acb4d143bd
The 'ELPM' instruction has three forms: -------------------------- | form | feature | | ----------- | -------- | | ELPM | hasELPM | | ELPM Rd, Z | hasELPMX | | ELPM Rd, Z+ | hasELPMX | -------------------------- The second form is always used in the expansion of pseudo instructions LPMWRdZ/ELPMWRdZ. But for devices without ELPMX and with only ELPM, only the first form can be used. Reviewed By: aykevl, Miss_Grape Differential Revision: https://reviews.llvm.org/D141264
114 lines
3.1 KiB
YAML
114 lines
3.1 KiB
YAML
# 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
|
|
...
|