41 lines
1,010 B
Text
41 lines
1,010 B
Text
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# RUN: llc -mtriple=avr -mattr=+lpm -mattr=+lpmx -start-before=greedy %s -o - \
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# RUN: | FileCheck %s
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# RUN: llc -mtriple=avr -mattr=+lpm -mattr=-lpmx -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 8-bit LPMBRdZ 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_lpmbrdz() {
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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_lpmbrdz
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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_lpmbrdz:
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; CHECK: ; %bb.0:
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; CHECK-NEXT: lpm r30, Z
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; CHECK-NEXT: ret
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; NOX-LABEL: test_lpmbrdz
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; NOX: ; %bb.0:
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; NOX-NEXT: lpm
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; NOX-NEXT: mov r30, r0
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; NOX-NEXT: ret
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%1:zreg = COPY killed $r31r30
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%2:gpr8 = LPMBRdZ %1, implicit-def dead $r0
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$r30 = COPY %2
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RET implicit $r30
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...
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