[PATCH] [AArch32] Added patterns for VCVT{A,N, P,M}.

[Chad Rosier]

Hi compnerd, t.p.northover, jmolloy, olista01,

All,
This patch adds patterns for VCVT{A,N, P,M}.  Patterns for lowering libm calls to VCVT{A,N,P,M}, e.g. (int)floorf(float) => VCVTM.s32.f32, are also included.  Please have a look.

 Regards,
   Chad

http://reviews.llvm.org/D5033

Files:
  lib/Target/ARM/ARMInstrVFP.td
  test/CodeGen/ARM/arm32-round-conv.ll
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