[AMDGPU][NFC] Precommit tests representing agpr spills. (llvm#115270)

Presently we are only marking implicit-def for the
spilled AGPR tuple in the first spill instructions
and not implicit.

Change-Id: I1667df1d89a54346dc55662f2c7f89d335376b77

Author: pravinjagtap

llvm/test/CodeGen/AMDGPU/av-spill-expansion-with-machine-cp.mir

@@ -0,0 +1,150 @@
+# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
+# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 %s -o - -run-pass prologepilog -verify-machineinstrs | FileCheck -check-prefix=GFX908-PEI %s
+# RUN: llc -mtriple=amdgcn-amd-amdhsa -mcpu=gfx908 %s -o - -run-pass prologepilog,machine-cp -verify-machineinstrs | FileCheck -check-prefix=GFX908-PEI-MACHINECP %s
+
+# When VGPRs are available for spilling, prologepilog marks the tuple implicit-def as well as implicit in the first spill instruction.
+# As a consequence, machine-cp would NOT delete agpr2 copy here.
+
+---
+name:  agpr-spill-to-vgpr-machine-cp
+tracksRegLiveness: true
+stack:
+  - { id: 0, name: '', type: spill-slot, offset: 0, size: 128, alignment: 4 }
+machineFunctionInfo:
+  scratchRSrcReg:  $sgpr0_sgpr1_sgpr2_sgpr3
+  stackPtrOffsetReg: '$sgpr32'
+  hasSpilledVGPRs: true
+body: |
+  bb.0:
+    successors:
+    liveins: $vgpr0, $vgpr1
+    ; GFX908-PEI-LABEL: name: agpr-spill-to-vgpr-machine-cp
+    ; GFX908-PEI: liveins: $vgpr0, $vgpr1, $vgpr2, $vgpr3, $vgpr4, $vgpr5, $vgpr6, $vgpr7, $vgpr8, $vgpr9, $vgpr10, $vgpr11, $vgpr12, $vgpr13, $vgpr14, $vgpr15, $vgpr16, $vgpr17, $vgpr18, $vgpr19, $vgpr20, $vgpr21, $vgpr22, $vgpr23, $vgpr24, $vgpr25, $vgpr26, $vgpr27, $vgpr28, $vgpr29, $vgpr30, $vgpr31, $vgpr32, $vgpr33
+    ; GFX908-PEI-NEXT: {{  $}}
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION llvm_def_aspace_cfa $sgpr32_lo16, 0, 6
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION llvm_register_pair $pc_reg, $sgpr30_lo16, 32, $sgpr31_lo16, 32
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr31_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr32_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr33_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $agpr0_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $agpr1_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $agpr2_lo16
+    ; GFX908-PEI-NEXT: renamable $agpr0 = COPY renamable $vgpr0, implicit $exec
+    ; GFX908-PEI-NEXT: renamable $agpr2 = COPY renamable $vgpr1, implicit $exec
+    ; GFX908-PEI-NEXT: $vgpr33 = V_ACCVGPR_READ_B32_e64 $agpr0, implicit $exec, implicit-def $agpr0_agpr1_agpr2, implicit $agpr0_agpr1_agpr2
+    ; GFX908-PEI-NEXT: $vgpr32 = V_ACCVGPR_READ_B32_e64 $agpr1, implicit $exec
+    ; GFX908-PEI-NEXT: $vgpr31 = V_ACCVGPR_READ_B32_e64 $agpr2, implicit $exec, implicit $agpr0_agpr1_agpr2
+    ; GFX908-PEI-NEXT: S_ENDPGM 0
+    ;
+    ; GFX908-PEI-MACHINECP-LABEL: name: agpr-spill-to-vgpr-machine-cp
+    ; GFX908-PEI-MACHINECP: liveins: $vgpr0, $vgpr1, $vgpr2, $vgpr3, $vgpr4, $vgpr5, $vgpr6, $vgpr7, $vgpr8, $vgpr9, $vgpr10, $vgpr11, $vgpr12, $vgpr13, $vgpr14, $vgpr15, $vgpr16, $vgpr17, $vgpr18, $vgpr19, $vgpr20, $vgpr21, $vgpr22, $vgpr23, $vgpr24, $vgpr25, $vgpr26, $vgpr27, $vgpr28, $vgpr29, $vgpr30, $vgpr31, $vgpr32, $vgpr33
+    ; GFX908-PEI-MACHINECP-NEXT: {{  $}}
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION llvm_def_aspace_cfa $sgpr32_lo16, 0, 6
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION llvm_register_pair $pc_reg, $sgpr30_lo16, 32, $sgpr31_lo16, 32
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr31_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr32_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr33_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $agpr0_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $agpr1_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $agpr2_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: renamable $agpr0 = COPY renamable $vgpr0, implicit $exec
+    ; GFX908-PEI-MACHINECP-NEXT: renamable $agpr2 = COPY renamable $vgpr1, implicit $exec
+    ; GFX908-PEI-MACHINECP-NEXT: $vgpr33 = V_ACCVGPR_READ_B32_e64 $agpr0, implicit $exec, implicit-def $agpr0_agpr1_agpr2, implicit $agpr0_agpr1_agpr2
+    ; GFX908-PEI-MACHINECP-NEXT: $vgpr32 = V_ACCVGPR_READ_B32_e64 $agpr1, implicit $exec
+    ; GFX908-PEI-MACHINECP-NEXT: $vgpr31 = V_ACCVGPR_READ_B32_e64 $agpr2, implicit $exec, implicit $agpr0_agpr1_agpr2
+    ; GFX908-PEI-MACHINECP-NEXT: S_ENDPGM 0
+    renamable $agpr0 = COPY renamable $vgpr0, implicit $exec
+    renamable $agpr2 = COPY renamable $vgpr1, implicit $exec
+    SI_SPILL_AV96_SAVE $agpr0_agpr1_agpr2, %stack.0, $sgpr32, 0, implicit $exec :: (store (s96) into %stack.0, align 4, addrspace 5)
+    S_ENDPGM 0
+...
+
+# When VGPRs are NOT available for spilling (stack is used), prologepilog marks the tuple implicit-def only and NOT implicit.
+# As a consequence, machine-cp would delete agpr2 copy here. Presently, this is incorrect behavior.
+
+---
+name:  agpr-spill-to-vgpr-to-stack-machine-cp
+tracksRegLiveness: true
+stack:
+  - { id: 0, name: '', type: spill-slot, offset: 0, size: 128, alignment: 4 }
+machineFunctionInfo:
+  scratchRSrcReg:  $sgpr0_sgpr1_sgpr2_sgpr3
+  stackPtrOffsetReg: '$sgpr32'
+  hasSpilledVGPRs: true
+body: |
+  bb.0:
+    successors:
+    liveins: $vgpr0, $vgpr1
+    ; GFX908-PEI-LABEL: name: agpr-spill-to-vgpr-to-stack-machine-cp
+    ; GFX908-PEI: liveins: $vgpr0, $vgpr1, $vgpr18, $vgpr19, $vgpr20, $vgpr21, $vgpr22, $vgpr23, $vgpr24, $vgpr25, $vgpr26, $vgpr27, $vgpr28, $vgpr29, $vgpr30, $vgpr31, $vgpr32, $vgpr33, $vgpr34, $vgpr35, $vgpr36, $vgpr37, $vgpr38, $vgpr39, $vgpr48, $vgpr49, $vgpr50, $vgpr51, $vgpr52, $vgpr53, $vgpr54, $vgpr55
+    ; GFX908-PEI-NEXT: {{  $}}
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION llvm_def_aspace_cfa $sgpr32_lo16, 0, 6
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION llvm_register_pair $pc_reg, $sgpr30_lo16, 32, $sgpr31_lo16, 32
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr2_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr3_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr4_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr5_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr6_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr7_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr8_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr9_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr10_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr11_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr12_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr13_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr14_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr15_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr16_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr17_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $agpr0_lo16
+    ; GFX908-PEI-NEXT: frame-setup CFI_INSTRUCTION undefined $agpr2_lo16
+    ; GFX908-PEI-NEXT: renamable $agpr0 = COPY renamable $vgpr0, implicit $exec
+    ; GFX908-PEI-NEXT: renamable $agpr2 = COPY renamable $vgpr1, implicit $exec
+    ; GFX908-PEI-NEXT: $vgpr2_vgpr3_vgpr4_vgpr5_vgpr6_vgpr7_vgpr8_vgpr9 = IMPLICIT_DEF
+    ; GFX908-PEI-NEXT: $vgpr10_vgpr11_vgpr12_vgpr13_vgpr14_vgpr15_vgpr16_vgpr17 = IMPLICIT_DEF
+    ; GFX908-PEI-NEXT: $vgpr40 = V_ACCVGPR_READ_B32_e64 $agpr0, implicit $exec, implicit-def $agpr0_agpr1_agpr2
+    ; GFX908-PEI-NEXT: BUFFER_STORE_DWORD_OFFSET $vgpr40, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 0, 0, 0, implicit $exec, implicit $agpr0_agpr1_agpr2 :: (store (s32) into %stack.0, addrspace 5)
+    ; GFX908-PEI-NEXT: $vgpr40 = V_ACCVGPR_READ_B32_e64 $agpr1, implicit $exec
+    ; GFX908-PEI-NEXT: BUFFER_STORE_DWORD_OFFSET $vgpr40, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 4, 0, 0, implicit $exec :: (store (s32) into %stack.0 + 4, addrspace 5)
+    ; GFX908-PEI-NEXT: $vgpr55 = V_ACCVGPR_READ_B32_e64 $agpr2, implicit $exec, implicit $agpr0_agpr1_agpr2
+    ; GFX908-PEI-NEXT: S_ENDPGM 0
+    ;
+    ; GFX908-PEI-MACHINECP-LABEL: name: agpr-spill-to-vgpr-to-stack-machine-cp
+    ; GFX908-PEI-MACHINECP: liveins: $vgpr0, $vgpr1, $vgpr18, $vgpr19, $vgpr20, $vgpr21, $vgpr22, $vgpr23, $vgpr24, $vgpr25, $vgpr26, $vgpr27, $vgpr28, $vgpr29, $vgpr30, $vgpr31, $vgpr32, $vgpr33, $vgpr34, $vgpr35, $vgpr36, $vgpr37, $vgpr38, $vgpr39, $vgpr48, $vgpr49, $vgpr50, $vgpr51, $vgpr52, $vgpr53, $vgpr54, $vgpr55
+    ; GFX908-PEI-MACHINECP-NEXT: {{  $}}
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION llvm_def_aspace_cfa $sgpr32_lo16, 0, 6
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION llvm_register_pair $pc_reg, $sgpr30_lo16, 32, $sgpr31_lo16, 32
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr2_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr3_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr4_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr5_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr6_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr7_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr8_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr9_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr10_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr11_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr12_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr13_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr14_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr15_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr16_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $vgpr17_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $agpr0_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: frame-setup CFI_INSTRUCTION undefined $agpr2_lo16
+    ; GFX908-PEI-MACHINECP-NEXT: renamable $agpr0 = COPY renamable $vgpr0, implicit $exec
+    ; GFX908-PEI-MACHINECP-NEXT: $vgpr2_vgpr3_vgpr4_vgpr5_vgpr6_vgpr7_vgpr8_vgpr9 = IMPLICIT_DEF
+    ; GFX908-PEI-MACHINECP-NEXT: $vgpr10_vgpr11_vgpr12_vgpr13_vgpr14_vgpr15_vgpr16_vgpr17 = IMPLICIT_DEF
+    ; GFX908-PEI-MACHINECP-NEXT: $vgpr40 = V_ACCVGPR_READ_B32_e64 $agpr0, implicit $exec, implicit-def $agpr0_agpr1_agpr2
+    ; GFX908-PEI-MACHINECP-NEXT: BUFFER_STORE_DWORD_OFFSET $vgpr40, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 0, 0, 0, implicit $exec, implicit $agpr0_agpr1_agpr2 :: (store (s32) into %stack.0, addrspace 5)
+    ; GFX908-PEI-MACHINECP-NEXT: $vgpr40 = V_ACCVGPR_READ_B32_e64 $agpr1, implicit $exec
+    ; GFX908-PEI-MACHINECP-NEXT: BUFFER_STORE_DWORD_OFFSET $vgpr40, $sgpr0_sgpr1_sgpr2_sgpr3, $sgpr32, 4, 0, 0, implicit $exec :: (store (s32) into %stack.0 + 4, addrspace 5)
+    ; GFX908-PEI-MACHINECP-NEXT: $vgpr55 = V_ACCVGPR_READ_B32_e64 $agpr2, implicit $exec, implicit $agpr0_agpr1_agpr2
+    ; GFX908-PEI-MACHINECP-NEXT: S_ENDPGM 0
+    renamable $agpr0 = COPY renamable $vgpr0, implicit $exec
+    renamable $agpr2 = COPY renamable $vgpr1, implicit $exec
+    $vgpr2_vgpr3_vgpr4_vgpr5_vgpr6_vgpr7_vgpr8_vgpr9 = IMPLICIT_DEF
+    $vgpr10_vgpr11_vgpr12_vgpr13_vgpr14_vgpr15_vgpr16_vgpr17 = IMPLICIT_DEF
+    SI_SPILL_AV96_SAVE $agpr0_agpr1_agpr2, %stack.0, $sgpr32, 0, implicit $exec :: (store (s96) into %stack.0, align 4, addrspace 5)
+    S_ENDPGM 0
+...