Land the long talked about "type system rewrite" patch. This

patch brings numerous advantages to LLVM.  One way to look at it
is through diffstat:
 109 files changed, 3005 insertions(+), 5906 deletions(-)

Removing almost 3K lines of code is a good thing.  Other advantages
include:

1. Value::getType() is a simple load that can be CSE'd, not a mutating
   union-find operation.
2. Types a uniqued and never move once created, defining away PATypeHolder.
3. Structs can be "named" now, and their name is part of the identity that
   uniques them.  This means that the compiler doesn't merge them structurally
   which makes the IR much less confusing.
4. Now that there is no way to get a cycle in a type graph without a named
   struct type, "upreferences" go away.
5. Type refinement is completely gone, which should make LTO much MUCH faster
   in some common cases with C++ code.
6. Types are now generally immutable, so we can use "Type *" instead 
   "const Type *" everywhere.

Downsides of this patch are that it removes some functions from the C API,
so people using those will have to upgrade to (not yet added) new API.  
"LLVM 3.0" is the right time to do this.

There are still some cleanups pending after this, this patch is large enough
as-is.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134829 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 0 insertions, 89 deletions

diff --git a/unittests/CMakeLists.txt b/unittests/CMakeLists.txt
index 0d17c40c00..81d702981f 100644
--- a/unittests/CMakeLists.txt
+++ b/unittests/CMakeLists.txt
@@ -106,7 +106,6 @@ add_llvm_unittest(Transforms/Utils
 
 set(VMCoreSources
   VMCore/ConstantsTest.cpp
-  VMCore/DerivedTypesTest.cpp
   VMCore/InstructionsTest.cpp
   VMCore/MetadataTest.cpp
   VMCore/PassManagerTest.cpp
diff --git a/unittests/VMCore/DerivedTypesTest.cpp b/unittests/VMCore/DerivedTypesTest.cpp
deleted file mode 100644
index d0ba0264aa..0000000000
--- a/unittests/VMCore/DerivedTypesTest.cpp
+++ /dev/null
@@ -1,88 +0,0 @@
-//===- llvm/unittest/VMCore/DerivedTypesTest.cpp - Types unit tests -------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "gtest/gtest.h"
-#include "../lib/VMCore/LLVMContextImpl.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/LLVMContext.h"
-#include "llvm/Constants.h"
-#include "llvm/Support/ValueHandle.h"
-using namespace llvm;
-
-namespace {
-
-static void PR7658() {
-  LLVMContext ctx;
-
-  WeakVH NullPtr;
-  PATypeHolder h1;
-  {
-    OpaqueType *o1 = OpaqueType::get(ctx);
-    PointerType *p1 = PointerType::get(o1, 0);
-
-    std::vector<const Type *> t1;
-    t1.push_back(IntegerType::get(ctx, 32));
-    t1.push_back(p1);
-    NullPtr = ConstantPointerNull::get(p1);
-    OpaqueType *o2 = OpaqueType::get (ctx);
-    PointerType *p2 = PointerType::get (o2, 0);
-    t1.push_back(p2);
-
-
-    StructType *s1 = StructType::get(ctx, t1);
-    h1 = s1;
-    o1->refineAbstractTypeTo(s1);
-    o2->refineAbstractTypeTo(h1.get());  // h1 = { i32, \2*, \2* }
-  }
-
-
-  OpaqueType *o3 = OpaqueType::get(ctx);
-  PointerType *p3 = PointerType::get(o3, 0);  // p3 = opaque*
-
-  std::vector<const Type *> t2;
-  t2.push_back(IntegerType::get(ctx, 32));
-  t2.push_back(p3);
-
-  std::vector<Constant *> v2;
-  v2.push_back(ConstantInt::get(IntegerType::get(ctx, 32), 14));
-  v2.push_back(ConstantPointerNull::get(p3));
-
-  OpaqueType *o4 = OpaqueType::get(ctx);
-  {
-    PointerType *p4 = PointerType::get(o4, 0);
-    t2.push_back(p4);
-    v2.push_back(ConstantPointerNull::get(p4));
-  }
-
-  WeakVH CS = ConstantStruct::getAnon(ctx, v2, false); // { i32 14, opaque* null, opaque* null}
-
-  StructType *s2 = StructType::get(ctx, t2);
-  PATypeHolder h2(s2);
-  o3->refineAbstractTypeTo(s2);
-  o4->refineAbstractTypeTo(h2.get());
-}
-
-
-TEST(OpaqueTypeTest, RegisterWithContext) {
-  LLVMContext C;
-  LLVMContextImpl *pImpl = C.pImpl;
-
-  // 1 refers to the AlwaysOpaqueTy allocated in the Context's constructor and
-  // destroyed in the destructor.
-  EXPECT_EQ(1u, pImpl->OpaqueTypes.size());
-  {
-    PATypeHolder Type = OpaqueType::get(C);
-    EXPECT_EQ(2u, pImpl->OpaqueTypes.size());
-  }
-  EXPECT_EQ(1u, pImpl->OpaqueTypes.size());
-
-  PR7658();
-}
-
-}  // namespace