1 # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
2 # RUN: llc -O0 -mtriple=aarch64-apple-ios -global-isel -start-before=legalizer -stop-after=instruction-select %s -o - | FileCheck %s
4 # We run the legalizer to combine the trivial EXTRACT_SEQ pair, leaving %1 and
5 # %2 orphaned after instruction-selection (no instructions define or use
6 # them). This shouldn't be a problem.
9 target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
11 define void @unused_reg() { ret void }
17 tracksRegLiveness: true
23 ; CHECK-LABEL: name: unused_reg
25 ; CHECK: [[COPY:%[0-9]+]]:gpr32all = COPY $w0
26 ; CHECK: $w0 = COPY [[COPY]]
27 %0:gpr(s32) = COPY $w0
28 %1:gpr(s64) = G_MERGE_VALUES %0(s32), %0(s32)
29 %2:gpr(s32), %3:gpr(s32) = G_UNMERGE_VALUES %1(s64)