It's not necessary to do rounding for alloca operations when the requested

alignment is equal to the stack alignment.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 95 insertions, 0 deletions

diff --git a/include/llvm/System/Program.h b/include/llvm/System/Program.h
new file mode 100644
index 0000000..cef3805
--- /dev/null
+++ b/include/llvm/System/Program.h
@@ -0,0 +1,95 @@
+//===- llvm/System/Program.h ------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Reid Spencer and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the llvm::sys::Program class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SYSTEM_PROGRAM_H
+#define LLVM_SYSTEM_PROGRAM_H
+
+#include "llvm/System/Path.h"
+#include "llvm/System/IncludeFile.h"
+#include <vector>
+
+namespace llvm {
+namespace sys {
+
+  /// This class provides an abstraction for programs that are executable by the
+  /// operating system. It provides a platform generic way to find executable
+  /// programs from the path and to execute them in various ways. The sys::Path
+  /// class is used to specify the location of the Program.
+  /// @since 1.4
+  /// @brief An abstraction for finding and executing programs.
+  class Program {
+    /// @name Methods
+    /// @{
+    public:
+      /// This static constructor (factory) will attempt to locate a program in
+      /// the operating system's file system using some pre-determined set of
+      /// locations to search (e.g. the PATH on Unix).
+      /// @returns A Path object initialized to the path of the program or a
+      /// Path object that is empty (invalid) if the program could not be found.
+      /// @throws nothing
+      /// @brief Construct a Program by finding it by name.
+      static Path FindProgramByName(const std::string& name);
+
+      /// This function executes the program using the \p arguments provided and
+      /// waits for the program to exit. This function will block the current
+      /// program until the invoked program exits. The invoked program will
+      /// inherit the stdin, stdout, and stderr file descriptors, the
+      /// environment and other configuration settings of the invoking program.
+      /// If Path::executable() does not return true when this function is
+      /// called then a std::string is thrown.
+      /// @returns an integer result code indicating the status of the program.
+      /// A zero or positive value indicates the result code of the program. A
+      /// negative value is the signal number on which it terminated. 
+      /// @see FindProgrambyName
+      /// @brief Executes the program with the given set of \p args.
+      static int ExecuteAndWait(
+        const Path& path,  ///< sys::Path object providing the path of the 
+          ///< program to be executed. It is presumed this is the result of 
+          ///< the FindProgramByName method.
+        const char** args, ///< A vector of strings that are passed to the
+          ///< program.  The first element should be the name of the program.
+          ///< The list *must* be terminated by a null char* entry.
+        const char ** env = 0, ///< An optional vector of strings to use for
+          ///< the program's environment. If not provided, the current program's
+          ///< environment will be used.
+        const sys::Path** redirects = 0, ///< An optional array of pointers to
+          ///< Paths. If the array is null, no redirection is done. The array
+          ///< should have a size of at least three. If the pointer in the array
+          ///< are not null, then the inferior process's stdin(0), stdout(1),
+          ///< and stderr(2) will be redirected to the corresponding Paths.
+        unsigned secondsToWait = 0, ///< If non-zero, this specifies the amount
+          ///< of time to wait for the child process to exit. If the time
+          ///< expires, the child is killed and this call returns. If zero,
+          ///< this function will wait until the child finishes or forever if
+          ///< it doesn't.
+        unsigned memoryLimit = 0, ///< If non-zero, this specifies max. amount
+          ///< of memory can be allocated by process. If memory usage will be
+          ///< higher limit, the child is killed and this call returns. If zero -
+          ///< no memory limit.
+        std::string* ErrMsg = 0 ///< If non-zero, provides a pointer to a string
+          ///< instance in which error messages will be returned. If the string 
+          ///< is non-empty upon return an error occurred while invoking the
+          ///< program.
+      );
+      // These methods change the specified standard stream (stdin or stdout) to
+      // binary mode. They return true if an error occurred
+      static bool ChangeStdinToBinary();
+      static bool ChangeStdoutToBinary();
+    /// @}
+  };
+}
+}
+
+FORCE_DEFINING_FILE_TO_BE_LINKED(SystemProgram)
+
+#endif