46 lines
1.1 KiB
Text
46 lines
1.1 KiB
Text
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# RUN: llc -mtriple=avr -mattr=+elpm -mattr=+elpmx -start-before=greedy %s -o - \
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# RUN: | FileCheck %s
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# RUN: llc -mtriple=avr -mattr=+elpm -mattr=-elpmx -start-before=greedy %s -o - \
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# RUN: | FileCheck --check-prefix=NOX %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_elpmbrdz() {
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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_elpmbrdz
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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_elpmbrdz
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; CHECK: ; %bb.0:
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; CHECK-NEXT: ldi r24, 1
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; CHECK-NEXT: out
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; CHECK-NEXT: elpm r31, Z
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; CHECK-NEXT: ret
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; NOX-LABEL: test_elpmbrdz
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; NOX: ; %bb.0:
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; NOX-NEXT: ldi r24, 1
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; NOX-NEXT: out
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; NOX-NEXT: elpm
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; NOX-NEXT: mov r31, r0
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; NOX-NEXT: ret
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%1:zreg = COPY killed $r31r30
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%2:ld8 = LDIRdK 1
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%3:gpr8 = ELPMBRdZ %1, %2, implicit-def dead $r0
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$r31 = COPY %3
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RET implicit $r31
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...
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