[StructurizeCFG] Use an inheriting constructor.

[arsenm]

LGTM. Could we just get rid of the argumentless one and use a default argument?

[jlebar]

Merge the two constructors into one.

[jlebar]

Sure, done.

[arsenm]

LGTM

llvm/lib/Transforms/Scalar/StructurizeCFG.cpp

class StructurizeCFG : public RegionPass {
 
   void createFlow();
 
   void rebuildSSA();
 
 public:
   static char ID;
 
-  StructurizeCFG() :
-    RegionPass(ID), SkipUniformRegions(false) {
-    initializeStructurizeCFGPass(*PassRegistry::getPassRegistry());
-  }
+  StructurizeCFG() : StructurizeCFG(/* SkipUniformRegions = */ false) {}
 
   StructurizeCFG(bool SkipUniformRegions) :
     RegionPass(ID), SkipUniformRegions(SkipUniformRegions) {
     initializeStructurizeCFGPass(*PassRegistry::getPassRegistry());
   }
 
   using Pass::doInitialization;
   bool doInitialization(Region *R, RGPassManager &RGM) override;