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TheRock/compiler/amd-llvm/llvm/test/CodeGen/AArch64/GlobalISel/postlegalizer-combiner-merge.mir
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derek.holloway 7502bf64a4
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

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# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple aarch64 -run-pass=aarch64-postlegalizer-combiner -verify-machineinstrs %s -o - | FileCheck %s
---
name: merge_unmerge
alignment: 4
legalized: true
liveins:
- { reg: '$w0' }
body: |
bb.1.entry:
liveins: $x0
; CHECK-LABEL: name: merge_unmerge
; CHECK: liveins: $x0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s64) = COPY $x0
; CHECK-NEXT: $x0 = COPY [[COPY]](s64)
; CHECK-NEXT: RET_ReallyLR implicit $x0
%0:_(s64) = COPY $x0
%a:_(s32), %b:_(s32) = G_UNMERGE_VALUES %0
%merge:_(s64) = G_MERGE_VALUES %a, %b
$x0 = COPY %merge(s64)
RET_ReallyLR implicit $x0
...
---
name: merge_unmerge_mismatched_order
alignment: 4
legalized: true
liveins:
- { reg: '$w0' }
body: |
bb.1.entry:
liveins: $x0
; CHECK-LABEL: name: merge_unmerge_mismatched_order
; CHECK: liveins: $x0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s64) = COPY $x0
; CHECK-NEXT: %b:_(s32), %a:_(s32) = G_UNMERGE_VALUES [[COPY]](s64)
; CHECK-NEXT: %merge:_(s64) = G_MERGE_VALUES %a(s32), %b(s32)
; CHECK-NEXT: $x0 = COPY %merge(s64)
; CHECK-NEXT: RET_ReallyLR implicit $x0
%0:_(s64) = COPY $x0
%b:_(s32), %a:_(s32) = G_UNMERGE_VALUES %0
%merge:_(s64) = G_MERGE_VALUES %a, %b
$x0 = COPY %merge(s64)
RET_ReallyLR implicit $x0
...
---
name: merge_unmerge_mismatched_num_defs
alignment: 4
legalized: true
liveins:
- { reg: '$w0' }
body: |
bb.1.entry:
liveins: $q0
; CHECK-LABEL: name: merge_unmerge_mismatched_num_defs
; CHECK: liveins: $q0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: [[COPY:%[0-9]+]]:_(s128) = COPY $q0
; CHECK-NEXT: %a:_(s32), %b:_(s32), %c:_(s32), %d:_(s32) = G_UNMERGE_VALUES [[COPY]](s128)
; CHECK-NEXT: %merge:_(s64) = G_MERGE_VALUES %a(s32), %b(s32)
; CHECK-NEXT: $x0 = COPY %merge(s64)
; CHECK-NEXT: RET_ReallyLR implicit $x0
%0:_(s128) = COPY $q0
%a:_(s32), %b:_(s32), %c:_(s32), %d:_(s32) = G_UNMERGE_VALUES %0
%merge:_(s64) = G_MERGE_VALUES %a, %b
$x0 = COPY %merge(s64)
RET_ReallyLR implicit $x0
...
---
name: merge_to_zext
alignment: 4
legalized: true
liveins:
- { reg: '$w0' }
body: |
bb.1.entry:
liveins: $w0
; CHECK-LABEL: name: merge_to_zext
; CHECK: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: %v:_(s32) = COPY $w0
; CHECK-NEXT: %merge:_(s64) = G_ZEXT %v(s32)
; CHECK-NEXT: $x0 = COPY %merge(s64)
; CHECK-NEXT: RET_ReallyLR implicit $x0
%v:_(s32) = COPY $w0
%zero:_(s32) = G_CONSTANT i32 0
%merge:_(s64) = G_MERGE_VALUES %v, %zero
$x0 = COPY %merge(s64)
RET_ReallyLR implicit $x0
...