TimeValue()::now().toEpochTime() is supposed to be the same as time(),
but it wasn't, because toEpoch subtracted PosixZeroTime, but now()
didn't add PosixZeroTime!
Add a unittest to check this works.

llvm-svn: 94178

forcing them down into various .cpp files.

This change also:
1. Renames TimeValue::toString() and Path::toString() to ::str()
   for similarity with the STL.
2. Removes all stream insertion support for sys::Path, forcing
   clients to call .str().
3. Removes a use of Config/alloca.h from bugpoint, using smallvector
   instead.
4. Weans llvm-db off <iostream>

sys::Path really needs to be gutted, but I don't have the desire to
do it at this point.

llvm-svn: 79869

llvm-svn: 45418

just return MinTime if that should ever happen.

llvm-svn: 29826

llvm-svn: 22081

llvm-svn: 21704

llvm-svn: 19544

gdb debugger doesn't get confused on which file it is reading (the one in
lib/System or the one in lib/System/{Win32,Unix})

llvm-svn: 19426

* Remove redundant #includes that are now in Unix.h

llvm-svn: 19160

* get rid of (void) construct in function declarations
* make toString a const member
* add a default implementation of toString for Win32

llvm-svn: 17873

llvm-svn: 17815

seemingly ubiquitous gettimeofday(3) call.

llvm-svn: 17813

llvm-svn: 17782

llvm-svn: 16513

"Program" operating system concept (find and execute programs).

llvm-svn: 16084

note individually but these essence of it is to not derive from
std::string, clarify the interface, and provide better documentation.
There is now also (untested) implementations for AIX, Darwin, and SunOS.

llvm-svn: 16078

llvm-svn: 16048