move InstCombineWorklist out to its own header.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@92461 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/InstCombine/InstructionCombining.cpp b/lib/Transforms/InstCombine/InstructionCombining.cpp
index c0fce65..8b46a24 100644
--- a/lib/Transforms/InstCombine/InstructionCombining.cpp
+++ b/lib/Transforms/InstCombine/InstructionCombining.cpp
@@ -35,6 +35,7 @@
#define DEBUG_TYPE "instcombine"
#include "llvm/Transforms/Scalar.h"
+#include "InstCombineWorklist.h"
#include "llvm/IntrinsicInst.h"
#include "llvm/LLVMContext.h"
#include "llvm/Pass.h"
@@ -84,88 +85,6 @@
//SPF_ABS - TODO.
};
-namespace {
- /// InstCombineWorklist - This is the worklist management logic for
- /// InstCombine.
- class InstCombineWorklist {
- SmallVector<Instruction*, 256> Worklist;
- DenseMap<Instruction*, unsigned> WorklistMap;
-
- void operator=(const InstCombineWorklist&RHS); // DO NOT IMPLEMENT
- InstCombineWorklist(const InstCombineWorklist&); // DO NOT IMPLEMENT
- public:
- InstCombineWorklist() {}
-
- bool isEmpty() const { return Worklist.empty(); }
-
- /// Add - Add the specified instruction to the worklist if it isn't already
- /// in it.
- void Add(Instruction *I) {
- if (WorklistMap.insert(std::make_pair(I, Worklist.size())).second) {
- DEBUG(errs() << "IC: ADD: " << *I << '\n');
- Worklist.push_back(I);
- }
- }
-
- void AddValue(Value *V) {
- if (Instruction *I = dyn_cast<Instruction>(V))
- Add(I);
- }
-
- /// AddInitialGroup - Add the specified batch of stuff in reverse order.
- /// which should only be done when the worklist is empty and when the group
- /// has no duplicates.
- void AddInitialGroup(Instruction *const *List, unsigned NumEntries) {
- assert(Worklist.empty() && "Worklist must be empty to add initial group");
- Worklist.reserve(NumEntries+16);
- DEBUG(errs() << "IC: ADDING: " << NumEntries << " instrs to worklist\n");
- for (; NumEntries; --NumEntries) {
- Instruction *I = List[NumEntries-1];
- WorklistMap.insert(std::make_pair(I, Worklist.size()));
- Worklist.push_back(I);
- }
- }
-
- // Remove - remove I from the worklist if it exists.
- void Remove(Instruction *I) {
- DenseMap<Instruction*, unsigned>::iterator It = WorklistMap.find(I);
- if (It == WorklistMap.end()) return; // Not in worklist.
-
- // Don't bother moving everything down, just null out the slot.
- Worklist[It->second] = 0;
-
- WorklistMap.erase(It);
- }
-
- Instruction *RemoveOne() {
- Instruction *I = Worklist.back();
- Worklist.pop_back();
- WorklistMap.erase(I);
- return I;
- }
-
- /// AddUsersToWorkList - When an instruction is simplified, add all users of
- /// the instruction to the work lists because they might get more simplified
- /// now.
- ///
- void AddUsersToWorkList(Instruction &I) {
- for (Value::use_iterator UI = I.use_begin(), UE = I.use_end();
- UI != UE; ++UI)
- Add(cast<Instruction>(*UI));
- }
-
-
- /// Zap - check that the worklist is empty and nuke the backing store for
- /// the map if it is large.
- void Zap() {
- assert(WorklistMap.empty() && "Worklist empty, but map not?");
-
- // Do an explicit clear, this shrinks the map if needed.
- WorklistMap.clear();
- }
- };
-} // end anonymous namespace.
-
namespace {
/// InstCombineIRInserter - This is an IRBuilder insertion helper that works