In instcombine's debug output, avoid printing ADD for instructions that are

already on the worklist, and print Visited when an instruction is about to be
visited.  Net, on one input, this reduced the output size by at least 9x.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@83510 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp
index 66776dde4ca4b423876a5f96151135174fdf04db..bb0e0996bf27074e7de636e7fbd1889e68cb81dc 100644 (file)
--- a/lib/Transforms/Scalar/InstructionCombining.cpp
+++ b/lib/Transforms/Scalar/InstructionCombining.cpp
@@ -90,9 +90,10 @@ namespace {
     /// Add - Add the specified instruction to the worklist if it isn't already
     /// in it.
     void Add(Instruction *I) {
-      DEBUG(errs() << "IC: ADD: " << *I << '\n');
-      if (WorklistMap.insert(std::make_pair(I, Worklist.size())).second)
+      if (WorklistMap.insert(std::make_pair(I, Worklist.size())).second) {
+        DEBUG(errs() << "IC: ADD: " << *I << '\n');
         Worklist.push_back(I);
+      }
     }
     
     void AddValue(Value *V) {
@@ -12853,7 +12854,8 @@ bool InstCombiner::DoOneIteration(Function &F, unsigned Iteration) {
     std::string OrigI;
 #endif
     DEBUG(raw_string_ostream SS(OrigI); I->print(SS); OrigI = SS.str(););
-    
+    DEBUG(errs() << "IC: Visiting: " << OrigI << '\n');
+
     if (Instruction *Result = visit(*I)) {
       ++NumCombined;
       // Should we replace the old instruction with a new one?