Add RegionPass support.

A RegionPass is executed like a LoopPass but on the regions detected by the
RegionInfo pass instead of the loops detected by the LoopInfo pass.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116905 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 38 insertions, 0 deletions

diff --git a/tools/opt/opt.cpp b/tools/opt/opt.cpp
index 1324285658..50f327f894 100644
--- a/tools/opt/opt.cpp
+++ b/tools/opt/opt.cpp
@@ -20,6 +20,7 @@
 #include "llvm/Assembly/PrintModulePass.h"
 #include "llvm/Analysis/Verifier.h"
 #include "llvm/Analysis/LoopPass.h"
+#include "llvm/Analysis/RegionPass.h"
 #include "llvm/Analysis/CallGraph.h"
 #include "llvm/Target/TargetData.h"
 #include "llvm/Target/TargetMachine.h"
@@ -267,6 +268,40 @@ struct LoopPassPrinter : public LoopPass {
 
 char LoopPassPrinter::ID = 0;
 
+struct RegionPassPrinter : public RegionPass {
+  static char ID;
+  const PassInfo *PassToPrint;
+  raw_ostream &Out;
+  std::string PassName;
+
+  RegionPassPrinter(const PassInfo *PI, raw_ostream &out) : RegionPass(ID),
+    PassToPrint(PI), Out(out) {
+    std::string PassToPrintName =  PassToPrint->getPassName();
+    PassName = "LoopPass Printer: " + PassToPrintName;
+  }
+
+  virtual bool runOnRegion(Region *R, RGPassManager &RGM) {
+    if (!Quiet) {
+      Out << "Printing analysis '" << PassToPrint->getPassName() << "' for "
+        << "region: '" << R->getNameStr() << "' in function '"
+        << R->getEntry()->getParent()->getNameStr() << "':\n";
+    }
+    // Get and print pass...
+   getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
+                       R->getEntry()->getParent()->getParent());
+    return false;
+  }
+
+  virtual const char *getPassName() const { return "'Pass' Printer"; }
+
+  virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+    AU.addRequiredID(PassToPrint->getTypeInfo());
+    AU.setPreservesAll();
+  }
+};
+
+char RegionPassPrinter::ID = 0;
+
 struct BasicBlockPassPrinter : public BasicBlockPass {
   const PassInfo *PassToPrint;
   raw_ostream &Out;
@@ -526,6 +561,9 @@ int main(int argc, char **argv) {
         case PT_BasicBlock:
           Passes.add(new BasicBlockPassPrinter(PassInf, Out->os()));
           break;
+        case PT_Region:
+          Passes.add(new RegionPassPrinter(PassInf, Out->os()));
+          break;
         case PT_Loop:
           Passes.add(new LoopPassPrinter(PassInf, Out->os()));
           break;