Fix ptr vector inconsistency in CreatePointerCast

One form would accept a vector of pointers, and the other did not.
Make both accept vectors of pointers, and add an assertion
for the number of elements.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187464 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 24 insertions, 5 deletions

diff --git a/lib/IR/Instructions.cpp b/lib/IR/Instructions.cpp
index 49a9e8c..d88fb6d 100644
--- a/lib/IR/Instructions.cpp
+++ b/lib/IR/Instructions.cpp
@@ -2415,22 +2415,30 @@ CastInst *CastInst::CreateTruncOrBitCast(Value *S, Type *Ty,
 CastInst *CastInst::CreatePointerCast(Value *S, Type *Ty,
                                       const Twine &Name,
                                       BasicBlock *InsertAtEnd) {
-  assert(S->getType()->isPointerTy() && "Invalid cast");
-  assert((Ty->isIntegerTy() || Ty->isPointerTy()) &&
+  assert(S->getType()->isPtrOrPtrVectorTy() && "Invalid cast");
+  assert((Ty->isIntOrIntVectorTy() || Ty->isPtrOrPtrVectorTy()) &&
+         "Invalid cast");
+  assert(Ty->isVectorTy() == S->getType()->isVectorTy() && "Invalid cast");
+  assert(!Ty->isVectorTy() ||
+         Ty->getVectorNumElements() == S->getType()->getVectorNumElements() &&
          "Invalid cast");
 
-  if (Ty->isIntegerTy())
+  if (Ty->isIntOrIntVectorTy())
     return Create(Instruction::PtrToInt, S, Ty, Name, InsertAtEnd);
   return Create(Instruction::BitCast, S, Ty, Name, InsertAtEnd);
 }
 
 /// @brief Create a BitCast or a PtrToInt cast instruction
-CastInst *CastInst::CreatePointerCast(Value *S, Type *Ty, 
-                                      const Twine &Name, 
+CastInst *CastInst::CreatePointerCast(Value *S, Type *Ty,
+                                      const Twine &Name,
                                       Instruction *InsertBefore) {
   assert(S->getType()->isPtrOrPtrVectorTy() && "Invalid cast");
   assert((Ty->isIntOrIntVectorTy() || Ty->isPtrOrPtrVectorTy()) &&
          "Invalid cast");
+  assert(Ty->isVectorTy() == S->getType()->isVectorTy() && "Invalid cast");
+  assert(!Ty->isVectorTy() ||
+         Ty->getVectorNumElements() == S->getType()->getVectorNumElements() &&
+         "Invalid cast");
 
   if (Ty->isIntOrIntVectorTy())
     return Create(Instruction::PtrToInt, S, Ty, Name, InsertBefore);
diff --git a/unittests/IR/InstructionsTest.cpp b/unittests/IR/InstructionsTest.cpp
index c2fdceb..ce6c465 100644
--- a/unittests/IR/InstructionsTest.cpp
+++ b/unittests/IR/InstructionsTest.cpp
@@ -197,6 +197,17 @@ TEST(InstructionsTest, CastInst) {
   EXPECT_TRUE(CastInst::isBitCastable(V2Int32PtrTy, V2Int64PtrTy));
   EXPECT_FALSE(CastInst::isBitCastable(V2Int32Ty, V2Int64Ty));
   EXPECT_FALSE(CastInst::isBitCastable(V2Int64Ty, V2Int32Ty));
+
+
+  // Check that assertion is not hit when creating a cast with a vector of
+  // pointers
+  // First form
+  BasicBlock *BB = BasicBlock::Create(C);
+  Constant *NullV2I32Ptr = Constant::getNullValue(V2Int32PtrTy);
+  CastInst::CreatePointerCast(NullV2I32Ptr, V2Int32Ty, "foo", BB);
+
+  // Second form
+  CastInst::CreatePointerCast(NullV2I32Ptr, V2Int32Ty);
 }
 
 TEST(InstructionsTest, VectorGep) {