Use the space freed up by sparc and zaurus to import LLVM.

ok hackroom@

4 files changed, 358 insertions, 0 deletions

diff --git a/gnu/llvm/unittests/Bitcode/BitReaderTest.cpp b/gnu/llvm/unittests/Bitcode/BitReaderTest.cpp
new file mode 100644
index 00000000000..420aca2443b
--- /dev/null
+++ b/gnu/llvm/unittests/Bitcode/BitReaderTest.cpp
@@ -0,0 +1,275 @@
+//===- llvm/unittest/Bitcode/BitReaderTest.cpp - Tests for BitReader ------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/AsmParser/Parser.h"
+#include "llvm/Bitcode/BitstreamReader.h"
+#include "llvm/Bitcode/BitstreamWriter.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/Verifier.h"
+#include "llvm/Support/DataStream.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/StreamingMemoryObject.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+
+namespace {
+
+std::unique_ptr<Module> parseAssembly(const char *Assembly) {
+  SMDiagnostic Error;
+  std::unique_ptr<Module> M =
+      parseAssemblyString(Assembly, Error, getGlobalContext());
+
+  std::string ErrMsg;
+  raw_string_ostream OS(ErrMsg);
+  Error.print("", OS);
+
+  // A failure here means that the test itself is buggy.
+  if (!M)
+    report_fatal_error(OS.str().c_str());
+
+  return M;
+}
+
+static void writeModuleToBuffer(std::unique_ptr<Module> Mod,
+                                SmallVectorImpl<char> &Buffer) {
+  raw_svector_ostream OS(Buffer);
+  WriteBitcodeToFile(Mod.get(), OS);
+}
+
+static std::unique_ptr<Module> getLazyModuleFromAssembly(LLVMContext &Context,
+                                                         SmallString<1024> &Mem,
+                                                         const char *Assembly) {
+  writeModuleToBuffer(parseAssembly(Assembly), Mem);
+  std::unique_ptr<MemoryBuffer> Buffer =
+      MemoryBuffer::getMemBuffer(Mem.str(), "test", false);
+  ErrorOr<std::unique_ptr<Module>> ModuleOrErr =
+      getLazyBitcodeModule(std::move(Buffer), Context);
+  return std::move(ModuleOrErr.get());
+}
+
+class BufferDataStreamer : public DataStreamer {
+  std::unique_ptr<MemoryBuffer> Buffer;
+  unsigned Pos = 0;
+  size_t GetBytes(unsigned char *Out, size_t Len) override {
+    StringRef Buf = Buffer->getBuffer();
+    size_t Left = Buf.size() - Pos;
+    Len = std::min(Left, Len);
+    memcpy(Out, Buffer->getBuffer().substr(Pos).data(), Len);
+    Pos += Len;
+    return Len;
+  }
+
+public:
+  BufferDataStreamer(std::unique_ptr<MemoryBuffer> Buffer)
+      : Buffer(std::move(Buffer)) {}
+};
+
+static std::unique_ptr<Module>
+getStreamedModuleFromAssembly(LLVMContext &Context, SmallString<1024> &Mem,
+                              const char *Assembly) {
+  writeModuleToBuffer(parseAssembly(Assembly), Mem);
+  std::unique_ptr<MemoryBuffer> Buffer =
+      MemoryBuffer::getMemBuffer(Mem.str(), "test", false);
+  auto Streamer = llvm::make_unique<BufferDataStreamer>(std::move(Buffer));
+  ErrorOr<std::unique_ptr<Module>> ModuleOrErr =
+      getStreamedBitcodeModule("test", std::move(Streamer), Context);
+  return std::move(ModuleOrErr.get());
+}
+
+// Checks if we correctly detect eof if we try to read N bits when there are not
+// enough bits left on the input stream to read N bits, and we are using a data
+// streamer. In particular, it checks if we properly set the object size when
+// the eof is reached under such conditions.
+TEST(BitReaderTest, TestForEofAfterReadFailureOnDataStreamer) {
+  // Note: Because StreamingMemoryObject does a call to method GetBytes in it's
+  // constructor, using internal constant kChunkSize, we must fill the input
+  // with more characters than that amount.
+  static size_t InputSize = StreamingMemoryObject::kChunkSize + 5;
+  char *Text = new char[InputSize];
+  std::memset(Text, 'a', InputSize);
+  Text[InputSize - 1] = '\0';
+  StringRef Input(Text);
+
+  // Build bitsteam reader using data streamer.
+  auto MemoryBuf = MemoryBuffer::getMemBuffer(Input);
+  std::unique_ptr<DataStreamer> Streamer(
+      new BufferDataStreamer(std::move(MemoryBuf)));
+  auto OwnedBytes =
+      llvm::make_unique<StreamingMemoryObject>(std::move(Streamer));
+  auto Reader = llvm::make_unique<BitstreamReader>(std::move(OwnedBytes));
+  BitstreamCursor Cursor;
+  Cursor.init(Reader.get());
+
+  // Jump to two bytes before end of stream.
+  Cursor.JumpToBit((InputSize - 4) * CHAR_BIT);
+  // Try to read 4 bytes when only 2 are present, resulting in error value 0.
+  const size_t ReadErrorValue = 0;
+  EXPECT_EQ(ReadErrorValue, Cursor.Read(32));
+  // Should be at eof now.
+  EXPECT_TRUE(Cursor.AtEndOfStream());
+
+  delete[] Text;
+}
+
+TEST(BitReaderTest, MateralizeForwardRefWithStream) {
+  SmallString<1024> Mem;
+
+  LLVMContext Context;
+  std::unique_ptr<Module> M = getStreamedModuleFromAssembly(
+      Context, Mem, "@table = constant i8* blockaddress(@func, %bb)\n"
+                    "define void @func() {\n"
+                    "  unreachable\n"
+                    "bb:\n"
+                    "  unreachable\n"
+                    "}\n");
+  EXPECT_FALSE(M->getFunction("func")->empty());
+}
+
+// Tests that lazy evaluation can parse functions out of order.
+TEST(BitReaderTest, MaterializeFunctionsOutOfOrder) {
+  SmallString<1024> Mem;
+  LLVMContext Context;
+  std::unique_ptr<Module> M = getLazyModuleFromAssembly(
+      Context, Mem, "define void @f() {\n"
+                    "  unreachable\n"
+                    "}\n"
+                    "define void @g() {\n"
+                    "  unreachable\n"
+                    "}\n"
+                    "define void @h() {\n"
+                    "  unreachable\n"
+                    "}\n"
+                    "define void @j() {\n"
+                    "  unreachable\n"
+                    "}\n");
+  EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+  Function *F = M->getFunction("f");
+  Function *G = M->getFunction("g");
+  Function *H = M->getFunction("h");
+  Function *J = M->getFunction("j");
+
+  // Initially all functions are not materialized (no basic blocks).
+  EXPECT_TRUE(F->empty());
+  EXPECT_TRUE(G->empty());
+  EXPECT_TRUE(H->empty());
+  EXPECT_TRUE(J->empty());
+  EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+  // Materialize h.
+  H->materialize();
+  EXPECT_TRUE(F->empty());
+  EXPECT_TRUE(G->empty());
+  EXPECT_FALSE(H->empty());
+  EXPECT_TRUE(J->empty());
+  EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+  // Materialize g.
+  G->materialize();
+  EXPECT_TRUE(F->empty());
+  EXPECT_FALSE(G->empty());
+  EXPECT_FALSE(H->empty());
+  EXPECT_TRUE(J->empty());
+  EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+  // Materialize j.
+  J->materialize();
+  EXPECT_TRUE(F->empty());
+  EXPECT_FALSE(G->empty());
+  EXPECT_FALSE(H->empty());
+  EXPECT_FALSE(J->empty());
+  EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+  // Materialize f.
+  F->materialize();
+  EXPECT_FALSE(F->empty());
+  EXPECT_FALSE(G->empty());
+  EXPECT_FALSE(H->empty());
+  EXPECT_FALSE(J->empty());
+  EXPECT_FALSE(verifyModule(*M, &dbgs()));
+}
+
+TEST(BitReaderTest, MaterializeFunctionsForBlockAddr) { // PR11677
+  SmallString<1024> Mem;
+
+  LLVMContext Context;
+  std::unique_ptr<Module> M = getLazyModuleFromAssembly(
+      Context, Mem, "@table = constant i8* blockaddress(@func, %bb)\n"
+                    "define void @func() {\n"
+                    "  unreachable\n"
+                    "bb:\n"
+                    "  unreachable\n"
+                    "}\n");
+  EXPECT_FALSE(verifyModule(*M, &dbgs()));
+}
+
+TEST(BitReaderTest, MaterializeFunctionsForBlockAddrInFunctionBefore) {
+  SmallString<1024> Mem;
+
+  LLVMContext Context;
+  std::unique_ptr<Module> M = getLazyModuleFromAssembly(
+      Context, Mem, "define i8* @before() {\n"
+                    "  ret i8* blockaddress(@func, %bb)\n"
+                    "}\n"
+                    "define void @other() {\n"
+                    "  unreachable\n"
+                    "}\n"
+                    "define void @func() {\n"
+                    "  unreachable\n"
+                    "bb:\n"
+                    "  unreachable\n"
+                    "}\n");
+  EXPECT_TRUE(M->getFunction("before")->empty());
+  EXPECT_TRUE(M->getFunction("func")->empty());
+  EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+  // Materialize @before, pulling in @func.
+  EXPECT_FALSE(M->getFunction("before")->materialize());
+  EXPECT_FALSE(M->getFunction("func")->empty());
+  EXPECT_TRUE(M->getFunction("other")->empty());
+  EXPECT_FALSE(verifyModule(*M, &dbgs()));
+}
+
+TEST(BitReaderTest, MaterializeFunctionsForBlockAddrInFunctionAfter) {
+  SmallString<1024> Mem;
+
+  LLVMContext Context;
+  std::unique_ptr<Module> M = getLazyModuleFromAssembly(
+      Context, Mem, "define void @func() {\n"
+                    "  unreachable\n"
+                    "bb:\n"
+                    "  unreachable\n"
+                    "}\n"
+                    "define void @other() {\n"
+                    "  unreachable\n"
+                    "}\n"
+                    "define i8* @after() {\n"
+                    "  ret i8* blockaddress(@func, %bb)\n"
+                    "}\n");
+  EXPECT_TRUE(M->getFunction("after")->empty());
+  EXPECT_TRUE(M->getFunction("func")->empty());
+  EXPECT_FALSE(verifyModule(*M, &dbgs()));
+
+  // Materialize @after, pulling in @func.
+  EXPECT_FALSE(M->getFunction("after")->materialize());
+  EXPECT_FALSE(M->getFunction("func")->empty());
+  EXPECT_TRUE(M->getFunction("other")->empty());
+  EXPECT_FALSE(verifyModule(*M, &dbgs()));
+}
+
+} // end namespace
diff --git a/gnu/llvm/unittests/Bitcode/BitstreamReaderTest.cpp b/gnu/llvm/unittests/Bitcode/BitstreamReaderTest.cpp
new file mode 100644
index 00000000000..b11d7fde774
--- /dev/null
+++ b/gnu/llvm/unittests/Bitcode/BitstreamReaderTest.cpp
@@ -0,0 +1,56 @@
+//===- BitstreamReaderTest.cpp - Tests for BitstreamReader ----------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Bitcode/BitstreamReader.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+
+namespace {
+
+TEST(BitstreamReaderTest, AtEndOfStream) {
+  uint8_t Bytes[4] = {
+    0x00, 0x01, 0x02, 0x03
+  };
+  BitstreamReader Reader(std::begin(Bytes), std::end(Bytes));
+  BitstreamCursor Cursor(Reader);
+
+  EXPECT_FALSE(Cursor.AtEndOfStream());
+  (void)Cursor.Read(8);
+  EXPECT_FALSE(Cursor.AtEndOfStream());
+  (void)Cursor.Read(24);
+  EXPECT_TRUE(Cursor.AtEndOfStream());
+
+  Cursor.JumpToBit(0);
+  EXPECT_FALSE(Cursor.AtEndOfStream());
+
+  Cursor.JumpToBit(32);
+  EXPECT_TRUE(Cursor.AtEndOfStream());
+}
+
+TEST(BitstreamReaderTest, AtEndOfStreamJump) {
+  uint8_t Bytes[4] = {
+    0x00, 0x01, 0x02, 0x03
+  };
+  BitstreamReader Reader(std::begin(Bytes), std::end(Bytes));
+  BitstreamCursor Cursor(Reader);
+
+  Cursor.JumpToBit(32);
+  EXPECT_TRUE(Cursor.AtEndOfStream());
+}
+
+TEST(BitstreamReaderTest, AtEndOfStreamEmpty) {
+  uint8_t Dummy = 0xFF;
+  BitstreamReader Reader(&Dummy, &Dummy);
+  BitstreamCursor Cursor(Reader);
+
+  EXPECT_TRUE(Cursor.AtEndOfStream());
+}
+
+} // end anonymous namespace
diff --git a/gnu/llvm/unittests/Bitcode/CMakeLists.txt b/gnu/llvm/unittests/Bitcode/CMakeLists.txt
new file mode 100644
index 00000000000..09cbcdc7284
--- /dev/null
+++ b/gnu/llvm/unittests/Bitcode/CMakeLists.txt
@@ -0,0 +1,12 @@
+set(LLVM_LINK_COMPONENTS
+  AsmParser
+  BitReader
+  BitWriter
+  Core
+  Support
+  )
+
+add_llvm_unittest(BitcodeTests
+  BitReaderTest.cpp
+  BitstreamReaderTest.cpp
+  )
diff --git a/gnu/llvm/unittests/Bitcode/Makefile b/gnu/llvm/unittests/Bitcode/Makefile
new file mode 100644
index 00000000000..33b09b914b5
--- /dev/null
+++ b/gnu/llvm/unittests/Bitcode/Makefile
@@ -0,0 +1,15 @@
+##===- unittests/Bitcode/Makefile --------------------------*- Makefile -*-===##
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+LEVEL = ../..
+TESTNAME = Bitcode
+LINK_COMPONENTS := AsmParser BitReader BitWriter Core Support
+
+include $(LEVEL)/Makefile.config
+include $(LLVM_SRC_ROOT)/unittests/Makefile.unittest