Added Pass::createPass(ID) to handle pass configuration by ID

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150092 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/Passes.h

@@ -135,7 +135,7 @@ protected:
   ///
 
   /// Add a target-independent CodeGen pass at this point in the pipeline.
-  void addCommonPass(char &ID);
+  void addPass(char &ID);
 
   /// printNoVerify - Add a pass to dump the machine function, if debugging is
   /// enabled.

include/llvm/Pass.h

@@ -175,6 +175,10 @@ public:
   // argument string, or null if it is not known.
   static const PassInfo *lookupPassInfo(StringRef Arg);
 
+  // createPass - Create a object for the specified pass class,
+  // or null if it is not known.
+  static Pass *createPass(char &TI);
+
   /// getAnalysisIfAvailable<AnalysisType>() - Subclasses use this function to
   /// get analysis information that might be around, for example to update it.
   /// This is different than getAnalysis in that it can fail (if the analysis

lib/CodeGen/Passes.cpp

@@ -103,8 +103,12 @@ TargetPassConfig::TargetPassConfig()
   llvm_unreachable("TargetPassConfig should not be constructed on-the-fly");
 }
 
-void TargetPassConfig::addCommonPass(char &ID) {
-  // FIXME: about to be implemented.
+void TargetPassConfig::addPass(char &ID) {
+  // FIXME: check user overrides
+  Pass *P = Pass::createPass(ID);
+  if (!P)
+    llvm_unreachable("Pass ID not registered");
+  PM.add(P);
 }
 
 void TargetPassConfig::printNoVerify(const char *Banner) const {

lib/VMCore/Pass.cpp

@@ -189,6 +189,13 @@ const PassInfo *Pass::lookupPassInfo(StringRef Arg) {
   return PassRegistry::getPassRegistry()->getPassInfo(Arg);
 }
 
+Pass *Pass::createPass(char &TI) {
+  const PassInfo *PI = PassRegistry::getPassRegistry()->getPassInfo(&TI);
+  if (!PI)
+    return NULL;
+  return PI->createPass();
+}
+
 Pass *PassInfo::createPass() const {
   assert((!isAnalysisGroup() || NormalCtor) &&
          "No default implementation found for analysis group!");