[PATCH] [ARM] Improve handling of stack accesses in Thumb-1.

[John Brawn]

While working on improving the spill estimation I realised that it wasn't that which was causing frame offsets to be considered invalid, but instead that ARMII::AddrModeT1_s was treated as having 5 bits of offset but it actually has 8 bits of offset (5 bits is true for FP-based loads, but FP-based loads aren't used in Thumb-1). I've attached a new patch that fixes that also.


REPOSITORY
  rL LLVM

http://reviews.llvm.org/D7594

Files:
  lib/Target/ARM/ARMBaseRegisterInfo.cpp
  lib/Target/ARM/ARMISelDAGToDAG.cpp
  lib/Target/ARM/ARMInstrThumb.td
  test/CodeGen/Thumb/stack-access.ll

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