--- /dev/null
+# RUN: llc -march=amdgcn -mcpu=gfx900 -run-pass=greedy -o - -verify-machineinstrs %s | FileCheck -check-prefixes=MIR,RA %s
+# RUN: llc -march=amdgcn -mcpu=gfx900 -run-pass=greedy,virtregrewriter,post-RA-sched -o - -verify-machineinstrs %s | FileCheck -check-prefixes=MIR,VR %s
+# RUN: llc -march=amdgcn -mcpu=gfx900 -start-before=greedy -o - -verify-machineinstrs %s | FileCheck -check-prefix=ASM %s
+
+---
+# MIR-LABEL: name: splitkit_copy_bundle
+
+# RA: undef %4.sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7_sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15:sgpr_1024 = COPY %5.sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7_sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15 {
+# RA-NEXT: internal %4.sub12_sub13_sub14_sub15_sub16_sub17_sub18_sub19_sub20_sub21_sub22_sub23_sub24_sub25_sub26_sub27:sgpr_1024 = COPY %5.sub12_sub13_sub14_sub15_sub16_sub17_sub18_sub19_sub20_sub21_sub22_sub23_sub24_sub25_sub26_sub27
+# RA-NEXT: internal %4.sub28_sub29:sgpr_1024 = COPY %5.sub28_sub29
+# RA-NEXT: }
+
+# RA: undef %6.sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7_sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15:sgpr_1024 = COPY %4.sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7_sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15 {
+# RA-NEXT: internal %6.sub12_sub13_sub14_sub15_sub16_sub17_sub18_sub19_sub20_sub21_sub22_sub23_sub24_sub25_sub26_sub27:sgpr_1024 = COPY %4.sub12_sub13_sub14_sub15_sub16_sub17_sub18_sub19_sub20_sub21_sub22_sub23_sub24_sub25_sub26_sub27
+# RA-NEXT: internal %6.sub28_sub29:sgpr_1024 = COPY %4.sub28_sub29
+# RA-NEXT: }
+
+
+# RA: undef %4.sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7_sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15:sgpr_1024 = COPY %6.sub0_sub1_sub2_sub3_sub4_sub5_sub6_sub7_sub8_sub9_sub10_sub11_sub12_sub13_sub14_sub15 {
+# RA-NEXT: internal %4.sub12_sub13_sub14_sub15_sub16_sub17_sub18_sub19_sub20_sub21_sub22_sub23_sub24_sub25_sub26_sub27:sgpr_1024 = COPY %6.sub12_sub13_sub14_sub15_sub16_sub17_sub18_sub19_sub20_sub21_sub22_sub23_sub24_sub25_sub26_sub27
+# RA-NEXT: internal %4.sub28_sub29:sgpr_1024 = COPY %6.sub28_sub29
+# RA-NEXT: }
+
+
+# VR: renamable $sgpr80_sgpr81_sgpr82_sgpr83_sgpr84_sgpr85_sgpr86_sgpr87_sgpr88_sgpr89_sgpr90_sgpr91_sgpr92_sgpr93_sgpr94_sgpr95 = KILL undef renamable $sgpr80_sgpr81_sgpr82_sgpr83_sgpr84_sgpr85_sgpr86_sgpr87_sgpr88_sgpr89_sgpr90_sgpr91_sgpr92_sgpr93_sgpr94_sgpr95
+# VR-NEXT: renamable $sgpr96_sgpr97 = KILL undef renamable $sgpr96_sgpr97
+
+# ASM-LABEL: {{^}}splitkit_copy_bundle:
+# ASM: ; implicit-def: $sgpr34_sgpr35
+# ASM-NEXT: ; implicit-def: $sgpr98_sgpr99
+# ASM-NEXT: ; kill: def $sgpr80_sgpr81_sgpr82_sgpr83_sgpr84_sgpr85_sgpr86_sgpr87_sgpr88_sgpr89_sgpr90_sgpr91_sgpr92_sgpr93_sgpr94_sgpr95 killed $sgpr80_sgpr81_sgpr82_sgpr83_sgpr84_sgpr85_sgpr86_sgpr87_sgpr88_sgpr89_sgpr90_sgpr91_sgpr92_sgpr93_sgpr94_sgpr95
+# ASM-NEXT: ; kill: def $sgpr96_sgpr97 killed $sgpr96_sgpr97
+
+name: splitkit_copy_bundle
+tracksRegLiveness: true
+machineFunctionInfo:
+ scratchRSrcReg: '$sgpr0_sgpr1_sgpr2_sgpr3'
+ stackPtrOffsetReg: '$sgpr32'
+body: |
+ bb.0:
+ %0:sreg_64 = IMPLICIT_DEF
+ %1:sreg_64 = IMPLICIT_DEF
+ undef %2.sub1:sgpr_1024 = S_MOV_B32 -1
+ %2.sub0:sgpr_1024 = S_MOV_B32 -1
+ undef %3.sub0:sgpr_1024 = S_MOV_B32 0
+
+ bb.1:
+ %2.sub2:sgpr_1024 = COPY %2.sub0
+ %2.sub3:sgpr_1024 = COPY %2.sub1
+ %2.sub4:sgpr_1024 = COPY %2.sub0
+ %2.sub5:sgpr_1024 = COPY %2.sub1
+ %2.sub6:sgpr_1024 = COPY %2.sub0
+ %2.sub7:sgpr_1024 = COPY %2.sub1
+ %2.sub8:sgpr_1024 = COPY %2.sub0
+ %2.sub9:sgpr_1024 = COPY %2.sub1
+ %2.sub10:sgpr_1024 = COPY %2.sub0
+ %2.sub11:sgpr_1024 = COPY %2.sub1
+ %2.sub12:sgpr_1024 = COPY %2.sub0
+ %2.sub13:sgpr_1024 = COPY %2.sub1
+ %2.sub14:sgpr_1024 = COPY %2.sub0
+ %2.sub15:sgpr_1024 = COPY %2.sub1
+ %2.sub16:sgpr_1024 = COPY %2.sub0
+ %2.sub17:sgpr_1024 = COPY %2.sub1
+ %2.sub18:sgpr_1024 = COPY %2.sub0
+ %2.sub19:sgpr_1024 = COPY %2.sub1
+ %2.sub20:sgpr_1024 = COPY %2.sub0
+ %2.sub21:sgpr_1024 = COPY %2.sub1
+ %2.sub22:sgpr_1024 = COPY %2.sub0
+ %2.sub23:sgpr_1024 = COPY %2.sub1
+ %2.sub24:sgpr_1024 = COPY %2.sub0
+ %2.sub25:sgpr_1024 = COPY %2.sub1
+ %2.sub26:sgpr_1024 = COPY %2.sub0
+ %2.sub27:sgpr_1024 = COPY %2.sub1
+ %2.sub28:sgpr_1024 = COPY %2.sub0
+ %2.sub29:sgpr_1024 = COPY %2.sub1
+ %3.sub1:sgpr_1024 = COPY %3.sub0
+ %3.sub2:sgpr_1024 = COPY %3.sub0
+ %3.sub3:sgpr_1024 = COPY %3.sub0
+ %3.sub4:sgpr_1024 = COPY %3.sub0
+ %3.sub5:sgpr_1024 = COPY %3.sub0
+ %3.sub6:sgpr_1024 = COPY %3.sub0
+ %3.sub7:sgpr_1024 = COPY %3.sub0
+ %3.sub8:sgpr_1024 = COPY %3.sub0
+ %3.sub9:sgpr_1024 = COPY %3.sub0
+ %3.sub10:sgpr_1024 = COPY %3.sub0
+ %3.sub11:sgpr_1024 = COPY %3.sub0
+ %3.sub12:sgpr_1024 = COPY %3.sub0
+ %3.sub13:sgpr_1024 = COPY %3.sub0
+ %3.sub14:sgpr_1024 = COPY %3.sub0
+ %3.sub15:sgpr_1024 = COPY %3.sub0
+ %3.sub16:sgpr_1024 = COPY %3.sub0
+ %3.sub17:sgpr_1024 = COPY %3.sub0
+ %3.sub18:sgpr_1024 = COPY %3.sub0
+ %3.sub19:sgpr_1024 = COPY %3.sub0
+ %3.sub20:sgpr_1024 = COPY %3.sub0
+ %3.sub21:sgpr_1024 = COPY %3.sub0
+ %3.sub22:sgpr_1024 = COPY %3.sub0
+ %3.sub23:sgpr_1024 = COPY %3.sub0
+ %3.sub24:sgpr_1024 = COPY %3.sub0
+ %3.sub25:sgpr_1024 = COPY %3.sub0
+ %3.sub26:sgpr_1024 = COPY %3.sub0
+ %3.sub27:sgpr_1024 = COPY %3.sub0
+ %3.sub28:sgpr_1024 = COPY %3.sub0
+ %3.sub29:sgpr_1024 = COPY %3.sub0
+ %3.sub30:sgpr_1024 = COPY %3.sub0
+ %3.sub31:sgpr_1024 = COPY %3.sub0
+
+ bb.2:
+ S_NOP 0, implicit %0, implicit %1, csr_amdgpu_highregs
+ S_CBRANCH_VCCNZ %bb.1, implicit undef $vcc
+ S_BRANCH %bb.2
+
+...