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Experimental AVR target improvements#1

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dylanmckay merged 13 commits intoavr-rust:avr-rust-2017-05-03avr-rust/llvm:avr-rust-2017-05-03from

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Oct 4, 2017

Commits

Commits on May 13, 2017

• [AVR] When lowering Select8/Select16, put newly generated MBBs in the same spot

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Commits on May 31, 2017

• [AVR] CPIRdK can only work with r16..r31; Authored by Dr. Gergo Erdi

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• [AVR] Fix a big in shift operator lowering; Authored by Dr. Gergo Erdi

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• [AVR] Remove SREG from CPI's Uses; authored by Florian Zeitz

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Commits on Jun 17, 2017

• [AVR] When lowering shifts into loops, put newly generated MBBs in the same

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• [AVR] Use 1-byte alignment for all types

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• [AVR] Add pseudo-instructions for relaxed branches.

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• [AVR] Implement LPMWRdZ pseudo-instruction's expansion.

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• [AVR] Add ISel pattern which maches load-from-global, compile it to

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• [AVR] Add 16-bit version of load-from-global

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• [AVR] Use separate ProgMemWrapper for GlobalAddresses of constants

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• #TEMP add temporary instrument selector pattern for creating pointers

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• [AVR] Elaborate LDWRdPtr into `ld r, X++; ld r+1, X`

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