Fix PR8247: JumpThreading can cause a block to become unreachable while still having predecessor, if it is part of a self-loop.
Because of this, we cannot use the Simplify* APIs, as they can assert-fail on unreachable code.  Since it's not easy to determine
if a given threading will cause a block to become unreachable, simply defer simplifying simplification to later InstCombine and/or
DCE passes.

llvm-svn: 115082

is not everything, but the remaining cases are less trivial.

llvm-svn: 115080

llvm-svn: 115076

llvm-svn: 115074

llvm-svn: 115072

llvm-svn: 115067

which require the use of the shifter-operand. This will be used to split
the ldr/str instructions such that those versions needing the shifter operand
can get a different scheduling itenerary, as in some cases, the use of the
shifter can cause different scheduling than the simpler forms.

llvm-svn: 115066

  lib/Target/X86/X86MCCodeEmitter.cpp: 190: error: suggest parentheses around '&&' within '||'

llvm-svn: 115064

for LLVM 2.9

llvm-svn: 115062

llvm-svn: 115061

llvm-svn: 115053

 - Also, fix indention in GetSourceVersion while in the area.

llvm-svn: 115048

LDM/STM instructions can run one cycle faster on some ARM processors if the
memory address is 64-bit aligned.  Radar 8489376.

llvm-svn: 115047

llvm-svn: 115045

llvm-svn: 115044

llvm-svn: 115043

shell runner.

We would inadvertently end up holding on to handles to the temporary files
longer than we should have been. On Win32, where open handles lock some file
operations, this caused problems in tests which would try to move temporary
files around (as Clang does by default now).

Many thanks to Francois Pichet for the excellent detective work on this.

llvm-svn: 115040

llvm-svn: 115039

One Printer to lower them all and in the back end bind them.


(Remove option to use the old non-MC asm printer.)

llvm-svn: 115038

llvm-svn: 115037

llvm-svn: 115036

do not compare actual branch labels; this may fix llvm-gcc-x86_64-darwin10-cross-mingw32 buildbot too

llvm-svn: 115034

added some doxygen on the way

llvm-svn: 115033

llvm-svn: 115032

merge all the llvm-gcc pieces together.  Recommend that people try dragonegg if they care about fortran performance.

llvm-svn: 115031

llvm-svn: 115030

llvm-svn: 115029

llvm-svn: 115027

llvm-svn: 115024

order as cctools for diffability.

llvm-svn: 115022

are defined to emit the 0x67 prefix byte.  rdar://8482675

llvm-svn: 115021

llvm-svn: 115020

operands.

With this done, we can remove the _Int suffixes from the round instructions
without the disassembler blowing up.  This allows the assembler to support
them, implementing rdar://8456376 - llvm-mc rejects 'roundss'

llvm-svn: 115019

Clean up cvttps2dq by removing some redundant implementations of the
same instruction.  rdar://8456382

llvm-svn: 115018

llvm-svn: 115017

an instruction that requires a WHOLE NEW wonderful kind of alias.

llvm-svn: 115015

MCStreamer to emit into instead of an MCInst to fill in.  This allows the
matcher extra flexibility and is more convenient.

llvm-svn: 115014

problems with phi-nodes in blocks that have hard and not virtual registers.

Accordingly update branch handling to compensate.

llvm-svn: 115013

llvm-svn: 115011

llvm-svn: 115010