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1# RUN: not llc -mtriple=amdgcn-amd-amdhsa -verify-machineinstrs -start-before=greedy,2 -filetype=null %s 2>&1 | FileCheck %s2 3# This testcase fails register allocation at the same time it performs4# virtual register splitting (by introducing VGPR to AGPR copies). We5# still need to enqueue and allocate the newly split vregs after the6# failure.7 8# The machine verifier should not complain about usage of register9# which is marked as killed in previous instruction. This happens due10# to when register allocator is out of registers it takes the first11# available register.12 13# CHECK: error: <unknown>:0:0: ran out of registers during register allocation14 15--- |16 17 define amdgpu_kernel void @alloc_failure_with_split_vregs(float %v0, float %v1) #0 {18 ret void19 }20 21 attributes #0 = { "amdgpu-waves-per-eu"="10,10" "target-cpu"="gfx908" }22 23...24---25name: alloc_failure_with_split_vregs26alignment: 127tracksRegLiveness: true28noPhis: true29isSSA: false30noVRegs: false31hasFakeUses: false32tracksDebugUserValues: true33registers:34 - { id: 0, class: sgpr_64, preferred-register: '$sgpr8_sgpr9', flags: [ ] }35 - { id: 1, class: areg_512, preferred-register: '%2', flags: [ ] }36 - { id: 2, class: vreg_512, preferred-register: '%1', flags: [ ] }37 - { id: 3, class: areg_512, preferred-register: '%4', flags: [ ] }38 - { id: 4, class: av_512, preferred-register: '$agpr0_agpr1_agpr2_agpr3_agpr4_agpr5_agpr6_agpr7_agpr8_agpr9_agpr10_agpr11_agpr12_agpr13_agpr14_agpr15',39 flags: [ ] }40 - { id: 5, class: areg_512, preferred-register: '%2', flags: [ ] }41 - { id: 6, class: vgpr_32, preferred-register: '', flags: [ ] }42 - { id: 7, class: vgpr_32, preferred-register: '', flags: [ ] }43 - { id: 8, class: vgpr_32, preferred-register: '', flags: [ ] }44machineFunctionInfo:45 isEntryFunction: true46 scratchRSrcReg: '$sgpr56_sgpr57_sgpr58_sgpr59'47 stackPtrOffsetReg: '$sgpr32'48 occupancy: 849 vgprForAGPRCopy: '$vgpr23'50 sgprForEXECCopy: '$sgpr58_sgpr59'51body: |52 bb.0:53 liveins: $sgpr8_sgpr954 55 renamable $sgpr0_sgpr1 = S_LOAD_DWORDX2_IMM killed renamable $sgpr8_sgpr9, 0, 0 :: (dereferenceable invariant load (s64), align 16, addrspace 4)56 %6:vgpr_32 = COPY renamable $sgpr057 INLINEASM &"; def $0", 1 /* sideeffect attdialect */, 10 /* regdef */, implicit-def $agpr058 undef %4.sub0:av_512 = COPY $agpr059 %3:areg_512 = COPY %460 %7:vgpr_32 = COPY killed renamable $sgpr161 early-clobber %1:areg_512 = V_MFMA_F32_16X16X1F32_e64 %6, %7, %3, 0, 0, 0, implicit $mode, implicit $exec, implicit $mode, implicit $exec62 %2:vreg_512 = COPY %163 %2.sub8:vreg_512 = COPY %4.sub064 %5:areg_512 = COPY %265 %5:areg_512 = V_MFMA_F32_16X16X1F32_mac_e64 %6, %7, %5, 0, 0, 0, implicit $mode, implicit $exec66 %8:vgpr_32 = COPY %5.sub367 $agpr1 = COPY %868 INLINEASM &"; use $0", 1 /* sideeffect attdialect */, 9 /* reguse */, killed $agpr169 S_ENDPGM 070 71...72