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# RUN: llc -mtriple=avr -mattr=+elpm -mattr=+elpmx -start-before=greedy %s -o - \
# RUN: | FileCheck %s
# RUN: llc -mtriple=avr -mattr=+elpm -mattr=-elpmx -start-before=greedy %s -o - \
# RUN: | FileCheck --check-prefix=NOX %s
# This test checks the expansion of the 16-bit ELPM pseudo instruction and that
# the register allocator won't use R31R30 as an output register (which would
# lead to undefined behavior).
--- |
target triple = "avr--"
define void @test_elpmbrdz() {
entry:
ret void
}
...
---
name: test_elpmbrdz
tracksRegLiveness: true
body: |
bb.0.entry:
liveins: $r31r30
; CHECK-LABEL: test_elpmbrdz
; CHECK: ; %bb.0:
; CHECK-NEXT: ldi r24, 1
; CHECK-NEXT: out
; CHECK-NEXT: elpm r31, Z
; CHECK-NEXT: ret
; NOX-LABEL: test_elpmbrdz
; NOX: ; %bb.0:
; NOX-NEXT: ldi r24, 1
; NOX-NEXT: out
; NOX-NEXT: elpm
; NOX-NEXT: mov r31, r0
; NOX-NEXT: ret
%1:zreg = COPY killed $r31r30
%2:ld8 = LDIRdK 1
%3:gpr8 = ELPMBRdZ %1, %2, implicit-def dead $r0
$r31 = COPY %3
RET implicit $r31
...
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