114 lines
3.1 KiB
Text
114 lines
3.1 KiB
Text
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# RUN: llc -mtriple=avr -mattr=+lpm -mattr=+elpm -mattr=+lpmx -mattr=+elpmx \
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# RUN: -mattr=+movw -start-before=greedy %s -o - | FileCheck %s
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# RUN: llc -mtriple=avr -mattr=+lpm -mattr=+elpm -mattr=-lpmx -mattr=-elpmx \
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# RUN: -mattr=+addsubiw -mattr=+movw -start-before=greedy %s -o - \
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# RUN: | FileCheck --check-prefix=NOX %s
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# RUN: llc -mtriple=avr -mattr=+lpm -mattr=+elpm -mattr=-lpmx -mattr=-elpmx \
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# RUN: -mattr=-addsubiw -mattr=+movw -start-before=greedy %s -o - \
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# RUN: | FileCheck --check-prefix=NOADIWNOX %s
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# This test checks the expansion of the 16-bit ELPM pseudo instruction and that
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# the register allocator won't use R31R30 as an output register (which would
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# lead to undefined behavior).
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--- |
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target triple = "avr--"
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define void @test_elpmwrdz() {
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entry:
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ret void
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}
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define void @test_elpmwrdz_2() {
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entry:
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ret void
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}
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...
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---
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name: test_elpmwrdz
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $r31r30
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; CHECK-LABEL: test_elpmwrdz
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; CHECK: elpm r24, Z+
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; CHECK-NEXT: elpm r25, Z
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; CHECK-NEXT: movw r30, r24
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; NOX-LABEL: test_elpmwrdz
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; NOX: ; %bb.0:
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; NOX-NEXT: ldi r18, 1
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; NOX-NEXT: out
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; NOX-NEXT: elpm
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; NOX-NEXT: mov r24, r0
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; NOX-NEXT: adiw r30, 1
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; NOX-NEXT: elpm
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; NOX-NEXT: mov r25, r0
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; NOX-NEXT: movw r30, r24
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; NOADIWNOX-LABEL: test_elpmwrdz
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; NOADIWNOX: ; %bb.0:
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; NOADIWNOX-NEXT: ldi r18, 1
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; NOADIWNOX-NEXT: out
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; NOADIWNOX-NEXT: elpm
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; NOADIWNOX-NEXT: mov r24, r0
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; NOADIWNOX-NEXT: subi r30, 255
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; NOADIWNOX-NEXT: sbci r31, 255
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; NOADIWNOX-NEXT: elpm
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; NOADIWNOX-NEXT: mov r25, r0
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; NOADIWNOX-NEXT: movw r30, r24
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%1:zreg = COPY killed $r31r30
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%2:ld8 = LDIRdK 1
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%3:dregs = ELPMWRdZ %1, %2, implicit-def dead $r0
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$r31r30 = COPY %3
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RET implicit $r31r30
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...
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---
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name: test_elpmwrdz_2
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $r31r30
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; CHECK-LABEL: test_elpmwrdz_2
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; CHECK: ; %bb.0:
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; CHECK-NEXT: ldi r24, 1
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; CHECK-NEXT: out 59, r24
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; CHECK-NEXT: elpm r18, Z+
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; CHECK-NEXT: elpm r19, Z
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; CHECK-NEXT: sbiw r30, 1
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; CHECK-NEXT: ret
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; NOX-LABEL: test_elpmwrdz_2
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; NOX: ; %bb.0:
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; NOX-NEXT: ldi r24, 1
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; NOX-NEXT: out 59, r24
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; NOX-NEXT: elpm
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; NOX-NEXT: mov r18, r0
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; NOX-NEXT: adiw r30, 1
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; NOX-NEXT: elpm
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; NOX-NEXT: mov r19, r0
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; NOX-NEXT: sbiw r30, 1
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; NOX-NEXT: ret
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; NOADIWNOX-LABEL: test_elpmwrdz_2
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; NOADIWNOX: ; %bb.0:
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; NOADIWNOX-NEXT: ldi r24, 1
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; NOADIWNOX-NEXT: out 59, r24
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; NOADIWNOX-NEXT: elpm
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; NOADIWNOX-NEXT: mov r18, r0
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; NOADIWNOX-NEXT: subi r30, 255
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; NOADIWNOX-NEXT: sbci r31, 255
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; NOADIWNOX-NEXT: elpm
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; NOADIWNOX-NEXT: mov r19, r0
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; NOADIWNOX-NEXT: subi r30, 1
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; NOADIWNOX-NEXT: sbci r31, 0
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%1:zreg = COPY $r31r30
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%2:ld8 = LDIRdK 1
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%3:dregs = ELPMWRdZ %1, %2, implicit-def dead $r0
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RET implicit $r31r30
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...
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