mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-23 19:23:23 +01:00
8f662721b9
Summary: An outstanding load with same destination sgpr as call could cause PC to be updated with junk value on return. Reviewers: arsenm, rampitec Reviewed By: arsenm Subscribers: kzhuravl, jvesely, wdng, nhaehnle, yaxunl, dstuttard, tpr, t-tye, hiraditya, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D69474
54 lines
2.5 KiB
YAML
54 lines
2.5 KiB
YAML
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
|
|
# RUN: llc -march=amdgcn -mcpu=gfx900 -verify-machineinstrs -run-pass=si-insert-waitcnts %s -o - | FileCheck -check-prefix=GCN %s
|
|
|
|
# $sgpr30_sgpr31 will hold the return address. We need a waitcnt before SI_CALL so
|
|
# that the return address is not clobbered in the callee by the outstanding load.
|
|
|
|
--- |
|
|
define amdgpu_kernel void @call_waw_waitcnt() #0 {
|
|
%1 = call i32 @func()
|
|
ret void
|
|
}
|
|
|
|
declare hidden i32 @func() #0
|
|
|
|
attributes #0 = { nounwind }
|
|
...
|
|
|
|
---
|
|
name: call_waw_waitcnt
|
|
tracksRegLiveness: true
|
|
body: |
|
|
bb.0:
|
|
liveins: $sgpr4_sgpr5, $sgpr7, $sgpr0_sgpr1_sgpr2_sgpr3
|
|
|
|
; GCN-LABEL: name: call_waw_waitcnt
|
|
; GCN: liveins: $sgpr4_sgpr5, $sgpr7, $sgpr0_sgpr1_sgpr2_sgpr3
|
|
; GCN: S_WAITCNT 0
|
|
; GCN: $sgpr30_sgpr31 = S_LOAD_DWORDX2_IMM $sgpr4_sgpr5, 0, 0, 0
|
|
; GCN: $sgpr33 = S_MOV_B32 killed $sgpr7
|
|
; GCN: $flat_scr_lo = S_ADD_U32 killed $sgpr4, $sgpr33, implicit-def $scc
|
|
; GCN: $flat_scr_hi = S_ADDC_U32 killed $sgpr5, 0, implicit-def $scc, implicit killed $scc
|
|
; GCN: BUNDLE implicit-def $sgpr4_sgpr5, implicit-def $sgpr4, implicit-def $sgpr5, implicit-def $scc {
|
|
; GCN: $sgpr4_sgpr5 = S_GETPC_B64
|
|
; GCN: $sgpr4 = S_ADD_U32 internal $sgpr4, target-flags(amdgpu-rel32-lo) @func + 4, implicit-def $scc
|
|
; GCN: $sgpr5 = S_ADDC_U32 internal $sgpr5, target-flags(amdgpu-rel32-hi) @func + 4, implicit-def $scc, implicit internal $scc
|
|
; GCN: }
|
|
; GCN: $sgpr32 = S_MOV_B32 $sgpr33
|
|
; GCN: S_WAITCNT 49279
|
|
; GCN: dead $sgpr30_sgpr31 = SI_CALL killed renamable $sgpr4_sgpr5, @func, csr_amdgpu_highregs, implicit $sgpr0_sgpr1_sgpr2_sgpr3, implicit-def dead $vgpr0
|
|
; GCN: S_ENDPGM 0
|
|
$sgpr30_sgpr31 = S_LOAD_DWORDX2_IMM $sgpr4_sgpr5, 0, 0, 0
|
|
$sgpr33 = S_MOV_B32 killed $sgpr7
|
|
$flat_scr_lo = S_ADD_U32 killed $sgpr4, $sgpr33, implicit-def $scc
|
|
$flat_scr_hi = S_ADDC_U32 killed $sgpr5, 0, implicit-def $scc, implicit killed $scc
|
|
BUNDLE implicit-def $sgpr4_sgpr5, implicit-def $sgpr4, implicit-def $sgpr5, implicit-def $scc {
|
|
$sgpr4_sgpr5 = S_GETPC_B64
|
|
$sgpr4 = S_ADD_U32 internal $sgpr4, target-flags(amdgpu-rel32-lo) @func + 4, implicit-def $scc
|
|
$sgpr5 = S_ADDC_U32 internal $sgpr5, target-flags(amdgpu-rel32-hi) @func + 4, implicit-def $scc, implicit internal $scc
|
|
}
|
|
$sgpr32 = S_MOV_B32 $sgpr33
|
|
dead $sgpr30_sgpr31 = SI_CALL killed renamable $sgpr4_sgpr5, @func, csr_amdgpu_highregs, implicit $sgpr0_sgpr1_sgpr2_sgpr3, implicit-def dead $vgpr0
|
|
S_ENDPGM 0
|
|
...
|