# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py # RUN: llc -mtriple=aarch64-unknown-unknown -run-pass=aarch64-prelegalizer-combiner -verify-machineinstrs -o - %s | FileCheck %s # Test unary_op(undef) -> 0 combines ... --- name: abs_scalar tracksRegLiveness: true body: | bb.0: liveins: $w0 ; CHECK-LABEL: name: abs_scalar ; CHECK: liveins: $w0 ; CHECK-NEXT: {{ $}} ; CHECK-NEXT: %abs:_(s32) = G_CONSTANT i32 0 ; CHECK-NEXT: $w0 = COPY %abs(s32) ; CHECK-NEXT: RET_ReallyLR implicit $w0 %undef:_(s32) = G_IMPLICIT_DEF %abs:_(s32) = G_ABS %undef $w0 = COPY %abs(s32) RET_ReallyLR implicit $w0 ... --- name: abs_vector tracksRegLiveness: true body: | bb.0: liveins: $d0 ; CHECK-LABEL: name: abs_vector ; CHECK: liveins: $d0 ; CHECK-NEXT: {{ $}} ; CHECK-NEXT: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 0 ; CHECK-NEXT: %abs:_(<2 x s32>) = G_BUILD_VECTOR [[C]](s32), [[C]](s32) ; CHECK-NEXT: $d0 = COPY %abs(<2 x s32>) ; CHECK-NEXT: RET_ReallyLR implicit $d0 %undef:_(<2 x s32>) = G_IMPLICIT_DEF %abs:_(<2 x s32>) = G_ABS %undef $d0 = COPY %abs(<2 x s32>) RET_ReallyLR implicit $d0 ...