68 lines
1.9 KiB
YAML
68 lines
1.9 KiB
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
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# RUN: llc -mtriple=aarch64 -o - -run-pass=early-tailduplication -verify-machineinstrs %s | FileCheck %s
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# Reproducer for a problem found with an out-of-tree target. This being
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# an attempt to re-create that for an in-tree target.
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#
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# When tail duplicator is duplicating the $s1 assignment into
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# bb.0 it need to resolve both the subreg access in the PHI
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# and the subreg access in the COPY.
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#
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# So what we expect is to find some thing like
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# $s1 = COPY %0.dsub_then_ssub
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# with two levels of subreg accesses (possibly composed into one subreg index).
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---
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name: foo2
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tracksRegLiveness: true
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body: |
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; CHECK-LABEL: name: foo2
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; CHECK: bb.0.entry:
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; CHECK-NEXT: successors: %bb.4(0x80000000)
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; CHECK-NEXT: liveins: $q1
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: [[COPY:%[0-9]+]]:fpr128 = COPY $q1
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; CHECK-NEXT: $s1 = COPY [[COPY]].ssub
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; CHECK-NEXT: [[COPY1:%[0-9]+]]:fpr64 = COPY [[COPY]].dsub
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; CHECK-NEXT: B %bb.4
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.1:
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; CHECK-NEXT: successors: %bb.4(0x80000000)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: [[DEF:%[0-9]+]]:fpr128 = IMPLICIT_DEF
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; CHECK-NEXT: $s1 = COPY [[DEF]].ssub
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; CHECK-NEXT: [[COPY2:%[0-9]+]]:fpr64 = COPY [[DEF]].dsub
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; CHECK-NEXT: B %bb.4
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.3:
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; CHECK-NEXT: successors: %bb.3(0x80000000)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: B %bb.3
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: bb.4:
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; CHECK-NEXT: successors: %bb.4(0x80000000)
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; CHECK-NEXT: {{ $}}
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; CHECK-NEXT: B %bb.4
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bb.0.entry:
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liveins: $q1
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%0:fpr128 = COPY $q1
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B %bb.2
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bb.1:
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%1:fpr128 = IMPLICIT_DEF
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B %bb.2
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bb.2:
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%2:fpr64 = PHI %0.dsub, %bb.0, %1.dsub, %bb.1
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$s1 = COPY %2.ssub
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B %bb.4
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bb.3:
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B %bb.3
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bb.4:
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B %bb.4
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...
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