[PATCH] D117957: [AVR] Remove unused register scavenger

Sun Nov 27 06:30:52 PST 2022

aykevl marked an inline comment as done.
aykevl added a comment.

Thank you!

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Comment at: llvm/test/CodeGen/AVR/pseudo/ELPMWRdZ.mir:31
+    $r31r30 = COPY %3
+    RET implicit $r31r30
+...
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benshi001 wrote:
> Are the last two lines necessary ? I think the front 3 lines are OK enough.
Yes. This way the register allocator will try to use R31R30 for `%3` to avoid a copy but because of the earlyclobber flag it is forced to pick a different register pair. Therefore, it's a way to test that the earlyclobber works.

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  https://reviews.llvm.org/D117957/new/

https://reviews.llvm.org/D117957