[PATCH] D138582: [AVR] Do not use R0/R1 on avrtiny

[Ben Shi via Phabricator via llvm-commits]

benshi001 added inline comments.


================
Comment at: llvm/test/CodeGen/AVR/features/avr-tiny.ll:60
+; CHECK:       ; %bb.0:
+; CHECK-NEXT:    push r16
+; CHECK-NEXT:    in r16, 63
----------------
I do see r17 is pushed/poped by avr-gcc in this case.

```
// avr-gcc test.c -O3 -Wall -mmcu=attiny10

#include <avr/interrupt.h>

void foo(void);

ISR(BADISR_vect)
{
        foo();
}
```


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D138582/new/

https://reviews.llvm.org/D138582