CodeGen: do not attempt to invalidate virtual registers for zero-sized phis.

[oota-llvm.git] / lib / Support / Signals.cpp

diff --git a/lib/Support/Signals.cpp b/lib/Support/Signals.cpp
index 978d3b7ccb2a97af3485b5703360dd4906eed3b5..a11789372d935d38ac26af1df38f4a11f48f6ada 100644 (file)
--- a/lib/Support/Signals.cpp
+++ b/lib/Support/Signals.cpp
@@ -1,82 +1,34 @@
-//===- Signals.cpp - Signal Handling support ------------------------------===//
-// 
+//===- Signals.cpp - Signal Handling support --------------------*- C++ -*-===//
+//
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-// 
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
 //===----------------------------------------------------------------------===//
 //
 // This file defines some helpful functions for dealing with the possibility of
-// Unix signals occuring while your program is running.
+// Unix signals occurring while your program is running.
 //
 //===----------------------------------------------------------------------===//
 
-#include "Support/Signals.h"
-#include <vector>
-#include <algorithm>
-#include <cstdlib>
-#include <cstdio>
-#include "Config/config.h"     // Get the signal handler return type
-#ifdef HAVE_EXECINFO_H
-# include <execinfo.h>         // For backtrace().
-#endif
-#include <signal.h>
-#include <unistd.h>
-using namespace llvm;
-
-static std::vector<std::string> FilesToRemove;
-
-// IntSigs - Signals that may interrupt the program at any time.
-static const int IntSigs[] = {
-  SIGHUP, SIGINT, SIGQUIT, SIGKILL, SIGPIPE, SIGTERM, SIGUSR1, SIGUSR2
-};
-static const int *IntSigsEnd = IntSigs + sizeof(IntSigs)/sizeof(IntSigs[0]);
-
-// KillSigs - Signals that are synchronous with the program that will cause it
-// to die.
-static const int KillSigs[] = {
-  SIGILL, SIGTRAP, SIGABRT, SIGFPE, SIGBUS, SIGSEGV, SIGSYS, SIGXCPU, SIGXFSZ
-#ifdef SIGEMT
-  , SIGEMT
-#endif
-};
-static const int *KillSigsEnd = KillSigs + sizeof(KillSigs)/sizeof(KillSigs[0]);
-
-static void* StackTrace[256];
-
-// SignalHandler - The signal handler that runs...
-static RETSIGTYPE SignalHandler(int Sig) {
-  while (!FilesToRemove.empty()) {
-    std::remove(FilesToRemove.back().c_str());
-    FilesToRemove.pop_back();
-  }
+#include "llvm/Support/Signals.h"
+#include "llvm/Config/config.h"
 
-  if (std::find(IntSigs, IntSigsEnd, Sig) != IntSigsEnd)
-    exit(1);   // If this is an interrupt signal, exit the program
+namespace llvm {
+using namespace sys;
 
-  // Otherwise if it is a fault (like SEGV) output the stacktrace to
-  // STDERR (if we can) and reissue the signal to die...
-#ifdef HAVE_BACKTRACE
-  // Use backtrace() to output a backtrace on Linux systems with glibc.
-  int depth = backtrace(StackTrace, sizeof(StackTrace)/sizeof(StackTrace[0]));
-  backtrace_symbols_fd(StackTrace, depth, STDERR_FILENO);
-#endif
-  signal(Sig, SIG_DFL);
-}
-
-static void RegisterHandler(int Signal) { signal(Signal, SignalHandler); }
-
-// RemoveFileOnSignal - The public API
-void llvm::RemoveFileOnSignal(const std::string &Filename) {
-  FilesToRemove.push_back(Filename);
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only TRULY operating system
+//===          independent code.
+//===----------------------------------------------------------------------===//
 
-  std::for_each(IntSigs, IntSigsEnd, RegisterHandler);
-  std::for_each(KillSigs, KillSigsEnd, RegisterHandler);
 }
 
-/// PrintStackTraceOnErrorSignal - When an error signal (such as SIBABRT or
-/// SIGSEGV) is delivered to the process, print a stack trace and then exit.
-void llvm::PrintStackTraceOnErrorSignal() {
-  std::for_each(KillSigs, KillSigsEnd, RegisterHandler);
-}
+// Include the platform-specific parts of this class.
+#ifdef LLVM_ON_UNIX
+#include "Unix/Signals.inc"
+#endif
+#ifdef LLVM_ON_WIN32
+#include "Windows/Signals.inc"
+#endif