llvm/test/CodeGen/Thumb2/LowOverheadLoops/livereg-no-loop-def.mir - third_party/github.com/llvm/llvm-project - Git at Google

 # NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
 # RUN: llc -mtriple=thumbv8.1m.main -mattr=+mve -run-pass=arm-low-overhead-loops %s -o - --verify-machineinstrs | FileCheck %s

 --- |
   define dso_local <4 x i32> @exit_liveout(i16* nocapture readonly %a, i16* nocapture readonly %b, i32* %c, i32 %N, <4 x i32> %pass) {
   entry:
     %cmp9 = icmp eq i32 %N, 0
     %tmp = add i32 %N, 3
     %tmp1 = lshr i32 %tmp, 2
     %tmp2 = shl nuw i32 %tmp1, 2
     %tmp3 = add i32 %tmp2, -4
     %tmp4 = lshr i32 %tmp3, 2
     %tmp5 = add nuw nsw i32 %tmp4, 1
     br i1 %cmp9, label %exit, label %vector.ph

   vector.ph:                                        ; preds = %entry
     call void @llvm.set.loop.iterations.i32(i32 %tmp5)
     br label %vector.body

   vector.body:                                      ; preds = %vector.body, %vector.ph
     %lsr.iv1 = phi i32 [ %lsr.iv.next, %vector.body ], [ %tmp5, %vector.ph ]
     %lsr.iv18 = phi i16* [ %scevgep19, %vector.body ], [ %b, %vector.ph ]
     %lsr.iv20 = phi i32* [ %scevgep20, %vector.body ], [ %c, %vector.ph ]
     %lsr.iv = phi i16* [ %scevgep, %vector.body ], [ %a, %vector.ph ]
     %vec.phi = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %tmp13, %vector.body ]
     %tmp7 = phi i32 [ %N, %vector.ph ], [ %tmp9, %vector.body ]
     %lsr.iv17 = bitcast i16* %lsr.iv to <4 x i16>*
     %lsr.store = bitcast i32* %lsr.iv20 to <4 x i32>*
     %lsr.iv1820 = bitcast i16* %lsr.iv18 to <4 x i16>*
     %tmp8 = call <4 x i1> @llvm.arm.mve.vctp32(i32 %tmp7)
     %tmp9 = sub i32 %tmp7, 4
     %wide.masked.load = call <4 x i16> @llvm.masked.load.v4i16.p0v4i16(<4 x i16>* %lsr.iv17, i32 2, <4 x i1> %tmp8, <4 x i16> undef)
     %tmp10 = sext <4 x i16> %wide.masked.load to <4 x i32>
     %wide.masked.load14 = call <4 x i16> @llvm.masked.load.v4i16.p0v4i16(<4 x i16>* %lsr.iv1820, i32 2, <4 x i1> %tmp8, <4 x i16> undef)
     %tmp11 = sext <4 x i16> %wide.masked.load14 to <4 x i32>
     %tmp12 = mul nsw <4 x i32> %tmp11, %tmp10
     %tmp13 = add <4 x i32> %tmp12, %vec.phi
     call void @llvm.masked.store.v4i32.p0v4i32(<4 x i32> %tmp13, <4 x i32>* %lsr.store, i32 4, <4 x i1> %tmp8)
     %scevgep = getelementptr i16, i16* %lsr.iv, i32 4
     %scevgep19 = getelementptr i16, i16* %lsr.iv18, i32 4
     %scevgep20 = getelementptr i32, i32* %lsr.iv20, i32 4
     %tmp14 = call i32 @llvm.loop.decrement.reg.i32.i32.i32(i32 %lsr.iv1, i32 1)
     %tmp15 = icmp ne i32 %tmp14, 0
     %lsr.iv.next = add nsw i32 %lsr.iv1, -1
     br i1 %tmp15, label %vector.body, label %exit

   exit:                                             ; preds = %vector.body, %entry
     ret <4 x i32> %pass
   }

   declare <4 x i16> @llvm.masked.load.v4i16.p0v4i16(<4 x i16>*, i32 immarg, <4 x i1>, <4 x i16>)
   declare void @llvm.masked.store.v4i32.p0v4i32(<4 x i32>, <4 x i32>*, i32 immarg, <4 x i1>)
   declare void @llvm.set.loop.iterations.i32(i32)
   declare i32 @llvm.loop.decrement.reg.i32.i32.i32(i32, i32)
   declare <4 x i1> @llvm.arm.mve.vctp32(i32)

 ...
 ---
 name:            exit_liveout
 alignment:       2
 tracksRegLiveness: true
 registers:       []
 liveins:
   - { reg: '$r0', virtual-reg: '' }
   - { reg: '$r1', virtual-reg: '' }
   - { reg: '$r2', virtual-reg: '' }
   - { reg: '$r3', virtual-reg: '' }
 frameInfo:
   stackSize:       8
   offsetAdjustment: 0
   maxAlignment:    8
 fixedStack:
   - { id: 0, type: default, offset: 0, size: 16, alignment: 8, stack-id: default,
       isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
       debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
 stack:
   - { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,
       stack-id: default, callee-saved-register: '$lr', callee-saved-restored: false,
       debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
   - { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,
       stack-id: default, callee-saved-register: '$r4', callee-saved-restored: true,
       debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
 callSites:       []
 constants:       []
 machineFunctionInfo: {}
 body:             |
   ; CHECK-LABEL: name: exit_liveout
   ; CHECK: bb.0.entry:
   ; CHECK:   successors: %bb.3(0x30000000), %bb.1(0x50000000)
   ; CHECK:   liveins: $lr, $r0, $r1, $r2, $r3, $r4
   ; CHECK:   frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r4, killed $lr, implicit-def $sp, implicit $sp
   ; CHECK:   frame-setup CFI_INSTRUCTION def_cfa_offset 8
   ; CHECK:   frame-setup CFI_INSTRUCTION offset $lr, -4
   ; CHECK:   frame-setup CFI_INSTRUCTION offset $r4, -8
   ; CHECK:   renamable $r12 = t2ADDri $sp, 8, 14 /* CC::al */, $noreg, $noreg
   ; CHECK:   renamable $q0 = MVE_VLDRWU32 killed renamable $r12, 0, 0, $noreg :: (load 16 from %fixed-stack.0, align 8)
   ; CHECK:   tCBZ $r3, %bb.3
   ; CHECK: bb.1.vector.ph:
   ; CHECK:   successors: %bb.2(0x80000000)
   ; CHECK:   liveins: $q0, $r0, $r1, $r2, $r3
   ; CHECK:   renamable $q1 = MVE_VMOVimmi32 0, 0, $noreg, undef renamable $q1
   ; CHECK:   $lr = MVE_DLSTP_32 killed renamable $r3
   ; CHECK: bb.2.vector.body:
   ; CHECK:   successors: %bb.2(0x7c000000), %bb.3(0x04000000)
   ; CHECK:   liveins: $lr, $q0, $q1, $r0, $r1, $r2
   ; CHECK:   renamable $r0, renamable $q2 = MVE_VLDRHS32_post killed renamable $r0, 8, 0, $noreg :: (load 8 from %ir.lsr.iv17, align 2)
   ; CHECK:   renamable $r1, renamable $q3 = MVE_VLDRHS32_post killed renamable $r1, 8, 0, $noreg :: (load 8 from %ir.lsr.iv1820, align 2)
   ; CHECK:   renamable $q2 = nsw MVE_VMULi32 killed renamable $q3, killed renamable $q2, 0, $noreg, undef renamable $q2
   ; CHECK:   renamable $q1 = MVE_VADDi32 killed renamable $q2, killed renamable $q1, 0, $noreg, undef renamable $q1
   ; CHECK:   renamable $r2 = MVE_VSTRWU32_post renamable $q1, killed renamable $r2, 16, 0, killed $noreg :: (store 16 into %ir.lsr.store, align 4)
   ; CHECK:   $lr = MVE_LETP killed renamable $lr, %bb.2
   ; CHECK: bb.3.exit:
   ; CHECK:   liveins: $q0
   ; CHECK:   renamable $r0, renamable $r1 = VMOVRRD renamable $d0, 14 /* CC::al */, $noreg
   ; CHECK:   renamable $r2, renamable $r3 = VMOVRRD killed renamable $d1, 14 /* CC::al */, $noreg, implicit killed $q0
   ; CHECK:   tPOP_RET 14 /* CC::al */, $noreg, def $r4, def $pc, implicit killed $r0, implicit killed $r1, implicit killed $r2, implicit killed $r3
   bb.0.entry:
     successors: %bb.3(0x30000000), %bb.1(0x50000000)
     liveins: $r0, $r1, $r2, $r3, $r4, $lr

     frame-setup tPUSH 14, $noreg, killed $r4, killed $lr, implicit-def $sp, implicit $sp
     frame-setup CFI_INSTRUCTION def_cfa_offset 8
     frame-setup CFI_INSTRUCTION offset $lr, -4
     frame-setup CFI_INSTRUCTION offset $r4, -8
     renamable $r12 = t2ADDri $sp, 8, 14, $noreg, $noreg
     renamable $q0 = MVE_VLDRWU32 killed renamable $r12, 0, 0, $noreg :: (load 16 from %fixed-stack.0, align 8)
     tCBZ $r3, %bb.3

   bb.1.vector.ph:
     successors: %bb.2(0x80000000)
     liveins: $q0, $r0, $r1, $r2, $r3

     renamable $r12 = t2ADDri renamable $r3, 3, 14, $noreg, $noreg
     renamable $lr = t2MOVi 1, 14, $noreg, $noreg
     renamable $r12 = t2BICri killed renamable $r12, 3, 14, $noreg, $noreg
     renamable $q1 = MVE_VMOVimmi32 0, 0, $noreg, undef renamable $q1
     renamable $r12 = t2SUBri killed renamable $r12, 4, 14, $noreg, $noreg
     renamable $r4 = nuw nsw t2ADDrs killed renamable $lr, killed renamable $r12, 19, 14, $noreg, $noreg
     t2DoLoopStart renamable $r4
     $r12 = tMOVr killed $r4, 14, $noreg

   bb.2.vector.body:
     successors: %bb.2(0x7c000000), %bb.3(0x04000000)
     liveins: $q0, $q1, $r0, $r1, $r2, $r3, $r12

     renamable $vpr = MVE_VCTP32 renamable $r3, 0, $noreg
     MVE_VPST 4, implicit $vpr
     renamable $r0, renamable $q2 = MVE_VLDRHS32_post killed renamable $r0, 8, 1, renamable $vpr :: (load 8 from %ir.lsr.iv17, align 2)
     renamable $r1, renamable $q3 = MVE_VLDRHS32_post killed renamable $r1, 8, 1, renamable $vpr :: (load 8 from %ir.lsr.iv1820, align 2)
     $lr = tMOVr $r12, 14, $noreg
     renamable $q2 = nsw MVE_VMULi32 killed renamable $q3, killed renamable $q2, 0, $noreg, undef renamable $q2
     renamable $r12 = nsw t2SUBri killed $r12, 1, 14, $noreg, $noreg
     renamable $r3, dead $cpsr = tSUBi8 killed renamable $r3, 4, 14, $noreg
     renamable $q1 = MVE_VADDi32 killed renamable $q2, killed renamable $q1, 0, $noreg, undef renamable $q1
     renamable $lr = t2LoopDec killed renamable $lr, 1
     MVE_VPST 8, implicit $vpr
     renamable $r2 = MVE_VSTRWU32_post renamable $q1, killed renamable $r2, 16, 1, killed renamable $vpr :: (store 16 into %ir.lsr.store, align 4)
     t2LoopEnd killed renamable $lr, %bb.2, implicit-def dead $cpsr
     tB %bb.3, 14, $noreg

   bb.3.exit:
     liveins: $q0

     renamable $r0, renamable $r1 = VMOVRRD renamable $d0, 14, $noreg
     renamable $r2, renamable $r3 = VMOVRRD killed renamable $d1, 14, $noreg, implicit $q0
     tPOP_RET 14, $noreg, def $r4, def $pc, implicit killed $r0, implicit killed $r1, implicit killed $r2, implicit killed $r3

 ...
	# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
	# RUN: llc -mtriple=thumbv8.1m.main -mattr=+mve -run-pass=arm-low-overhead-loops %s -o - --verify-machineinstrs \| FileCheck %s

	--- \|
	define dso_local <4 x i32> @exit_liveout(i16* nocapture readonly %a, i16* nocapture readonly %b, i32* %c, i32 %N, <4 x i32> %pass) {
	entry:
	%cmp9 = icmp eq i32 %N, 0
	%tmp = add i32 %N, 3
	%tmp1 = lshr i32 %tmp, 2
	%tmp2 = shl nuw i32 %tmp1, 2
	%tmp3 = add i32 %tmp2, -4
	%tmp4 = lshr i32 %tmp3, 2
	%tmp5 = add nuw nsw i32 %tmp4, 1
	br i1 %cmp9, label %exit, label %vector.ph

	vector.ph: ; preds = %entry
	call void @llvm.set.loop.iterations.i32(i32 %tmp5)
	br label %vector.body

	vector.body: ; preds = %vector.body, %vector.ph
	%lsr.iv1 = phi i32 [ %lsr.iv.next, %vector.body ], [ %tmp5, %vector.ph ]
	%lsr.iv18 = phi i16* [ %scevgep19, %vector.body ], [ %b, %vector.ph ]
	%lsr.iv20 = phi i32* [ %scevgep20, %vector.body ], [ %c, %vector.ph ]
	%lsr.iv = phi i16* [ %scevgep, %vector.body ], [ %a, %vector.ph ]
	%vec.phi = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %tmp13, %vector.body ]
	%tmp7 = phi i32 [ %N, %vector.ph ], [ %tmp9, %vector.body ]
	%lsr.iv17 = bitcast i16* %lsr.iv to <4 x i16>*
	%lsr.store = bitcast i32* %lsr.iv20 to <4 x i32>*
	%lsr.iv1820 = bitcast i16* %lsr.iv18 to <4 x i16>*
	%tmp8 = call <4 x i1> @llvm.arm.mve.vctp32(i32 %tmp7)
	%tmp9 = sub i32 %tmp7, 4
	%wide.masked.load = call <4 x i16> @llvm.masked.load.v4i16.p0v4i16(<4 x i16>* %lsr.iv17, i32 2, <4 x i1> %tmp8, <4 x i16> undef)
	%tmp10 = sext <4 x i16> %wide.masked.load to <4 x i32>
	%wide.masked.load14 = call <4 x i16> @llvm.masked.load.v4i16.p0v4i16(<4 x i16>* %lsr.iv1820, i32 2, <4 x i1> %tmp8, <4 x i16> undef)
	%tmp11 = sext <4 x i16> %wide.masked.load14 to <4 x i32>
	%tmp12 = mul nsw <4 x i32> %tmp11, %tmp10
	%tmp13 = add <4 x i32> %tmp12, %vec.phi
	call void @llvm.masked.store.v4i32.p0v4i32(<4 x i32> %tmp13, <4 x i32>* %lsr.store, i32 4, <4 x i1> %tmp8)
	%scevgep = getelementptr i16, i16* %lsr.iv, i32 4
	%scevgep19 = getelementptr i16, i16* %lsr.iv18, i32 4
	%scevgep20 = getelementptr i32, i32* %lsr.iv20, i32 4
	%tmp14 = call i32 @llvm.loop.decrement.reg.i32.i32.i32(i32 %lsr.iv1, i32 1)
	%tmp15 = icmp ne i32 %tmp14, 0
	%lsr.iv.next = add nsw i32 %lsr.iv1, -1
	br i1 %tmp15, label %vector.body, label %exit

	exit: ; preds = %vector.body, %entry
	ret <4 x i32> %pass
	}

	declare <4 x i16> @llvm.masked.load.v4i16.p0v4i16(<4 x i16>*, i32 immarg, <4 x i1>, <4 x i16>)
	declare void @llvm.masked.store.v4i32.p0v4i32(<4 x i32>, <4 x i32>*, i32 immarg, <4 x i1>)
	declare void @llvm.set.loop.iterations.i32(i32)
	declare i32 @llvm.loop.decrement.reg.i32.i32.i32(i32, i32)
	declare <4 x i1> @llvm.arm.mve.vctp32(i32)

	...
	---
	name: exit_liveout
	alignment: 2
	tracksRegLiveness: true
	registers: []
	liveins:
	- { reg: '$r0', virtual-reg: '' }
	- { reg: '$r1', virtual-reg: '' }
	- { reg: '$r2', virtual-reg: '' }
	- { reg: '$r3', virtual-reg: '' }
	frameInfo:
	stackSize: 8
	offsetAdjustment: 0
	maxAlignment: 8
	fixedStack:
	- { id: 0, type: default, offset: 0, size: 16, alignment: 8, stack-id: default,
	isImmutable: true, isAliased: false, callee-saved-register: '', callee-saved-restored: true,
	debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
	stack:
	- { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,
	stack-id: default, callee-saved-register: '$lr', callee-saved-restored: false,
	debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
	- { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,
	stack-id: default, callee-saved-register: '$r4', callee-saved-restored: true,
	debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
	callSites: []
	constants: []
	machineFunctionInfo: {}
	body: \|
	; CHECK-LABEL: name: exit_liveout
	; CHECK: bb.0.entry:
	; CHECK: successors: %bb.3(0x30000000), %bb.1(0x50000000)
	; CHECK: liveins: $lr, $r0, $r1, $r2, $r3, $r4
	; CHECK: frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r4, killed $lr, implicit-def $sp, implicit $sp
	; CHECK: frame-setup CFI_INSTRUCTION def_cfa_offset 8
	; CHECK: frame-setup CFI_INSTRUCTION offset $lr, -4
	; CHECK: frame-setup CFI_INSTRUCTION offset $r4, -8
	; CHECK: renamable $r12 = t2ADDri $sp, 8, 14 /* CC::al */, $noreg, $noreg
	; CHECK: renamable $q0 = MVE_VLDRWU32 killed renamable $r12, 0, 0, $noreg :: (load 16 from %fixed-stack.0, align 8)
	; CHECK: tCBZ $r3, %bb.3
	; CHECK: bb.1.vector.ph:
	; CHECK: successors: %bb.2(0x80000000)
	; CHECK: liveins: $q0, $r0, $r1, $r2, $r3
	; CHECK: renamable $q1 = MVE_VMOVimmi32 0, 0, $noreg, undef renamable $q1
	; CHECK: $lr = MVE_DLSTP_32 killed renamable $r3
	; CHECK: bb.2.vector.body:
	; CHECK: successors: %bb.2(0x7c000000), %bb.3(0x04000000)
	; CHECK: liveins: $lr, $q0, $q1, $r0, $r1, $r2
	; CHECK: renamable $r0, renamable $q2 = MVE_VLDRHS32_post killed renamable $r0, 8, 0, $noreg :: (load 8 from %ir.lsr.iv17, align 2)
	; CHECK: renamable $r1, renamable $q3 = MVE_VLDRHS32_post killed renamable $r1, 8, 0, $noreg :: (load 8 from %ir.lsr.iv1820, align 2)
	; CHECK: renamable $q2 = nsw MVE_VMULi32 killed renamable $q3, killed renamable $q2, 0, $noreg, undef renamable $q2
	; CHECK: renamable $q1 = MVE_VADDi32 killed renamable $q2, killed renamable $q1, 0, $noreg, undef renamable $q1
	; CHECK: renamable $r2 = MVE_VSTRWU32_post renamable $q1, killed renamable $r2, 16, 0, killed $noreg :: (store 16 into %ir.lsr.store, align 4)
	; CHECK: $lr = MVE_LETP killed renamable $lr, %bb.2
	; CHECK: bb.3.exit:
	; CHECK: liveins: $q0
	; CHECK: renamable $r0, renamable $r1 = VMOVRRD renamable $d0, 14 /* CC::al */, $noreg
	; CHECK: renamable $r2, renamable $r3 = VMOVRRD killed renamable $d1, 14 /* CC::al */, $noreg, implicit killed $q0
	; CHECK: tPOP_RET 14 /* CC::al */, $noreg, def $r4, def $pc, implicit killed $r0, implicit killed $r1, implicit killed $r2, implicit killed $r3
	bb.0.entry:
	successors: %bb.3(0x30000000), %bb.1(0x50000000)
	liveins: $r0, $r1, $r2, $r3, $r4, $lr

	frame-setup tPUSH 14, $noreg, killed $r4, killed $lr, implicit-def $sp, implicit $sp
	frame-setup CFI_INSTRUCTION def_cfa_offset 8
	frame-setup CFI_INSTRUCTION offset $lr, -4
	frame-setup CFI_INSTRUCTION offset $r4, -8
	renamable $r12 = t2ADDri $sp, 8, 14, $noreg, $noreg
	renamable $q0 = MVE_VLDRWU32 killed renamable $r12, 0, 0, $noreg :: (load 16 from %fixed-stack.0, align 8)
	tCBZ $r3, %bb.3

	bb.1.vector.ph:
	successors: %bb.2(0x80000000)
	liveins: $q0, $r0, $r1, $r2, $r3

	renamable $r12 = t2ADDri renamable $r3, 3, 14, $noreg, $noreg
	renamable $lr = t2MOVi 1, 14, $noreg, $noreg
	renamable $r12 = t2BICri killed renamable $r12, 3, 14, $noreg, $noreg
	renamable $q1 = MVE_VMOVimmi32 0, 0, $noreg, undef renamable $q1
	renamable $r12 = t2SUBri killed renamable $r12, 4, 14, $noreg, $noreg
	renamable $r4 = nuw nsw t2ADDrs killed renamable $lr, killed renamable $r12, 19, 14, $noreg, $noreg
	t2DoLoopStart renamable $r4
	$r12 = tMOVr killed $r4, 14, $noreg

	bb.2.vector.body:
	successors: %bb.2(0x7c000000), %bb.3(0x04000000)
	liveins: $q0, $q1, $r0, $r1, $r2, $r3, $r12

	renamable $vpr = MVE_VCTP32 renamable $r3, 0, $noreg
	MVE_VPST 4, implicit $vpr
	renamable $r0, renamable $q2 = MVE_VLDRHS32_post killed renamable $r0, 8, 1, renamable $vpr :: (load 8 from %ir.lsr.iv17, align 2)
	renamable $r1, renamable $q3 = MVE_VLDRHS32_post killed renamable $r1, 8, 1, renamable $vpr :: (load 8 from %ir.lsr.iv1820, align 2)
	$lr = tMOVr $r12, 14, $noreg
	renamable $q2 = nsw MVE_VMULi32 killed renamable $q3, killed renamable $q2, 0, $noreg, undef renamable $q2
	renamable $r12 = nsw t2SUBri killed $r12, 1, 14, $noreg, $noreg
	renamable $r3, dead $cpsr = tSUBi8 killed renamable $r3, 4, 14, $noreg
	renamable $q1 = MVE_VADDi32 killed renamable $q2, killed renamable $q1, 0, $noreg, undef renamable $q1
	renamable $lr = t2LoopDec killed renamable $lr, 1
	MVE_VPST 8, implicit $vpr
	renamable $r2 = MVE_VSTRWU32_post renamable $q1, killed renamable $r2, 16, 1, killed renamable $vpr :: (store 16 into %ir.lsr.store, align 4)
	t2LoopEnd killed renamable $lr, %bb.2, implicit-def dead $cpsr
	tB %bb.3, 14, $noreg

	bb.3.exit:
	liveins: $q0

	renamable $r0, renamable $r1 = VMOVRRD renamable $d0, 14, $noreg
	renamable $r2, renamable $r3 = VMOVRRD killed renamable $d1, 14, $noreg, implicit $q0
	tPOP_RET 14, $noreg, def $r4, def $pc, implicit killed $r0, implicit killed $r1, implicit killed $r2, implicit killed $r3

	...