| # RUN: llc -march=amdgcn -run-pass si-fold-operands -verify-machineinstrs %s -o - | FileCheck -check-prefix=GCN %s |
| |
| # GCN-LABEL: name: fold-imm-copy |
| # GCN: [[SREG:%[0-9]+]]:sreg_32_xm0 = S_MOV_B32 65535 |
| # GCN: V_AND_B32_e32 [[SREG]] |
| |
| --- |
| name: fold-imm-copy |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| liveins: $vgpr0, $sgpr0_sgpr1 |
| %0:vgpr_32 = COPY $vgpr0 |
| %1:sgpr_64 = COPY $sgpr0_sgpr1 |
| %2:sgpr_128 = S_LOAD_DWORDX4_IMM %1, 9, 0 |
| %3:sreg_32_xm0 = S_MOV_B32 2 |
| %4:vgpr_32 = V_LSHLREV_B32_e64 killed %3, %0, implicit $exec |
| %5:vgpr_32 = V_MOV_B32_e32 0, implicit $exec |
| %6:vreg_64 = REG_SEQUENCE killed %4, %subreg.sub0, killed %5, %subreg.sub1 |
| %7:vgpr_32 = BUFFER_LOAD_DWORD_ADDR64 %6, %2, 0, 4, 0, 0, 0, implicit $exec |
| %8:sreg_32_xm0 = S_MOV_B32 65535 |
| %9:vgpr_32 = COPY %8 |
| %10:vgpr_32 = V_AND_B32_e32 %7, %9, implicit $exec |
| ... |
| |
| --- |
| # GCN-LABEL: name: no_extra_fold_on_same_opnd |
| # The first XOR needs commuting to fold that immediate operand. |
| # GCN: V_XOR_B32_e32 0, %1 |
| # GCN: V_XOR_B32_e32 %2, %4.sub0 |
| name: no_extra_fold_on_same_opnd |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| %0:vgpr_32 = IMPLICIT_DEF |
| %1:vgpr_32 = IMPLICIT_DEF |
| %2:vgpr_32 = IMPLICIT_DEF |
| %3:vgpr_32 = V_MOV_B32_e32 0, implicit $exec |
| %4:vreg_64 = REG_SEQUENCE killed %0, %subreg.sub0, killed %3, %subreg.sub1 |
| %5:vgpr_32 = V_XOR_B32_e32 %1, %4.sub1, implicit $exec |
| %6:vgpr_32 = V_XOR_B32_e32 %2, %4.sub0, implicit $exec |
| ... |
| |
| --- |
| |
| # Make sure the subreg index is not reinterpreted when folding |
| # immediates |
| # |
| # GCN-LABEL: name: clear_subreg_imm_fold{{$}} |
| # GCN: %1:sgpr_32 = S_MOV_B32 4294967288 |
| # GCN: %2:sgpr_32 = S_MOV_B32 4294967295 |
| name: clear_subreg_imm_fold |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| %0:sreg_64 = S_MOV_B64 -8 |
| %1:sgpr_32 = COPY %0.sub0 |
| %2:sgpr_32 = COPY %0.sub1 |
| S_ENDPGM 0, implicit %1, implicit %2 |
| |
| ... |
| |
| # GCN-LABEL: name: no_fold_imm_into_m0{{$}} |
| # GCN: %0:sreg_32 = S_MOV_B32 -8 |
| # GCN-NEXT: $m0 = COPY %0 |
| |
| --- |
| name: no_fold_imm_into_m0 |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| %0:sreg_32 = S_MOV_B32 -8 |
| $m0 = COPY %0 |
| S_ENDPGM 0, implicit $m0 |
| |
| ... |
| |
| # GCN-LABEL: name: fold_sgpr_imm_to_vgpr_copy{{$}} |
| # GCN: $vgpr0 = V_MOV_B32_e32 -8, implicit $exec |
| --- |
| name: fold_sgpr_imm_to_vgpr_copy |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| %0:sreg_32 = S_MOV_B32 -8 |
| $vgpr0 = COPY %0 |
| S_ENDPGM 0, implicit $vgpr0 |
| |
| ... |
| |
| # The users of $vgpr1 should not be visited for further immediate |
| # folding. |
| |
| # GCN-LABEL: name: no_fold_physreg_users_vgpr{{$}} |
| # GCN: $vgpr1 = V_MOV_B32_e32 0, implicit $exec |
| # GCN-NEXT: S_NOP 0, implicit-def $vgpr1 |
| # GCN-NEXT: %2:vgpr_32 = COPY $vgpr1 |
| # GCN-NEXT: $vgpr2 = COPY %2 |
| --- |
| name: no_fold_physreg_users_vgpr |
| tracksRegLiveness: true |
| body: | |
| bb.0: |
| %0:sreg_32 = S_MOV_B32 0 |
| %1:vgpr_32 = COPY %0 |
| $vgpr1 = COPY %0 |
| S_NOP 0, implicit-def $vgpr1 |
| %2:vgpr_32 = COPY $vgpr1 |
| $vgpr2 = COPY %2 |
| S_ENDPGM 0 |
| |
| ... |