[AVR] Cherry-pick 17 upstream AVR backend fixes into the Rust LLVM fork#66

Merged

nikic merged 16 commits intorust-lang:rustc/10.0-2020-05-05from dylanmckay:avr-pick-upstream-llvm-fixes

Jun 23, 2020

+1,868-419

Commits on Jun 23, 2020

[AVR] Use correct register class for mul instructions

aykevl
authored and
dylanmckay
committed
[AVR] Don't adjust addresses by 2 for absolute values

aykevl
authored and
dylanmckay
committed
[AVR] Fix incorrect register state for LDRdPtr

tclin914
authored and
dylanmckay
committed
[AVR] Fix read of uninitialized variable AVRSubtarget:::ELFArch
dylanmckay
committed
[AVR] Fix reads of uninitialized variables from constructor of AVRSubtarget
dylanmckay
committed
[AVR] Respect the 'interrupt' function attribute
dylanmckay
committed
[AVR] Generalize the previous interrupt bugfix to signal handlers too
dylanmckay
committed
[AVR] Do not use divmod calls for bigger integers

aykevl
authored and
dylanmckay
committed
[AVR] Do not place functions in .progmem.data

aykevl
authored and
dylanmckay
committed
[AVR] Fix I/O instructions on XMEGA
dylanmckay
committed
[LLVM][AVR] Support for R_AVR_6 fixup
dylanmckay
committed
[AVR] Fix stack size in functions with a frame pointer

aykevl
authored and
dylanmckay
committed
[AVR] Remove faulty stack pushing behavior

aykevl
authored and
dylanmckay
committed
[AVR] Fix miscompilation of zext + add

aykevl
authored and
dylanmckay
committed
[AVR] Don't adjust for instruction size

aykevl
authored and
dylanmckay
committed
[AVR] Rewrite the function calling convention.
dylanmckay
committed