Add targets to skip running the GC passes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170836 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 15 insertions, 3 deletions

diff --git a/include/llvm/CodeGen/Passes.h b/include/llvm/CodeGen/Passes.h
index 282e4edcfb..7831d1211e 100644
--- a/include/llvm/CodeGen/Passes.h
+++ b/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();
 
diff --git a/lib/CodeGen/Passes.cpp b/lib/CodeGen/Passes.cpp
index 96e2cf2d02..02ac836337 100644
--- a/lib/CodeGen/Passes.cpp
+++ b/lib/CodeGen/Passes.cpp
@@ -513,9 +513,10 @@ void TargetPassConfig::addMachinePasses() {
   }
 
   // GC
-  addPass(&GCMachineCodeAnalysisID);
-  if (PrintGCInfo)
-    addPass(createGCInfoPrinter(dbgs()));
+  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;