1 # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
2 # RUN: llc -mtriple=aarch64 -mattr=+sve -mattr=+use-experimental-zeroing-pseudos -run-pass=aarch64-expand-pseudo %s -o - | FileCheck %s
4 # Should create an additional LSL to zero the lanes as the DstReg is not unique
7 define <vscale x 4 x float> @fsub_s_zero(<vscale x 4 x i1> %pg, <vscale x 4 x float> %a){
8 %a_z = select <vscale x 4 x i1> %pg, <vscale x 4 x float> %a, <vscale x 4 x float> zeroinitializer
9 %out = call <vscale x 4 x float> @llvm.aarch64.sve.fsub.nxv4f32(<vscale x 4 x i1> %pg,
10 <vscale x 4 x float> %a_z,
11 <vscale x 4 x float> %a_z)
12 ret <vscale x 4 x float> %out
15 declare <vscale x 4 x float> @llvm.aarch64.sve.fsub.nxv4f32(<vscale x 4 x i1>, <vscale x 4 x float>, <vscale x 4 x float>)
20 tracksRegLiveness: true
21 tracksDebugUserValues: true
24 - { reg: '$p0', virtual-reg: '' }
25 - { reg: '$z0', virtual-reg: '' }
30 ; CHECK-LABEL: name: fsub_s_zero
31 ; CHECK: liveins: $p0, $z0
33 ; CHECK-NEXT: BUNDLE implicit-def $z0, implicit-def $q0, implicit-def $d0, implicit-def $s0, implicit-def $h0, implicit-def $b0, implicit-def $z0_hi, implicit $p0, implicit $z0 {
34 ; CHECK-NEXT: $z0 = MOVPRFX_ZPzZ_S $p0, $z0
35 ; CHECK-NEXT: $z0 = LSL_ZPmI_S renamable $p0, internal $z0, 0
36 ; CHECK-NEXT: $z0 = FSUBR_ZPmZ_S renamable $p0, internal killed $z0, internal killed renamable $z0
38 ; CHECK-NEXT: RET undef $lr, implicit $z0
39 renamable $z0 = nnan ninf nsz arcp contract afn reassoc FSUB_ZPZZ_S_ZERO renamable $p0, killed renamable $z0, renamable $z0
40 RET_ReallyLR implicit $z0