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Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
# RUN: llc -march=hexagon -run-pass branch-folder %s -o - -verify-machineinstrs | FileCheck %s
# Branch folding will perform tail merging of bb.1 and bb.2, and bb.2 will
# become the common tail. The use of R0 in bb.2 is <undef> while the
# corresponding use in bb.1 is not. The common tail will have the <undef>
# flag removed, which will cause R0 to become a live-in to bb.2. The problem
# is that R0 is not live-out from all predecessors of bb.2, namely is not
# live-out from bb.0. To remedy that, the branch folder should add an
# IMPLICIT_DEF to that block.
# CHECK-LABEL: name: func0
# CHECK-LABEL: bb.0:
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
# CHECK: $r0 = IMPLICIT_DEF
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
# CHECK-LABEL: bb.1:
# CHECK-LABEL: bb.2:
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
# CHECK: liveins: $r0
# CHECK: PS_storerhabs 0, $r0
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
# CHECK: PS_jmpret
---
name: func0
tracksRegLiveness: true
body: |
bb.0:
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
liveins: $r31
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
successors: %bb.1, %bb.2
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
J2_jumpt undef $p0, %bb.2, implicit-def $pc
J2_jump %bb.1, implicit-def $pc
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
bb.1:
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
liveins: $r31
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
successors: %bb.3
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
$r0 = L2_loadruh_io undef $r1, 0
PS_storerhabs 0, killed $r0
J2_jump %bb.3, implicit-def $pc
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
bb.2:
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
liveins: $r31
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
successors: %bb.3
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
PS_storerhabs 0, undef $r0
J2_jump %bb.3, implicit-def $pc
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
bb.3:
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
liveins: $r31
PS_jmpret killed $r31, implicit-def $pc
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
...
---
# CHECK-LABEL: name: func1
# CHECK-LABEL: bb.1:
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
# CHECK: $r0 = IMPLICIT_DEF
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
# CHECK-LABEL: bb.2:
# CHECK-LABEL: bb.3:
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
# CHECK: liveins: $r0
# CHECK: PS_storerhabs 0, killed $r0
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
# CHECK: PS_jmpret
name: func1
tracksRegLiveness: true
body: |
bb.0:
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
liveins: $r31
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
successors: %bb.1, %bb.2
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
J2_jumpt undef $p0, %bb.2, implicit-def $pc
J2_jump %bb.1, implicit-def $pc
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
bb.1:
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
liveins: $r31
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
successors: %bb.3
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
$r1 = A2_tfrsi 1
PS_storerhabs 0, undef $r0
$r0 = A2_tfrsi 1
J2_jump %bb.3, implicit-def $pc
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
bb.2:
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
liveins: $r31
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
successors: %bb.3
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
$r0 = L2_loadruh_io undef $r1, 0
PS_storerhabs 0, killed $r0
$r0 = A2_tfrsi 1
J2_jump %bb.3, implicit-def $pc
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
bb.3:
Followup on Proposal to move MIR physical register namespace to '$' sigil. Discussed here: http://lists.llvm.org/pipermail/llvm-dev/2018-January/120320.html In preparation for adding support for named vregs we are changing the sigil for physical registers in MIR to '$' from '%'. This will prevent name clashes of named physical register with named vregs. llvm-svn: 323922
2018-02-01 06:04:26 +08:00
liveins: $r31
PS_jmpret killed $r31, implicit undef $r0, implicit-def $pc
Insert IMPLICIT_DEFS for undef uses in tail merging Tail merging can convert an undef use into a normal one when creating a common tail. Doing so can make the register live out from a block which previously contained the undef use. To keep the liveness up-to-date, insert IMPLICIT_DEFs in such blocks when necessary. To enable this patch the computeLiveIns() function which used to compute live-ins for a block and set them immediately is split into new functions: - computeLiveIns() just computes the live-ins in a LivePhysRegs set. - addLiveIns() applies the live-ins to a block live-in list. - computeAndAddLiveIns() is a convenience function combining the other two functions and behaving like computeLiveIns() before this patch. Based on a patch by Krzysztof Parzyszek <kparzysz@codeaurora.org> Differential Revision: https://reviews.llvm.org/D37034 llvm-svn: 312668
2017-09-07 04:45:24 +08:00
...