third_party/llvm-7.0/llvm/test/CodeGen/AVR/pseudo/LDWRdPtr-same-src-dst.mir

# RUN: llc -O0 %s -o - | FileCheck %s

# This test checks the expansion of the 16-bit LDWRdPtr pseudo instruction.

--- |
  target triple = "avr--"
  define void @test_ldwrdptr() {
  entry:
    ret void
  }
...

---
name:            test_ldwrdptr
tracksRegLiveness: true
body: |
  bb.0.entry:

    ; CHECK-LABEL: test_ldwrdptr

    ; CHECK:      ld [[SCRATCH:r[0-9]+]], Z+
    ; CHECK-NEXT: push [[SCRATCH]]
    ; CHECK-NEXT: ld [[SCRATCH]], Z
    ; CHECK-NEXT: mov r31, [[SCRATCH]]
    ; CHECK-NEXT: pop r30

    early-clobber $r31r30 = LDWRdPtr undef $r31r30
...