test/CodeGen/AMDGPU/twoaddr-bundle.mir

# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py UTC_ARGS: --version 6
# RUN: llc -mtriple=amdgcn -mcpu=gfx1200 %s --passes=two-address-instruction -verify-each -o - | FileCheck --check-prefixes=GCN %s

# Exercise very basic handling of BUNDLE'd instructions by the two-address-instruction pass.

# This test is an example where it is best to keep the two-address instruction
# and resolve the tie with a COPY that is expected to be coalesced.
---
name:            test_fmac_bundle
body:             |
  bb.0:

    ; GCN-LABEL: name: test_fmac_bundle
    ; GCN: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
    ; GCN-NEXT: [[COPY1:%[0-9]+]]:vgpr_32 = COPY $vgpr1
    ; GCN-NEXT: [[V_ADD_U32_e64_:%[0-9]+]]:vgpr_32 = V_ADD_U32_e64 [[COPY]], [[COPY1]], 0, implicit $exec
    ; GCN-NEXT: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN-NEXT: [[DEF1:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN-NEXT: [[COPY2:%[0-9]+]]:vgpr_32 = COPY [[V_ADD_U32_e64_]]
    ; GCN-NEXT: BUNDLE implicit-def [[COPY2]], implicit [[DEF]], implicit [[DEF1]], implicit [[COPY2]](tied-def 0), implicit $mode, implicit $exec {
    ; GCN-NEXT:   [[COPY2:%[0-9]+]]:vgpr_32 = V_FMAC_F32_e32 killed [[DEF]], killed [[DEF1]], killed [[COPY2]], implicit $mode, implicit $exec
    ; GCN-NEXT: }
    %10:vgpr_32 = COPY $vgpr0
    %11:vgpr_32 = COPY $vgpr1
    %2:vgpr_32 = V_ADD_U32_e64 %10, %11, 0, implicit $exec
    %0:vgpr_32 = IMPLICIT_DEF
    %1:vgpr_32 = IMPLICIT_DEF
    BUNDLE implicit-def %3:vgpr_32, implicit %0, implicit %1, implicit killed %2(tied-def 0), implicit $mode, implicit $exec {
      %3:vgpr_32 = V_FMAC_F32_e32 killed %0, killed %1, killed %2, implicit $mode, implicit $exec
    }

...

# This test is an example where conversion to three-address form is beneficial.
---
name:            test_fmac_reuse_bundle
body:             |
  bb.0:

    ; GCN-LABEL: name: test_fmac_reuse_bundle
    ; GCN: [[COPY:%[0-9]+]]:vgpr_32 = COPY $vgpr0
    ; GCN-NEXT: [[DEF:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN-NEXT: [[DEF1:%[0-9]+]]:vgpr_32 = IMPLICIT_DEF
    ; GCN-NEXT: BUNDLE implicit-def %3, implicit [[DEF]], implicit [[DEF1]], implicit [[COPY]], implicit $mode, implicit $exec {
    ; GCN-NEXT:   [[V_FMA_F32_e64_:%[0-9]+]]:vgpr_32 = V_FMA_F32_e64 0, killed [[DEF]], 0, killed [[DEF1]], 0, killed [[COPY]], 0, 0, implicit $mode, implicit $exec
    ; GCN-NEXT: }
    ; GCN-NEXT: [[V_ADD_U32_e64_:%[0-9]+]]:vgpr_32 = V_ADD_U32_e64 [[V_FMA_F32_e64_]], [[COPY]], 0, implicit $exec
    %2:vgpr_32 = COPY $vgpr0
    %0:vgpr_32 = IMPLICIT_DEF
    %1:vgpr_32 = IMPLICIT_DEF
    BUNDLE implicit-def %3:vgpr_32, implicit %0, implicit %1, implicit %2(tied-def 0), implicit $mode, implicit $exec {
      %3:vgpr_32 = V_FMAC_F32_e32 killed %0, killed %1, killed %2, implicit $mode, implicit $exec
    }
    %4:vgpr_32 = V_ADD_U32_e64 %3, %2, 0, implicit $exec

...