From: David Blaikie <dblaikie@gmail.com>
Date: Wed, 29 Apr 2015 23:00:35 +0000 (+0000)
Subject: [opaque pointer type] Store the value type of an alloca
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=commitdiff_plain;h=3453e8bfe13969aa47b98c32a477e25a4f1f07e3

[opaque pointer type] Store the value type of an alloca

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236175 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/IR/Instructions.h b/include/llvm/IR/Instructions.h
index 7c60945fad6..6db34038083 100644
--- a/include/llvm/IR/Instructions.h
+++ b/include/llvm/IR/Instructions.h
@@ -73,6 +73,8 @@ return (Ord == Release ||
 /// AllocaInst - an instruction to allocate memory on the stack
 ///
 class AllocaInst : public UnaryInstruction {
+  Type *AllocatedType;
+
 protected:
   AllocaInst *clone_impl() const override;
 public:
@@ -113,7 +115,10 @@ public:
   /// getAllocatedType - Return the type that is being allocated by the
   /// instruction.
   ///
-  Type *getAllocatedType() const;
+  Type *getAllocatedType() const { return AllocatedType; }
+  /// \brief for use only in special circumstances that need to generically
+  /// transform a whole instruction (eg: IR linking and vectorization).
+  void setAllocatedType(Type *Ty) { AllocatedType = Ty; }
 
   /// getAlignment - Return the alignment of the memory that is being allocated
   /// by the instruction.
diff --git a/lib/IR/Instructions.cpp b/lib/IR/Instructions.cpp
index aa878ea436e..e46db2c4850 100644
--- a/lib/IR/Instructions.cpp
+++ b/lib/IR/Instructions.cpp
@@ -864,8 +864,9 @@ AllocaInst::AllocaInst(Type *Ty, Value *ArraySize, const Twine &Name,
 
 AllocaInst::AllocaInst(Type *Ty, Value *ArraySize, unsigned Align,
                        const Twine &Name, Instruction *InsertBefore)
-  : UnaryInstruction(PointerType::getUnqual(Ty), Alloca,
-                     getAISize(Ty->getContext(), ArraySize), InsertBefore) {
+    : UnaryInstruction(PointerType::getUnqual(Ty), Alloca,
+                       getAISize(Ty->getContext(), ArraySize), InsertBefore),
+      AllocatedType(Ty) {
   setAlignment(Align);
   assert(!Ty->isVoidTy() && "Cannot allocate void!");
   setName(Name);
@@ -873,8 +874,9 @@ AllocaInst::AllocaInst(Type *Ty, Value *ArraySize, unsigned Align,
 
 AllocaInst::AllocaInst(Type *Ty, Value *ArraySize, unsigned Align,
                        const Twine &Name, BasicBlock *InsertAtEnd)
-  : UnaryInstruction(PointerType::getUnqual(Ty), Alloca,
-                     getAISize(Ty->getContext(), ArraySize), InsertAtEnd) {
+    : UnaryInstruction(PointerType::getUnqual(Ty), Alloca,
+                       getAISize(Ty->getContext(), ArraySize), InsertAtEnd),
+      AllocatedType(Ty) {
   setAlignment(Align);
   assert(!Ty->isVoidTy() && "Cannot allocate void!");
   setName(Name);
@@ -899,10 +901,6 @@ bool AllocaInst::isArrayAllocation() const {
   return true;
 }
 
-Type *AllocaInst::getAllocatedType() const {
-  return getType()->getElementType();
-}
-
 /// isStaticAlloca - Return true if this alloca is in the entry block of the
 /// function and is a constant size.  If so, the code generator will fold it
 /// into the prolog/epilog code, so it is basically free.
diff --git a/lib/Transforms/Utils/ValueMapper.cpp b/lib/Transforms/Utils/ValueMapper.cpp
index f396b42dabe..5c1518d72ac 100644
--- a/lib/Transforms/Utils/ValueMapper.cpp
+++ b/lib/Transforms/Utils/ValueMapper.cpp
@@ -396,6 +396,9 @@ void llvm::RemapInstruction(Instruction *I, ValueToValueMapTy &VMap,
       Tys.push_back(TypeMapper->remapType(Ty));
     CS.mutateFunctionType(FunctionType::get(
         TypeMapper->remapType(I->getType()), Tys, FTy->isVarArg()));
-  } else
-    I->mutateType(TypeMapper->remapType(I->getType()));
+    return;
+  }
+  if (auto *AI = dyn_cast<AllocaInst>(I))
+    AI->setAllocatedType(TypeMapper->remapType(AI->getAllocatedType()));
+  I->mutateType(TypeMapper->remapType(I->getType()));
 }