# RUN: llc -mtriple=avr -mattr=+lpm -mattr=+elpm -mattr=+lpmx -mattr=+elpmx \
# RUN: -mattr=+movw -start-before=greedy %s -o - | FileCheck %s
# RUN: llc -mtriple=avr -mattr=+lpm -mattr=+elpm -mattr=-lpmx -mattr=-elpmx \
# RUN: -mattr=+addsubiw -mattr=+movw -start-before=greedy %s -o - \
# RUN: | FileCheck --check-prefix=NOX %s
# RUN: llc -mtriple=avr -mattr=+lpm -mattr=+elpm -mattr=-lpmx -mattr=-elpmx \
# RUN: -mattr=-addsubiw -mattr=+movw -start-before=greedy %s -o - \
# RUN: | FileCheck --check-prefix=NOADIWNOX %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_elpmwrdz() {
entry:
ret void
}
define void @test_elpmwrdz_2() {
entry:
ret void
}
...
---
name: test_elpmwrdz
tracksRegLiveness: true
body: |
bb.0.entry:
liveins: $r31r30
; CHECK-LABEL: test_elpmwrdz
; CHECK: elpm r24, Z+
; CHECK-NEXT: elpm r25, Z
; CHECK-NEXT: movw r30, r24
; NOX-LABEL: test_elpmwrdz
; NOX: ; %bb.0:
; NOX-NEXT: ldi r18, 1
; NOX-NEXT: out
; NOX-NEXT: elpm
; NOX-NEXT: mov r24, r0
; NOX-NEXT: adiw r30, 1
; NOX-NEXT: elpm
; NOX-NEXT: mov r25, r0
; NOX-NEXT: movw r30, r24
; NOADIWNOX-LABEL: test_elpmwrdz
; NOADIWNOX: ; %bb.0:
; NOADIWNOX-NEXT: ldi r18, 1
; NOADIWNOX-NEXT: out
; NOADIWNOX-NEXT: elpm
; NOADIWNOX-NEXT: mov r24, r0
; NOADIWNOX-NEXT: subi r30, 255
; NOADIWNOX-NEXT: sbci r31, 255
; NOADIWNOX-NEXT: elpm
; NOADIWNOX-NEXT: mov r25, r0
; NOADIWNOX-NEXT: movw r30, r24
%1:zreg = COPY killed $r31r30
%2:ld8 = LDIRdK 1
%3:dregs = ELPMWRdZ %1, %2, implicit-def dead $r0
$r31r30 = COPY %3
RET implicit $r31r30
...
---
name: test_elpmwrdz_2
tracksRegLiveness: true
body: |
bb.0.entry:
liveins: $r31r30
; CHECK-LABEL: test_elpmwrdz_2
; CHECK: ; %bb.0:
; CHECK-NEXT: ldi r24, 1
; CHECK-NEXT: out 59, r24
; CHECK-NEXT: elpm r18, Z+
; CHECK-NEXT: elpm r19, Z
; CHECK-NEXT: sbiw r30, 1
; CHECK-NEXT: ret
; NOX-LABEL: test_elpmwrdz_2
; NOX: ; %bb.0:
; NOX-NEXT: ldi r24, 1
; NOX-NEXT: out 59, r24
; NOX-NEXT: elpm
; NOX-NEXT: mov r18, r0
; NOX-NEXT: adiw r30, 1
; NOX-NEXT: elpm
; NOX-NEXT: mov r19, r0
; NOX-NEXT: sbiw r30, 1
; NOX-NEXT: ret
; NOADIWNOX-LABEL: test_elpmwrdz_2
; NOADIWNOX: ; %bb.0:
; NOADIWNOX-NEXT: ldi r24, 1
; NOADIWNOX-NEXT: out 59, r24
; NOADIWNOX-NEXT: elpm
; NOADIWNOX-NEXT: mov r18, r0
; NOADIWNOX-NEXT: subi r30, 255
; NOADIWNOX-NEXT: sbci r31, 255
; NOADIWNOX-NEXT: elpm
; NOADIWNOX-NEXT: mov r19, r0
; NOADIWNOX-NEXT: subi r30, 1
; NOADIWNOX-NEXT: sbci r31, 0
%1:zreg = COPY $r31r30
%2:ld8 = LDIRdK 1
%3:dregs = ELPMWRdZ %1, %2, implicit-def dead $r0
RET implicit $r31r30
...
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