5650688e72
When expanding a MOVW (16-bit copy) to two MOVs (8-bit copy), the lower byte always comes first. This is incorrect for corner cases like '$r24r23 -> $r25r24', in which the higher byte copy should come first. Current patch fixes that bug as recorded at https://github.com/rust-lang/rust/issues/98167 Reviewed By: benshi001 Differential Revision: https://reviews.llvm.org/D128588
48 lines
781 B
YAML
48 lines
781 B
YAML
# RUN: llc -O0 %s -o - | FileCheck %s
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--- |
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target triple = "avr--"
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define void @test_copy_nonoverlapping() {
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entry:
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ret void
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}
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define void @test_copy_overlapping() {
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entry:
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ret void
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}
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declare void @foo(i16 %0)
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...
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---
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name: test_copy_nonoverlapping
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $r25r24
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; CHECK-LABEL: test_copy_nonoverlapping:
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; CHECK: mov r22, r24
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; CHECK-NEXT: mov r23, r25
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$r23r22 = COPY $r25r24
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RCALLk @foo, implicit $r24r23
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...
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---
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name: test_copy_overlapping
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tracksRegLiveness: true
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body: |
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bb.0.entry:
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liveins: $r24r23
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; CHECK-LABEL: test_copy_overlapping:
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; CHECK: mov r25, r24
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; CHECK-NEXT: mov r24, r23
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$r25r24 = COPY $r24r23
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RCALLk @foo, implicit $r25r24
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...
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