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|
# 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, 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, 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
...
|
