[PATCH] D39752: [ARM] Place jump table as the first operand in additions

[Momchil Velikov via Phabricator via llvm-commits]

chill created this revision.
Herald added subscribers: kristof.beyls, javed.absar, aemerson.

When generating table jump code for switch statements, place the jump
table label as the first operand in the various addition instructions in
order to enable addressing mode selectors to better match index
computation and possibly fold them into the addressing mode of the table
entry load instruction.


Repository:
  rL LLVM

https://reviews.llvm.org/D39752

Files:
  lib/Target/ARM/ARMAsmPrinter.cpp
  lib/Target/ARM/ARMConstantIslandPass.cpp
  lib/Target/ARM/ARMISelLowering.cpp
  test/CodeGen/ARM/arm-position-independence-jump-table.ll
  test/CodeGen/ARM/execute-only.ll
  test/CodeGen/ARM/v6-jumptable-clobber.mir

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