MemoryBuffer now return an error_code and returns a OwningPtr<MemoryBuffer> via an out parm.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121958 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 18 insertions, 16 deletions

diff --git a/utils/FileCheck/FileCheck.cpp b/utils/FileCheck/FileCheck.cpp
index b8c14f0..a4aa693 100644
--- a/utils/FileCheck/FileCheck.cpp
+++ b/utils/FileCheck/FileCheck.cpp
@@ -16,6 +16,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/ADT/OwningPtr.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/PrettyStackTrace.h"
@@ -489,13 +490,14 @@ static MemoryBuffer *CanonicalizeInputFile(MemoryBuffer *MB) {
 static bool ReadCheckFile(SourceMgr &SM,
                           std::vector<CheckString> &CheckStrings) {
   // Open the check file, and tell SourceMgr about it.
-  error_code ec;
-  MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(CheckFilename.c_str(), ec);
-  if (F == 0) {
+  OwningPtr<MemoryBuffer> File;
+  if (error_code ec =
+        MemoryBuffer::getFileOrSTDIN(CheckFilename.c_str(), File)) {
     errs() << "Could not open check file '" << CheckFilename << "': "
            << ec.message() << '\n';
     return true;
   }
+  MemoryBuffer *F = File.take();
 
   // If we want to canonicalize whitespace, strip excess whitespace from the
   // buffer containing the CHECK lines.
@@ -648,13 +650,14 @@ int main(int argc, char **argv) {
     return 2;
 
   // Open the file to check and add it to SourceMgr.
-  error_code ec;
-  MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(InputFilename.c_str(), ec);
-  if (F == 0) {
+  OwningPtr<MemoryBuffer> File;
+  if (error_code ec =
+        MemoryBuffer::getFileOrSTDIN(InputFilename.c_str(), File)) {
     errs() << "Could not open input file '" << InputFilename << "': "
            << ec.message() << '\n';
     return true;
   }
+  MemoryBuffer *F = File.take();
 
   // Remove duplicate spaces in the input file if requested.
   if (!NoCanonicalizeWhiteSpace)
diff --git a/utils/FileUpdate/FileUpdate.cpp b/utils/FileUpdate/FileUpdate.cpp
index 3514d0f..3ea1e4f 100644
--- a/utils/FileUpdate/FileUpdate.cpp
+++ b/utils/FileUpdate/FileUpdate.cpp
@@ -15,6 +15,7 @@
 
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/MemoryBuffer.h"
+#include "llvm/ADT/OwningPtr.h"
 #include "llvm/Support/PrettyStackTrace.h"
 #include "llvm/Support/ToolOutputFile.h"
 #include "llvm/Support/Signals.h"
@@ -43,17 +44,16 @@ int main(int argc, char **argv) {
   }
 
   // Get the input data.
-  error_code ec;
-  MemoryBuffer *In =
-    MemoryBuffer::getFileOrSTDIN(InputFilename.c_str(), ec);
-  if (In == 0) {
+  OwningPtr<MemoryBuffer> In;
+  if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputFilename.c_str(), In)) {
     errs() << argv[0] << ": error: Unable to get input '"
            << InputFilename << "': " << ec.message() << '\n';
     return 1;
   }
 
   // Get the output data.
-  MemoryBuffer *Out = MemoryBuffer::getFile(OutputFilename.c_str(), ec);
+  OwningPtr<MemoryBuffer> Out;
+  MemoryBuffer::getFile(OutputFilename.c_str(), Out);
 
   // If the output exists and the contents match, we are done.
   if (Out && In->getBufferSize() == Out->getBufferSize() &&
@@ -65,8 +65,6 @@ int main(int argc, char **argv) {
     return 0;
   }
 
-  delete Out;
-
   // Otherwise, overwrite the output.
   if (!Quiet)
     errs() << argv[0] << ": Updating '" << OutputFilename
diff --git a/utils/TableGen/TableGen.cpp b/utils/TableGen/TableGen.cpp
index f206d2b..61a8141 100644
--- a/utils/TableGen/TableGen.cpp
+++ b/utils/TableGen/TableGen.cpp
@@ -37,6 +37,7 @@
 #include "ARMDecoderEmitter.h"
 #include "SubtargetEmitter.h"
 #include "TGParser.h"
+#include "llvm/ADT/OwningPtr.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/PrettyStackTrace.h"
@@ -190,13 +191,13 @@ static bool ParseFile(const std::string &Filename,
                       const std::vector<std::string> &IncludeDirs,
                       SourceMgr &SrcMgr,
                       RecordKeeper &Records) {
-  error_code ec;
-  MemoryBuffer *F = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), ec);
-  if (F == 0) {
+  OwningPtr<MemoryBuffer> File;
+  if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename.c_str(), File)) {
     errs() << "Could not open input file '" << Filename << "': "
            << ec.message() <<"\n";
     return true;
   }
+  MemoryBuffer *F = File.take();
 
   // Tell SrcMgr about this buffer, which is what TGParser will pick up.
   SrcMgr.AddNewSourceBuffer(F, SMLoc());