1 # RUN: llc -march=amdgcn -verify-machineinstrs -run-pass si-load-store-opt -o - %s | FileCheck %s
3 # Check that SILoadStoreOptimizer honors physregs defs/uses between moved
6 # The following IR snippet would usually be optimized by the peephole optimizer.
7 # However, an equivalent situation can occur with buffer instructions as well.
9 # CHECK-LABEL: name: scc_def_and_use_no_dependency
14 name: scc_def_and_use_no_dependency
19 liveins: $vgpr0, $sgpr0
21 %1:vgpr_32 = COPY $vgpr0
22 %10:sgpr_32 = COPY $sgpr0
25 %2:vgpr_32 = DS_READ_B32 %1, 0, 0, implicit $m0, implicit $exec :: (load 4)
27 %11:sgpr_32 = S_ADD_U32 %10, 4, implicit-def $scc
28 %12:sgpr_32 = S_ADDC_U32 %10, 0, implicit-def dead $scc, implicit $scc
30 %3:vgpr_32 = DS_READ_B32 %1, 64, 0, implicit $m0, implicit $exec :: (load 4)
35 # CHECK-LABEL: name: scc_def_and_use_dependency
40 name: scc_def_and_use_dependency
46 liveins: $vgpr0, $sgpr0
48 %1:vgpr_32 = COPY $vgpr0
49 %10:sgpr_32 = COPY $sgpr0
52 %2:vgpr_32 = DS_READ_B32 %1, 0, 0, implicit $m0, implicit $exec :: (load 4)
53 %20:sgpr_32 = V_READFIRSTLANE_B32 %2, implicit $exec
55 %21:sgpr_32 = S_ADD_U32 %20, 4, implicit-def $scc
56 ; The S_ADDC_U32 depends on the first DS_READ_B32 only via SCC
57 %11:sgpr_32 = S_ADDC_U32 %10, 0, implicit-def dead $scc, implicit $scc
59 %3:vgpr_32 = DS_READ_B32 %1, 64, 0, implicit $m0, implicit $exec :: (load 4)