Add targets to skip running the GC passes.

llvm-svn: 170836

llvm/include/llvm/CodeGen/Passes.h

@@ -241,6 +241,11 @@ protected:
     return false;
   }
 
+  /// addGCPasses - Add late codegen passes that analyze code for garbage
+  /// collection. This should return true if GC info should be printed after
+  /// these passes.
+  virtual bool addGCPasses();
+
   /// Add standard basic block placement passes.
   virtual void addBlockPlacement();
 

llvm/lib/CodeGen/Passes.cpp

@@ -513,9 +513,10 @@ void TargetPassConfig::addMachinePasses() {
   }
 
   // GC
-  addPass(&GCMachineCodeAnalysisID);
+  if (addGCPasses()) {
     if (PrintGCInfo)
       addPass(createGCInfoPrinter(dbgs()));
+  }
 
   // Basic block placement.
   if (getOptLevel() != CodeGenOpt::None)
@@ -732,6 +733,12 @@ void TargetPassConfig::addMachineLateOptimization() {
     printAndVerify("After copy propagation pass");
 }
 
+/// Add standard GC passes.
+bool TargetPassConfig::addGCPasses() {
+  addPass(&GCMachineCodeAnalysisID);
+  return true;
+}
+
 /// Add standard basic block placement passes.
 void TargetPassConfig::addBlockPlacement() {
   AnalysisID PassID = 0;