Add emitInstruction() API so that we can get the bytes of a simple instruction

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12252 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 20 insertions, 3 deletions

diff --git a/lib/Target/X86/X86CodeEmitter.cpp b/lib/Target/X86/X86CodeEmitter.cpp
index 99e63eb..29607da 100644
--- a/lib/Target/X86/X86CodeEmitter.cpp
+++ b/lib/Target/X86/X86CodeEmitter.cpp
@@ -168,7 +168,6 @@ unsigned JITResolver::emitStubForFunction(Function *F) {
 }
 
 
-
 namespace {
   class Emitter : public MachineFunctionPass {
     const X86InstrInfo  *II;
@@ -176,7 +175,9 @@ namespace {
     std::map<const BasicBlock*, unsigned> BasicBlockAddrs;
     std::vector<std::pair<const BasicBlock*, unsigned> > BBRefs;
   public:
-    Emitter(MachineCodeEmitter &mce) : II(0), MCE(mce) {}
+    explicit Emitter(MachineCodeEmitter &mce) : II(0), MCE(mce) {}
+    Emitter(MachineCodeEmitter &mce, const X86InstrInfo& ii)
+        : II(&ii), MCE(mce) {}
 
     bool runOnMachineFunction(MachineFunction &MF);
 
@@ -184,9 +185,10 @@ namespace {
       return "X86 Machine Code Emitter";
     }
 
+    void emitInstruction(const MachineInstr &MI);
+
   private:
     void emitBasicBlock(const MachineBasicBlock &MBB);
-    void emitInstruction(const MachineInstr &MI);
 
     void emitPCRelativeBlockAddress(const BasicBlock *BB);
     void emitMaybePCRelativeValue(unsigned Address, bool isPCRelative);
@@ -203,6 +205,14 @@ namespace {
   };
 }
 
+// This function is required by Printer.cpp to workaround gas bugs
+void llvm::X86::emitInstruction(MachineCodeEmitter& mce,
+                                const X86InstrInfo& ii,
+                                const MachineInstr& mi)
+{
+    Emitter(mce, ii).emitInstruction(mi);
+}
+
 /// addPassesToEmitMachineCode - Add passes to the specified pass manager to get
 /// machine code emitted.  This uses a MachineCodeEmitter object to handle
 /// actually outputting the machine code and resolving things like the address
diff --git a/lib/Target/X86/X86TargetMachine.h b/lib/Target/X86/X86TargetMachine.h
index de85f95..05b7414 100644
--- a/lib/Target/X86/X86TargetMachine.h
+++ b/lib/Target/X86/X86TargetMachine.h
@@ -53,6 +53,13 @@ public:
   virtual bool addPassesToEmitAssembly(PassManager &PM, std::ostream &Out);
 };
 
+  // this is implemented in X86CodeEmitter.cpp
+  namespace X86 {
+    void emitInstruction(MachineCodeEmitter& mce,
+                         const X86InstrInfo& ii,
+                         const MachineInstr& MI);
+  }
+
 } // End llvm namespace
 
 #endif