vendor/llvm/llvm-trunk-r338150

1 files changed, 23 insertions, 38 deletions

diff --git a/lib/IR/Value.cpp b/lib/IR/Value.cpp
index 163c785f5d762..295d6ecf0db03 100644
--- a/lib/IR/Value.cpp
+++ b/lib/IR/Value.cpp
@@ -39,6 +39,10 @@
 
 using namespace llvm;
 
+static cl::opt<unsigned> NonGlobalValueMaxNameSize(
+    "non-global-value-max-name-size", cl::Hidden, cl::init(1024),
+    cl::desc("Maximum size for the name of non-global values."));
+
 //===----------------------------------------------------------------------===//
 //                                Value Class
 //===----------------------------------------------------------------------===//
@@ -244,6 +248,11 @@ void Value::setNameImpl(const Twine &NewName) {
   if (getName() == NameRef)
     return;
 
+  // Cap the size of non-GlobalValue names.
+  if (NameRef.size() > NonGlobalValueMaxNameSize && !isa<GlobalValue>(this))
+    NameRef =
+        NameRef.substr(0, std::max(1u, (unsigned)NonGlobalValueMaxNameSize));
+
   assert(!getType()->isVoidTy() && "Cannot assign a name to void values!");
 
   // Get the symbol table to update for this object.
@@ -456,41 +465,12 @@ void Value::replaceUsesOutsideBlock(Value *New, BasicBlock *BB) {
   }
 }
 
-void Value::replaceUsesExceptBlockAddr(Value *New) {
-  SmallSetVector<Constant *, 4> Constants;
-  use_iterator UI = use_begin(), E = use_end();
-  for (; UI != E;) {
-    Use &U = *UI;
-    ++UI;
-
-    if (isa<BlockAddress>(U.getUser()))
-      continue;
-
-    // Must handle Constants specially, we cannot call replaceUsesOfWith on a
-    // constant because they are uniqued.
-    if (auto *C = dyn_cast<Constant>(U.getUser())) {
-      if (!isa<GlobalValue>(C)) {
-        // Save unique users to avoid processing operand replacement
-        // more than once.
-        Constants.insert(C);
-        continue;
-      }
-    }
-
-    U.set(New);
-  }
-
-  // Process operand replacement of saved constants.
-  for (auto *C : Constants)
-    C->handleOperandChange(this, New);
-}
-
 namespace {
 // Various metrics for how much to strip off of pointers.
 enum PointerStripKind {
   PSK_ZeroIndices,
   PSK_ZeroIndicesAndAliases,
-  PSK_ZeroIndicesAndAliasesAndBarriers,
+  PSK_ZeroIndicesAndAliasesAndInvariantGroups,
   PSK_InBoundsConstantIndices,
   PSK_InBounds
 };
@@ -509,7 +489,7 @@ static const Value *stripPointerCastsAndOffsets(const Value *V) {
     if (auto *GEP = dyn_cast<GEPOperator>(V)) {
       switch (StripKind) {
       case PSK_ZeroIndicesAndAliases:
-      case PSK_ZeroIndicesAndAliasesAndBarriers:
+      case PSK_ZeroIndicesAndAliasesAndInvariantGroups:
       case PSK_ZeroIndices:
         if (!GEP->hasAllZeroIndices())
           return V;
@@ -537,11 +517,12 @@ static const Value *stripPointerCastsAndOffsets(const Value *V) {
           V = RV;
           continue;
         }
-        // The result of invariant.group.barrier must alias it's argument,
+        // The result of launder.invariant.group must alias it's argument,
         // but it can't be marked with returned attribute, that's why it needs
         // special case.
-        if (StripKind == PSK_ZeroIndicesAndAliasesAndBarriers &&
-            CS.getIntrinsicID() == Intrinsic::invariant_group_barrier) {
+        if (StripKind == PSK_ZeroIndicesAndAliasesAndInvariantGroups &&
+            (CS.getIntrinsicID() == Intrinsic::launder_invariant_group ||
+             CS.getIntrinsicID() == Intrinsic::strip_invariant_group)) {
           V = CS.getArgOperand(0);
           continue;
         }
@@ -567,8 +548,8 @@ const Value *Value::stripInBoundsConstantOffsets() const {
   return stripPointerCastsAndOffsets<PSK_InBoundsConstantIndices>(this);
 }
 
-const Value *Value::stripPointerCastsAndBarriers() const {
-  return stripPointerCastsAndOffsets<PSK_ZeroIndicesAndAliasesAndBarriers>(
+const Value *Value::stripPointerCastsAndInvariantGroups() const {
+  return stripPointerCastsAndOffsets<PSK_ZeroIndicesAndAliasesAndInvariantGroups>(
       this);
 }
 
@@ -578,9 +559,9 @@ Value::stripAndAccumulateInBoundsConstantOffsets(const DataLayout &DL,
   if (!getType()->isPointerTy())
     return this;
 
-  assert(Offset.getBitWidth() == DL.getPointerSizeInBits(cast<PointerType>(
+  assert(Offset.getBitWidth() == DL.getIndexSizeInBits(cast<PointerType>(
                                      getType())->getAddressSpace()) &&
-         "The offset must have exactly as many bits as our pointer.");
+         "The offset bit width does not match the DL specification.");
 
   // Even though we don't look through PHI nodes, we could be called on an
   // instruction in an unreachable block, which may be on a cycle.
@@ -676,6 +657,10 @@ unsigned Value::getPointerAlignment(const DataLayout &DL) const {
 
   unsigned Align = 0;
   if (auto *GO = dyn_cast<GlobalObject>(this)) {
+    // Don't make any assumptions about function pointer alignment. Some
+    // targets use the LSBs to store additional information.
+    if (isa<Function>(GO))
+      return 0;
     Align = GO->getAlignment();
     if (Align == 0) {
       if (auto *GVar = dyn_cast<GlobalVariable>(GO)) {