Revert "MemoryBuffer: Add a missing error-check to getOpenFileImpl"

This reverts commit r368977 because it broke a couple of tests in lldb.

llvm-svn: 369027

2 files changed, 1 insertions, 54 deletions

diff --git a/llvm/lib/Support/MemoryBuffer.cpp b/llvm/lib/Support/MemoryBuffer.cpp
index 2f31f059ddb..d0e5bb154c1 100644
--- a/llvm/lib/Support/MemoryBuffer.cpp
+++ b/llvm/lib/Support/MemoryBuffer.cpp
@@ -458,9 +458,7 @@ getOpenFileImpl(sys::fs::file_t FD, const Twine &Filename, uint64_t FileSize,
     return make_error_code(errc::not_enough_memory);
   }
 
-  if (std::error_code EC =
-          sys::fs::readNativeFileSlice(FD, Buf->getBuffer(), Offset))
-    return EC;
+  sys::fs::readNativeFileSlice(FD, Buf->getBuffer(), Offset);
 
   return std::move(Buf);
 }
diff --git a/llvm/unittests/Support/MemoryBufferTest.cpp b/llvm/unittests/Support/MemoryBufferTest.cpp
index 629b94d7843..2f9664308dc 100644
--- a/llvm/unittests/Support/MemoryBufferTest.cpp
+++ b/llvm/unittests/Support/MemoryBufferTest.cpp
@@ -11,7 +11,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/MemoryBuffer.h"
-#include "llvm/ADT/ScopeExit.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/FileUtilities.h"
 #include "llvm/Support/raw_ostream.h"
@@ -20,25 +19,6 @@
 
 using namespace llvm;
 
-#define ASSERT_NO_ERROR(x)                                                     \
-  if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
-    SmallString<128> MessageStorage;                                           \
-    raw_svector_ostream Message(MessageStorage);                               \
-    Message << #x ": did not return errc::success.\n"                          \
-            << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"          \
-            << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";      \
-    GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \
-  } else {                                                                     \
-  }
-
-#define ASSERT_ERROR(x)                                                        \
-  if (!x) {                                                                    \
-    SmallString<128> MessageStorage;                                           \
-    raw_svector_ostream Message(MessageStorage);                               \
-    Message << #x ": did not return a failure error code.\n";                  \
-    GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \
-  }
-
 namespace {
 
 class MemoryBufferTest : public testing::Test {
@@ -85,37 +65,6 @@ TEST_F(MemoryBufferTest, get) {
   EXPECT_EQ("this is some data", data);
 }
 
-TEST_F(MemoryBufferTest, getOpenFile) {
-  int FD;
-  SmallString<64> TestPath;
-  ASSERT_EQ(sys::fs::createTemporaryFile("MemoryBufferTest_getOpenFile", "temp",
-                                         FD, TestPath),
-            std::error_code());
-
-  FileRemover Cleanup(TestPath);
-  raw_fd_ostream OF(FD, /*shouldClose*/ true);
-  OF << "12345678";
-  OF.close();
-
-  {
-    Expected<sys::fs::file_t> File = sys::fs::openNativeFileForRead(TestPath);
-    ASSERT_THAT_EXPECTED(File, Succeeded());
-    auto OnExit =
-        make_scope_exit([&] { ASSERT_NO_ERROR(sys::fs::closeFile(*File)); });
-    ErrorOr<OwningBuffer> MB = MemoryBuffer::getOpenFile(*File, TestPath, 6);
-    ASSERT_NO_ERROR(MB.getError());
-    EXPECT_EQ("123456", MB.get()->getBuffer());
-  }
-  {
-    Expected<sys::fs::file_t> File = sys::fs::openNativeFileForWrite(
-        TestPath, sys::fs::CD_OpenExisting, sys::fs::OF_None);
-    ASSERT_THAT_EXPECTED(File, Succeeded());
-    auto OnExit =
-        make_scope_exit([&] { ASSERT_NO_ERROR(sys::fs::closeFile(*File)); });
-    ASSERT_ERROR(MemoryBuffer::getOpenFile(*File, TestPath, 6).getError());
-  }
-}
-
 TEST_F(MemoryBufferTest, NullTerminator4K) {
   // Test that a file with size that is a multiple of the page size can be null
   // terminated correctly by MemoryBuffer.