-mc support for parsing the .dump and .load directives.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75786 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/MC/MCStreamer.h

@@ -166,6 +166,18 @@ namespace llvm {
     /// @param FileName - The file to assemble at this point
     virtual void SwitchInputAssemblyFile(const char *FileName) = 0;
 
+    /// DumpSymbolsandMacros - Dump to the specified file in @param FileName all
+    /// symbols and macros at this point in the assembly.
+    ///
+    /// @param FileName - The file to dump the symbols and macros into.
+    virtual void DumpSymbolsandMacros(const char *FileName) = 0;
+
+    /// LoadSymbolsandMacros - Load from the specified file in @param FileName
+    /// symbols and macros into the assembler at this point in the assembly.
+    ///
+    /// @param FileName - The file to load the symbols and macros from.
+    virtual void LoadSymbolsandMacros(const char *FileName) = 0;
+
     /// @}
     /// @name Generating Data
     /// @{

lib/MC/MCAsmStreamer.cpp

@@ -59,6 +59,10 @@ namespace {
 
     virtual void SwitchInputAssemblyFile(const char *FileName);
 
+    virtual void DumpSymbolsandMacros(const char *FileName);
+
+    virtual void LoadSymbolsandMacros(const char *FileName);
+
     virtual void EmitBytes(const char *Data, unsigned Length);
 
     virtual void EmitValue(const MCValue &Value, unsigned Size);
@@ -143,6 +147,14 @@ void MCAsmStreamer::SwitchInputAssemblyFile(const char *FileName) {
   OS << ".include" << ' ' << FileName << '\n';
 }
 
+void MCAsmStreamer::DumpSymbolsandMacros(const char *FileName) {
+  OS << ".dump" << ' ' << FileName << '\n';
+}
+
+void MCAsmStreamer::LoadSymbolsandMacros(const char *FileName) {
+  OS << ".load" << ' ' << FileName << '\n';
+}
+
 void MCAsmStreamer::EmitAssignment(MCSymbol *Symbol, const MCValue &Value,
                                    bool MakeAbsolute) {
   assert(!Symbol->getSection() && "Cannot assign to a label!");

test/MC/AsmParser/directive_dump_and_load.s

@@ -0,0 +1,8 @@
+# RUN: llvm-mc %s | FileCheck %s
+
+# CHECK: TEST0:
+# CHECK: .dump "somefile"
+# CHECK: .load "jack and jill"
+TEST0:  
+	.dump       "somefile"
+ .load  "jack and jill"

tools/llvm-mc/AsmParser.cpp

@@ -537,6 +537,10 @@ bool AsmParser::ParseStatement() {
       return ParseDirectiveAbort();
     if (!strcmp(IDVal, ".include"))
       return ParseDirectiveInclude();
+    if (!strcmp(IDVal, ".dump"))
+      return ParseDirectiveDarwinDumpOrLoad(/*IsDump=*/true);
+    if (!strcmp(IDVal, ".load"))
+      return ParseDirectiveDarwinDumpOrLoad(/*IsLoad=*/false);
 
     Warning(IDLoc, "ignoring directive for now");
     EatToEndOfStatement();
@@ -1182,3 +1186,28 @@ bool AsmParser::ParseDirectiveInclude() {
 
   return false;
 }
+
+/// ParseDirectiveDarwinDumpOrLoad
+///  ::= ( .dump | .load ) "filename"
+bool AsmParser::ParseDirectiveDarwinDumpOrLoad(bool IsDump) {
+  const char *Str;
+
+  if (Lexer.isNot(asmtok::String))
+    return TokError("expected string in '.dump' or '.load' directive");
+  
+  Str = Lexer.getCurStrVal();
+
+  Lexer.Lex();
+
+  if (Lexer.isNot(asmtok::EndOfStatement))
+    return TokError("unexpected token in '.dump' or '.load' directive");
+  
+  Lexer.Lex();
+
+  if (IsDump)
+    Out.DumpSymbolsandMacros(Str);
+  else
+    Out.LoadSymbolsandMacros(Str);
+
+  return false;
+}

tools/llvm-mc/AsmParser.h

@@ -117,6 +117,8 @@ private:
 
   // Darwin specific ".subsections_via_symbols"
   bool ParseDirectiveDarwinSubsectionsViaSymbols();
+  // Darwin specific .dump and .load
+  bool ParseDirectiveDarwinDumpOrLoad(bool IsDump);
 
   bool ParseDirectiveAbort(); // ".abort"
   bool ParseDirectiveInclude(); // ".include"