Update LLVM to r104832.

8 files changed, 102 insertions, 22 deletions

diff --git a/lib/Support/APInt.cpp b/lib/Support/APInt.cpp
index 50025d2..1341d21 100644
--- a/lib/Support/APInt.cpp
+++ b/lib/Support/APInt.cpp
@@ -1382,13 +1382,12 @@ APInt APInt::sqrt() const {
   // libc sqrt function which will probably use a hardware sqrt computation.
   // This should be faster than the algorithm below.
   if (magnitude < 52) {
-#if defined( _MSC_VER ) || defined(_MINIX)
-    // Amazingly, VC++ and Minix don't have round().
+#if HAVE_ROUND
     return APInt(BitWidth,
-                 uint64_t(::sqrt(double(isSingleWord()?VAL:pVal[0]))) + 0.5);
+                 uint64_t(::round(::sqrt(double(isSingleWord()?VAL:pVal[0])))));
 #else
     return APInt(BitWidth,
-                 uint64_t(::round(::sqrt(double(isSingleWord()?VAL:pVal[0])))));
+                 uint64_t(::sqrt(double(isSingleWord()?VAL:pVal[0]))) + 0.5);
 #endif
   }
 
diff --git a/lib/Support/CommandLine.cpp b/lib/Support/CommandLine.cpp
index d31f34e..ae66110 100644
--- a/lib/Support/CommandLine.cpp
+++ b/lib/Support/CommandLine.cpp
@@ -1170,7 +1170,9 @@ public:
     std::string CPU = sys::getHostCPUName();
     if (CPU == "generic") CPU = "(unknown)";
     OS << ".\n"
+#if (ENABLE_TIMESTAMPS == 1)
        << "  Built " << __DATE__ << " (" << __TIME__ << ").\n"
+#endif
        << "  Host: " << sys::getHostTriple() << '\n'
        << "  Host CPU: " << CPU << '\n'
        << '\n'
diff --git a/lib/Support/ErrorHandling.cpp b/lib/Support/ErrorHandling.cpp
index 56a171c..7e7ca9d 100644
--- a/lib/Support/ErrorHandling.cpp
+++ b/lib/Support/ErrorHandling.cpp
@@ -16,6 +16,7 @@
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"
+#include "llvm/System/Signals.h"
 #include "llvm/System/Threading.h"
 #include <cassert>
 #include <cstdlib>
@@ -52,6 +53,12 @@ void llvm::report_fatal_error(const Twine &reason) {
   } else {
     ErrorHandler(ErrorHandlerUserData, reason.str());
   }
+
+  // If we reached here, we are failing ungracefully. Run the interrupt handlers
+  // to make sure any special cleanups get done, in particular that we remove
+  // files registered with RemoveFileOnSignal.
+  sys::RunInterruptHandlers();
+
   exit(1);
 }
 
diff --git a/lib/Support/PrettyStackTrace.cpp b/lib/Support/PrettyStackTrace.cpp
index 68b41a7..7a04a53 100644
--- a/lib/Support/PrettyStackTrace.cpp
+++ b/lib/Support/PrettyStackTrace.cpp
@@ -50,8 +50,8 @@ static void PrintCurStackTrace(raw_ostream &OS) {
 
 // Integrate with crash reporter.
 #ifdef __APPLE__
-extern "C" const char *__crashreporter_info__;
-const char *__crashreporter_info__ = 0;
+static const char *__crashreporter_info__ = 0;
+asm(".desc ___crashreporter_info__, 0x10");
 #endif
 
 
diff --git a/lib/Support/StringRef.cpp b/lib/Support/StringRef.cpp
index 2b262dc..ca0f518 100644
--- a/lib/Support/StringRef.cpp
+++ b/lib/Support/StringRef.cpp
@@ -23,6 +23,10 @@ static char ascii_tolower(char x) {
   return x;
 }
 
+static bool ascii_isdigit(char x) {
+  return x >= '0' && x <= '9';
+}
+
 /// compare_lower - Compare strings, ignoring case.
 int StringRef::compare_lower(StringRef RHS) const {
   for (size_t I = 0, E = min(Length, RHS.Length); I != E; ++I) {
@@ -37,6 +41,30 @@ int StringRef::compare_lower(StringRef RHS) const {
   return Length < RHS.Length ? -1 : 1;
 }
 
+/// compare_numeric - Compare strings, handle embedded numbers.
+int StringRef::compare_numeric(StringRef RHS) const {
+  for (size_t I = 0, E = min(Length, RHS.Length); I != E; ++I) {
+    if (Data[I] == RHS.Data[I])
+      continue;
+    if (ascii_isdigit(Data[I]) && ascii_isdigit(RHS.Data[I])) {
+      // The longer sequence of numbers is larger. This doesn't really handle
+      // prefixed zeros well.
+      for (size_t J = I+1; J != E+1; ++J) {
+        bool ld = J < Length && ascii_isdigit(Data[J]);
+        bool rd = J < RHS.Length && ascii_isdigit(RHS.Data[J]);
+        if (ld != rd)
+          return rd ? -1 : 1;
+        if (!rd)
+          break;
+      }
+    }
+    return Data[I] < RHS.Data[I] ? -1 : 1;
+  }
+  if (Length == RHS.Length)
+        return 0;
+  return Length < RHS.Length ? -1 : 1;
+}
+
 // Compute the edit distance between the two given strings.
 unsigned StringRef::edit_distance(llvm::StringRef Other, 
                                   bool AllowReplacements) {
diff --git a/lib/Support/Timer.cpp b/lib/Support/Timer.cpp
index 481f6ba..784b77c 100644
--- a/lib/Support/Timer.cpp
+++ b/lib/Support/Timer.cpp
@@ -61,6 +61,10 @@ raw_ostream *llvm::CreateInfoOutputFile() {
   if (OutputFilename == "-")
     return new raw_fd_ostream(1, false); // stdout.
   
+  // Append mode is used because the info output file is opened and closed
+  // each time -stats or -time-passes wants to print output to it. To
+  // compensate for this, the test-suite Makefiles have code to delete the
+  // info output file before running commands which write to it.
   std::string Error;
   raw_ostream *Result = new raw_fd_ostream(OutputFilename.c_str(),
                                            Error, raw_fd_ostream::F_Append);
diff --git a/lib/Support/Twine.cpp b/lib/Support/Twine.cpp
index 21504e9..b3ea013 100644
--- a/lib/Support/Twine.cpp
+++ b/lib/Support/Twine.cpp
@@ -48,10 +48,10 @@ void Twine::printOneChild(raw_ostream &OS, const void *Ptr,
     OS << *static_cast<const StringRef*>(Ptr); 
     break;
   case Twine::DecUIKind:
-    OS << *static_cast<const unsigned int*>(Ptr);
+    OS << (unsigned)(uintptr_t)Ptr;
     break;
   case Twine::DecIKind:
-    OS << *static_cast<const int*>(Ptr);
+    OS << (int)(intptr_t)Ptr;
     break;
   case Twine::DecULKind:
     OS << *static_cast<const unsigned long*>(Ptr);
@@ -95,10 +95,10 @@ void Twine::printOneChildRepr(raw_ostream &OS, const void *Ptr,
        << static_cast<const StringRef*>(Ptr) << "\"";
     break;
   case Twine::DecUIKind:
-    OS << "decUI:\"" << *static_cast<const unsigned int*>(Ptr) << "\"";
+    OS << "decUI:\"" << (unsigned)(uintptr_t)Ptr << "\"";
     break;
   case Twine::DecIKind:
-    OS << "decI:\"" << *static_cast<const int*>(Ptr) << "\"";
+    OS << "decI:\"" << (int)(intptr_t)Ptr << "\"";
     break;
   case Twine::DecULKind:
     OS << "decUL:\"" << *static_cast<const unsigned long*>(Ptr) << "\"";
diff --git a/lib/Support/raw_ostream.cpp b/lib/Support/raw_ostream.cpp
index 0b05c54..11cf0ec 100644
--- a/lib/Support/raw_ostream.cpp
+++ b/lib/Support/raw_ostream.cpp
@@ -21,6 +21,7 @@
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/ADT/STLExtras.h"
 #include <cctype>
+#include <cerrno>
 #include <sys/stat.h>
 #include <sys/types.h>
 
@@ -399,37 +400,76 @@ raw_fd_ostream::raw_fd_ostream(const char *Filename, std::string &ErrorInfo,
   if (Flags & F_Excl)
     OpenFlags |= O_EXCL;
 
-  FD = open(Filename, OpenFlags, 0664);
-  if (FD < 0) {
-    ErrorInfo = "Error opening output file '" + std::string(Filename) + "'";
-    ShouldClose = false;
-  } else {
-    ShouldClose = true;
+  while ((FD = open(Filename, OpenFlags, 0664)) < 0) {
+    if (errno != EINTR) {
+      ErrorInfo = "Error opening output file '" + std::string(Filename) + "'";
+      ShouldClose = false;
+      return;
+    }
   }
+
+  // Ok, we successfully opened the file, so it'll need to be closed.
+  ShouldClose = true;
 }
 
 raw_fd_ostream::~raw_fd_ostream() {
   if (FD < 0) return;
   flush();
   if (ShouldClose)
-    if (::close(FD) != 0)
-      error_detected();
+    while (::close(FD) != 0)
+      if (errno != EINTR) {
+        error_detected();
+        break;
+      }
 }
 
 
 void raw_fd_ostream::write_impl(const char *Ptr, size_t Size) {
   assert(FD >= 0 && "File already closed.");
   pos += Size;
-  if (::write(FD, Ptr, Size) != (ssize_t) Size)
-    error_detected();
+  ssize_t ret;
+
+  do {
+    ret = ::write(FD, Ptr, Size);
+
+    if (ret < 0) {
+      // If it's a recoverable error, swallow it and retry the write.
+      //
+      // Ideally we wouldn't ever see EAGAIN or EWOULDBLOCK here, since
+      // raw_ostream isn't designed to do non-blocking I/O. However, some
+      // programs, such as old versions of bjam, have mistakenly used
+      // O_NONBLOCK. For compatibility, emulate blocking semantics by
+      // spinning until the write succeeds. If you don't want spinning,
+      // don't use O_NONBLOCK file descriptors with raw_ostream.
+      if (errno == EINTR || errno == EAGAIN
+#ifdef EWOULDBLOCK
+          || errno == EWOULDBLOCK
+#endif
+          )
+        continue;
+
+      // Otherwise it's a non-recoverable error. Note it and quit.
+      error_detected();
+      break;
+    }
+
+    // The write may have written some or all of the data. Update the
+    // size and buffer pointer to reflect the remainder that needs
+    // to be written. If there are no bytes left, we're done.
+    Ptr += ret;
+    Size -= ret;
+  } while (Size > 0);
 }
 
 void raw_fd_ostream::close() {
   assert(ShouldClose);
   ShouldClose = false;
   flush();
-  if (::close(FD) != 0)
-    error_detected();
+  while (::close(FD) != 0)
+    if (errno != EINTR) {
+      error_detected();
+      break;
+    }
   FD = -1;
 }