From 3538c808f8fd1d4124f0cda4c962467ec8ae5b70 Mon Sep 17 00:00:00 2001
From: Daniel Dunbar <daniel@zuster.org>
Date: Tue, 18 May 2010 17:22:19 +0000
Subject: [PATCH] llc (et al): Add support for --show-encoding and --show-inst.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104029 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/LLVMTargetMachine.cpp | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/lib/CodeGen/LLVMTargetMachine.cpp b/lib/CodeGen/LLVMTargetMachine.cpp
index 681b678c37f..9a776ed0e8d 100644
--- a/lib/CodeGen/LLVMTargetMachine.cpp
+++ b/lib/CodeGen/LLVMTargetMachine.cpp
@@ -65,6 +65,10 @@ static cl::opt<bool> PrintISelInput("print-isel-input", cl::Hidden,
     cl::desc("Print LLVM IR input to isel pass"));
 static cl::opt<bool> PrintGCInfo("print-gc", cl::Hidden,
     cl::desc("Dump garbage collector data"));
+static cl::opt<bool> ShowMCEncoding("show-mc-encoding", cl::Hidden,
+    cl::desc("Show encoding in .s output"));
+static cl::opt<bool> ShowMCInst("show-mc-inst", cl::Hidden,
+    cl::desc("Show instruction structure in .s output"));
 static cl::opt<bool> VerifyMachineCode("verify-machineinstrs", cl::Hidden,
     cl::desc("Verify generated machine code"),
     cl::init(getenv("LLVM_VERIFY_MACHINEINSTRS")!=NULL));
@@ -131,10 +135,18 @@ bool LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
   case CGFT_AssemblyFile: {
     MCInstPrinter *InstPrinter =
       getTarget().createMCInstPrinter(MAI.getAssemblerDialect(), MAI);
+
+    // Create a code emitter if asked to show the encoding.
+    //
+    // FIXME: These are currently leaked.
+    MCCodeEmitter *MCE = 0;
+    if (ShowMCEncoding)
+      MCE = getTarget().createCodeEmitter(*this, *Context);
+
     AsmStreamer.reset(createAsmStreamer(*Context, Out,
                                         getTargetData()->isLittleEndian(),
                                         getVerboseAsm(), InstPrinter,
-                                        /*codeemitter*/0));
+                                        MCE, ShowMCInst));
     break;
   }
   case CGFT_ObjectFile: {