Merge commit 'qemu-svn/trunk'

Merge commit 'qemu-svn/trunk'

* commit 'qemu-svn/trunk': (32 commits)
  Fix hxtool eating backslash sequences
  fix format string warnings in block-qcow2.c (Christoph Hellwig)
  check for bs->drv in bdrv_flush (Christoph Hellwig)
  remove dead code in bdrv_check_request (Christoph Hellwig)
  target-mips: optimize write to env->hflags
  target-mips: optimize gen_muldiv()
  tcg: add _tl aliases for div/divu/rem/remu
  target-mips: optimize gen_HILO()
  target-mips: optimize gen_trap()
  target-mips: optimize gen_compute_branch()
  target-mips: don't mix result and arguments in gen_op_*
  target-mips: gen_bshfl()
  target-mips: optimize gen_mul_vr54xx()
  target-mips: optimize gen_cl()
  target-ppc: avoid nop to override next instruction
  target-alpha: bug fix: avoid nop to override next instruction
  target-alpha: remove PALCODE_ declarations (unused).
  target-alpha: add instruction name in comments for hw_ld opcode.
  Document which IPR are used by 21264
  target-alpha: tb_flush helper should flush the tb (and not the tlb).
  ...