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1# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py2# RUN: llc -mtriple=aarch64-unknown-unknown -run-pass=aarch64-prelegalizer-combiner -verify-machineinstrs -o - %s | FileCheck %s3 4# Test unary_op(undef) -> 0 combines5 6...7---8name: abs_scalar9tracksRegLiveness: true10body: |11 bb.0:12 liveins: $w013 ; CHECK-LABEL: name: abs_scalar14 ; CHECK: liveins: $w015 ; CHECK-NEXT: {{ $}}16 ; CHECK-NEXT: %abs:_(s32) = G_CONSTANT i32 017 ; CHECK-NEXT: $w0 = COPY %abs(s32)18 ; CHECK-NEXT: RET_ReallyLR implicit $w019 %undef:_(s32) = G_IMPLICIT_DEF20 %abs:_(s32) = G_ABS %undef21 $w0 = COPY %abs(s32)22 RET_ReallyLR implicit $w023...24---25name: abs_vector26tracksRegLiveness: true27body: |28 bb.0:29 liveins: $d030 ; CHECK-LABEL: name: abs_vector31 ; CHECK: liveins: $d032 ; CHECK-NEXT: {{ $}}33 ; CHECK-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 034 ; CHECK-NEXT: %abs:_(<2 x s32>) = G_BUILD_VECTOR [[C]](s32), [[C]](s32)35 ; CHECK-NEXT: $d0 = COPY %abs(<2 x s32>)36 ; CHECK-NEXT: RET_ReallyLR implicit $d037 %undef:_(<2 x s32>) = G_IMPLICIT_DEF38 %abs:_(<2 x s32>) = G_ABS %undef39 $d0 = COPY %abs(<2 x s32>)40 RET_ReallyLR implicit $d041...42