[ConstantHoisting] remove a LLVM_DEBUG statement

[nickdesaulniers]

Summary

There is no need to print the entire function after a transform via
LLVM_DEBUG statements. These can be emulated via:
$ llc -print-after=consthoist -filter-print-funcs=<function name>

Otherwise, this makes the output of
$ llc -debug-only=consthoist
too verbose.

[MaskRay]

I agree, we should just use regular dumping options.

llvm/lib/Transforms/Scalar/ConstantHoisting.cpp

bool MadeChange =
       Impl.runImpl(Fn, getAnalysis<TargetTransformInfoWrapperPass>().getTTI(Fn),
                    getAnalysis<DominatorTreeWrapperPass>().getDomTree(),
                    ConstHoistWithBlockFrequency
                        ? &getAnalysis<BlockFrequencyInfoWrapperPass>().getBFI()
                        : nullptr,
                    Fn.getEntryBlock(),
                    &getAnalysis<ProfileSummaryInfoWrapperPass>().getPSI());
 
-  if (MadeChange) {
-    LLVM_DEBUG(dbgs() << "********** Function after Constant Hoisting: "
-                      << Fn.getName() << '\n');
-    LLVM_DEBUG(dbgs() << Fn);
-  }
   LLVM_DEBUG(dbgs() << "********** End Constant Hoisting **********\n");
 
   return MadeChange;
 }
 
 /// Find the constant materialization insertion point.
 Instruction *ConstantHoistingPass::findMatInsertPt(Instruction *Inst,
                                                    unsigned Idx) const {