e6dbf48d7a549e58a3d798bbbdc391e4d091b432 |
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19-Oct-2015 |
Alexandre Rames <alexandre.rames@linaro.org> |
ARM64: Instruction simplification for array accesses. HArrayGet and HArraySet with variable indexes generate two instructions on arm64, like add temp, obj, #data_offset ldr out, [temp, index LSL #shift_amount] When we have multiple accesses to the same array, the initial `add` instruction is redundant. This patch introduces the first instruction simplification in the arm64-specific instruction simplification pass. It splits HArrayGet and HArraySet using the new arm64-specific IR HIntermediateAddress. After that we run GVN again to squash the multiple occurrences of HIntermediateAddress. Change-Id: I2e3d12fbb07fed07b2cb2f3f47f99f5a032f8312
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