IRGen: remove TypeInfo::allocateVector

It's not needed anymore because the alloc_vector instruction is removed.

Author: eeckstein

lib/IRGen/FixedTypeInfo.h

@@ -83,8 +83,6 @@ class FixedTypeInfo : public TypeInfo {
 
   StackAddress allocateStack(IRGenFunction &IGF, SILType T,
                              const llvm::Twine &name) const override;
-  StackAddress allocateVector(IRGenFunction &IGF, SILType T,
-                              llvm::Value *capacity, const Twine &name) const override;
   void deallocateStack(IRGenFunction &IGF, StackAddress addr, SILType T) const override;
   void destroyStack(IRGenFunction &IGF, StackAddress addr, SILType T,
                     bool isOutlined) const override;

lib/IRGen/GenArray.cpp

@@ -625,12 +625,6 @@ class NonFixedArrayTypeInfo final
     return alloca.withAddress(getAddressForPointer(alloca.getAddressPointer()));
   }
 
-  StackAddress allocateVector(IRGenFunction &IGF, SILType T,
-                              llvm::Value *capacity,
-                              const Twine &name) const override {
-    llvm_unreachable("not implemented, yet");
-  }
-
   void deallocateStack(IRGenFunction &IGF, StackAddress stackAddress,
                        SILType T) const override {
     IGF.Builder.CreateLifetimeEnd(stackAddress.getAddress().getAddress());

lib/IRGen/GenInit.cpp

@@ -74,23 +74,6 @@ StackAddress FixedTypeInfo::allocateStack(IRGenFunction &IGF, SILType T,
   return { alloca };
 }
 
-StackAddress FixedTypeInfo::allocateVector(IRGenFunction &IGF, SILType T,
-                                           llvm::Value *capacity,
-                                           const Twine &name) const {
-  // If the type is known to be empty, don't actually allocate anything.
-  if (isKnownEmpty(ResilienceExpansion::Maximal)) {
-    auto addr = getUndefAddress();
-    return { addr };
-  }
-
-  StackAddress alloca =
-    IGF.emitDynamicAlloca(getStorageType(), capacity, getFixedAlignment(),
-                          /*allowTaskAlloc*/ true, name);
-  IGF.Builder.CreateLifetimeStart(alloca.getAddress(), getFixedSize());
-
-  return { alloca };
-}
-
 void FixedTypeInfo::destroyStack(IRGenFunction &IGF, StackAddress addr,
                                  SILType T, bool isOutlined) const {
   destroy(IGF, addr.getAddress(), T, isOutlined);

lib/IRGen/GenType.cpp

@@ -1378,11 +1378,6 @@ namespace {
                                const llvm::Twine &name) const override {
       llvm_unreachable("should not call on an immovable opaque type");
     }
-    StackAddress allocateVector(IRGenFunction &IGF, SILType T,
-                                llvm::Value *capacity,
-                                const Twine &name) const override {
-      llvm_unreachable("should not call on an immovable opaque type");
-    }
     void deallocateStack(IRGenFunction &IGF, StackAddress addr,
                          SILType T) const override {
       llvm_unreachable("should not call on an immovable opaque type");

lib/IRGen/NonFixedTypeInfo.h

@@ -72,12 +72,6 @@ class WitnessSizedTypeInfo : public IndirectTypeInfo<Impl, TypeInfo> {
              getAsBitCastAddress(IGF, alloca.getAddressPointer()));
   }
 
-  StackAddress allocateVector(IRGenFunction &IGF, SILType T,
-                              llvm::Value *capacity,
-                              const Twine &name) const override {
-    llvm_unreachable("not implemented, yet");
-  }
-
   void deallocateStack(IRGenFunction &IGF, StackAddress stackAddress,
                        SILType T) const override {
     IGF.Builder.CreateLifetimeEnd(stackAddress.getAddress().getAddress());

lib/IRGen/TypeInfo.h

@@ -357,9 +357,6 @@ class TypeInfo {
   virtual StackAddress allocateStack(IRGenFunction &IGF, SILType T,
                                      const llvm::Twine &name) const = 0;
 
-  virtual StackAddress allocateVector(IRGenFunction &IGF, SILType T,
-                                      llvm::Value *capacity,
-                                      const Twine &name) const = 0;
   /// Deallocate a variable of this type.
   virtual void deallocateStack(IRGenFunction &IGF, StackAddress addr,
                                SILType T) const = 0;