From 3c14ca47fc057c5999cd41ce2782e0ebaa2bcf7d Mon Sep 17 00:00:00 2001
From: Daniel Dunbar <daniel@zuster.org>
Date: Wed, 11 Aug 2010 06:37:09 +0000
Subject: [PATCH] llvm-mc: Add -show-inst-operands, for dumping the parsed
 instruction representation before matching.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@110791 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/MC/MCParser/MCAsmParser.h |  5 +++++
 lib/MC/MCParser/AsmParser.cpp          | 15 +++++++++++++++
 lib/MC/MCParser/MCAsmParser.cpp        |  2 +-
 tools/llvm-mc/llvm-mc.cpp              |  5 +++++
 4 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/include/llvm/MC/MCParser/MCAsmParser.h b/include/llvm/MC/MCParser/MCAsmParser.h
index 9457987d230..b37d46cc5a2 100644
--- a/include/llvm/MC/MCParser/MCAsmParser.h
+++ b/include/llvm/MC/MCParser/MCAsmParser.h
@@ -39,6 +39,8 @@ private:
 
   TargetAsmParser *TargetParser;
 
+  unsigned ShowParsedOperands : 1;
+
 protected: // Can only create subclasses.
   MCAsmParser();
 
@@ -61,6 +63,9 @@ public:
   TargetAsmParser &getTargetParser() const { return *TargetParser; }
   void setTargetParser(TargetAsmParser &P);
 
+  bool getShowParsedOperands() const { return ShowParsedOperands; }
+  void setShowParsedOperands(bool Value) { ShowParsedOperands = Value; }
+
   /// Run - Run the parser on the input source buffer.
   virtual bool Run(bool NoInitialTextSection, bool NoFinalize = false) = 0;
 
diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp
index 70a37e3009b..016f8f96a36 100644
--- a/lib/MC/MCParser/AsmParser.cpp
+++ b/lib/MC/MCParser/AsmParser.cpp
@@ -916,6 +916,21 @@ bool AsmParser::ParseStatement() {
   if (!HadError && Lexer.isNot(AsmToken::EndOfStatement))
     HadError = TokError("unexpected token in argument list");
 
+  // Dump the parsed representation, if requested.
+  if (getShowParsedOperands()) {
+    SmallString<256> Str;
+    raw_svector_ostream OS(Str);
+    OS << "parsed instruction: [";
+    for (unsigned i = 0; i != ParsedOperands.size(); ++i) {
+      if (i != 0)
+        OS << ", ";
+      ParsedOperands[i]->dump(OS);
+    }
+    OS << "]";
+
+    PrintMessage(IDLoc, OS.str(), "note");
+  }
+
   // If parsing succeeded, match the instruction.
   if (!HadError) {
     MCInst Inst;
diff --git a/lib/MC/MCParser/MCAsmParser.cpp b/lib/MC/MCParser/MCAsmParser.cpp
index 0e0533b7370..70295efc613 100644
--- a/lib/MC/MCParser/MCAsmParser.cpp
+++ b/lib/MC/MCParser/MCAsmParser.cpp
@@ -15,7 +15,7 @@
 #include "llvm/Target/TargetAsmParser.h"
 using namespace llvm;
 
-MCAsmParser::MCAsmParser() : TargetParser(0) {
+MCAsmParser::MCAsmParser() : TargetParser(0), ShowParsedOperands(0) {
 }
 
 MCAsmParser::~MCAsmParser() {
diff --git a/tools/llvm-mc/llvm-mc.cpp b/tools/llvm-mc/llvm-mc.cpp
index 33531f18be1..94b11ebe64c 100644
--- a/tools/llvm-mc/llvm-mc.cpp
+++ b/tools/llvm-mc/llvm-mc.cpp
@@ -51,6 +51,10 @@ ShowEncoding("show-encoding", cl::desc("Show instruction encodings"));
 static cl::opt<bool>
 ShowInst("show-inst", cl::desc("Show internal instruction representation"));
 
+static cl::opt<bool>
+ShowInstOperands("show-inst-operands",
+                 cl::desc("Show instructions operands as parsed"));
+
 static cl::opt<unsigned>
 OutputAsmVariant("output-asm-variant",
                  cl::desc("Syntax variant to use for output printing"));
@@ -320,6 +324,7 @@ static int AssembleInput(const char *ProgName) {
     return 1;
   }
 
+  Parser->setShowParsedOperands(ShowInstOperands);
   Parser->setTargetParser(*TAP.get());
 
   int Res = Parser->Run(NoInitialTextSection);