Vendor import of llvm release_30 branch r142614:

http://llvm.org/svn/llvm-project/llvm/branches/release_30@142614

1 files changed, 4 insertions, 3 deletions

diff --git a/lib/Support/raw_ostream.cpp b/lib/Support/raw_ostream.cpp
index 5a71fa3..4927e9a 100644
--- a/lib/Support/raw_ostream.cpp
+++ b/lib/Support/raw_ostream.cpp
@@ -84,7 +84,7 @@ void raw_ostream::SetBuffered() {
 }
 
 void raw_ostream::SetBufferAndMode(char *BufferStart, size_t Size,
-                                    BufferKind Mode) {
+                                   BufferKind Mode) {
   assert(((Mode == Unbuffered && BufferStart == 0 && Size == 0) ||
           (Mode != Unbuffered && BufferStart && Size)) &&
          "stream must be unbuffered or have at least one byte");
@@ -121,7 +121,8 @@ raw_ostream &raw_ostream::operator<<(unsigned long N) {
 raw_ostream &raw_ostream::operator<<(long N) {
   if (N <  0) {
     *this << '-';
-    N = -N;
+    // Avoid undefined behavior on LONG_MIN with a cast.
+    N = -(unsigned long)N;
   }
 
   return this->operator<<(static_cast<unsigned long>(N));
@@ -284,7 +285,7 @@ raw_ostream &raw_ostream::write(unsigned char C) {
 
 raw_ostream &raw_ostream::write(const char *Ptr, size_t Size) {
   // Group exceptional cases into a single branch.
-  if (BUILTIN_EXPECT(OutBufCur+Size > OutBufEnd, false)) {
+  if (BUILTIN_EXPECT(size_t(OutBufEnd - OutBufCur) < Size, false)) {
     if (BUILTIN_EXPECT(!OutBufStart, false)) {
       if (BufferMode == Unbuffered) {
         write_impl(Ptr, Size);