[PATCH] D16422: [opaque pointer types] [NFC] FindAvailableLoadedValue: take LoadInst instead of just the pointer.

[Eduard Burtescu via llvm-commits]

eddyb created this revision.
eddyb added reviewers: mjacob, dblaikie.
eddyb added a subscriber: llvm-commits.

http://reviews.llvm.org/D16422

Files:
  include/llvm/Analysis/Loads.h
  lib/Analysis/Lint.cpp
  lib/Analysis/Loads.cpp
  lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
  lib/Transforms/Scalar/JumpThreading.cpp

Index: lib/Transforms/Scalar/JumpThreading.cpp
===================================================================
--- lib/Transforms/Scalar/JumpThreading.cpp
+++ lib/Transforms/Scalar/JumpThreading.cpp
@@ -952,7 +952,7 @@
   BasicBlock::iterator BBIt(LI);
 
   if (Value *AvailableVal =
-        FindAvailableLoadedValue(LoadedPtr, LoadBB, BBIt, DefMaxInstsToScan)) {
+        FindAvailableLoadedValue(LI, LoadBB, BBIt, DefMaxInstsToScan)) {
     // If the value of the load is locally available within the block, just use
     // it.  This frequently occurs for reg2mem'd allocas.
     //cerr << "LOAD ELIMINATED:\n" << *BBIt << *LI << "\n";
@@ -994,7 +994,7 @@
     // Scan the predecessor to see if the value is available in the pred.
     BBIt = PredBB->end();
     AAMDNodes ThisAATags;
-    Value *PredAvailable = FindAvailableLoadedValue(LoadedPtr, PredBB, BBIt,
+    Value *PredAvailable = FindAvailableLoadedValue(LI, PredBB, BBIt,
                                                     DefMaxInstsToScan,
                                                     nullptr, &ThisAATags);
     if (!PredAvailable) {
Index: lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
===================================================================
--- lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
+++ lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
@@ -791,7 +791,7 @@
   BasicBlock::iterator BBI(LI);
   AAMDNodes AATags;
   if (Value *AvailableVal =
-      FindAvailableLoadedValue(Op, LI.getParent(), BBI,
+      FindAvailableLoadedValue(&LI, LI.getParent(), BBI,
                                DefMaxInstsToScan, AA, &AATags)) {
     if (LoadInst *NLI = dyn_cast<LoadInst>(AvailableVal)) {
       unsigned KnownIDs[] = {
Index: lib/Analysis/Loads.cpp
===================================================================
--- lib/Analysis/Loads.cpp
+++ lib/Analysis/Loads.cpp
@@ -196,14 +196,15 @@
 /// If \c AATags is non-null and a load or store is found, the AA tags from the
 /// load or store are recorded there. If there are no AA tags or if no access is
 /// found, it is left unmodified.
-Value *llvm::FindAvailableLoadedValue(Value *Ptr, BasicBlock *ScanBB,
+Value *llvm::FindAvailableLoadedValue(LoadInst *Load, BasicBlock *ScanBB,
                                       BasicBlock::iterator &ScanFrom,
                                       unsigned MaxInstsToScan,
                                       AliasAnalysis *AA, AAMDNodes *AATags) {
   if (MaxInstsToScan == 0)
     MaxInstsToScan = ~0U;
 
-  Type *AccessTy = cast<PointerType>(Ptr->getType())->getElementType();
+  Value *Ptr = Load->getPointerOperand();
+  Type *AccessTy = Load->getType();
 
   const DataLayout &DL = ScanBB->getModule()->getDataLayout();
 
Index: lib/Analysis/Lint.cpp
===================================================================
--- lib/Analysis/Lint.cpp
+++ lib/Analysis/Lint.cpp
@@ -642,8 +642,7 @@
       if (!VisitedBlocks.insert(BB).second)
         break;
       if (Value *U =
-          FindAvailableLoadedValue(L->getPointerOperand(),
-                                   BB, BBI, DefMaxInstsToScan, AA))
+          FindAvailableLoadedValue(L, BB, BBI, DefMaxInstsToScan, AA))
         return findValueImpl(U, OffsetOk, Visited);
       if (BBI != BB->begin()) break;
       BB = BB->getUniquePredecessor();
Index: include/llvm/Analysis/Loads.h
===================================================================
--- include/llvm/Analysis/Loads.h
+++ include/llvm/Analysis/Loads.h
@@ -51,7 +51,7 @@
 /// If AATags is non-null and a load or store is found, the AA tags from the
 /// load or store are recorded there.  If there are no AA tags or if no access
 /// is found, it is left unmodified.
-Value *FindAvailableLoadedValue(Value *Ptr, BasicBlock *ScanBB,
+Value *FindAvailableLoadedValue(LoadInst *Load, BasicBlock *ScanBB,
                                 BasicBlock::iterator &ScanFrom,
                                 unsigned MaxInstsToScan = DefMaxInstsToScan,
                                 AliasAnalysis *AA = nullptr,


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D16422.45572.patch
Type: text/x-patch
Size: 4071 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20160121/a0dc3ff1/attachment.bin>