1# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
2# RUN: llc -mtriple=thumbv8.1m.main -mattr=+mve -run-pass=arm-low-overhead-loops %s -o - --verify-machineinstrs | FileCheck %s
3
4# IT-block with 2 statements, with the last instruction not connected to the
5# use-def chain of the iteration counter; make sure we don't remove the
6# IT block and any of its instructions.
7
8--- |
9  define hidden arm_aapcs_vfpcc void @it_block_2_stmts(float* %pSrc, float* %pDst, i32 %blockSize) local_unnamed_addr #0 {
10  entry:
11    %mul = shl i32 %blockSize, 1
12    %0 = add i32 %mul, 3
13    %1 = icmp slt i32 %mul, 4
14    %smin = select i1 %1, i32 %mul, i32 4
15    %2 = sub i32 %0, %smin
16    %3 = lshr i32 %2, 2
17    %4 = add nuw nsw i32 %3, 1
18    %start = call i32 @llvm.start.loop.iterations.i32(i32 %4)
19    br label %do.body
20
21  do.body:                                          ; preds = %do.body, %entry
22    %blkCnt.0 = phi i32 [ %mul, %entry ], [ %sub, %do.body ]
23    %pDst.addr.0 = phi float* [ %pDst, %entry ], [ %add.ptr4, %do.body ]
24    %pSrc.addr.0 = phi float* [ %pSrc, %entry ], [ %add.ptr, %do.body ]
25    %5 = phi i32 [ %start, %entry ], [ %9, %do.body ]
26    %6 = tail call <4 x i1> @llvm.arm.mve.vctp32(i32 %blkCnt.0)
27    %input_cast = bitcast float* %pSrc.addr.0 to <4 x float>*
28    %7 = tail call <4 x float> @llvm.masked.load.v4f32.p0v4f32(<4 x float>* %input_cast, i32 4, <4 x i1> %6, <4 x float> undef)
29    %8 = fmul <4 x float> %7, <float 1.000000e+00, float -1.000000e+00, float 1.000000e+00, float -1.000000e+00>
30    %output_cast = bitcast float* %pDst.addr.0 to <4 x float>*
31    tail call void @llvm.masked.store.v4f32.p0v4f32(<4 x float> %8, <4 x float>* %output_cast, i32 4, <4 x i1> %6)
32    %add.ptr = getelementptr inbounds float, float* %pSrc.addr.0, i32 4
33    %add.ptr4 = getelementptr inbounds float, float* %pDst.addr.0, i32 4
34    %sub = add nsw i32 %blkCnt.0, -4
35    %9 = call i32 @llvm.loop.decrement.reg.i32.i32.i32(i32 %5, i32 1)
36    %10 = icmp ne i32 %9, 0
37    br i1 %10, label %do.body, label %do.end
38
39  do.end:                                           ; preds = %do.body
40    ret void
41  }
42  declare <4 x i1> @llvm.arm.mve.vctp32(i32) #1
43  declare <4 x float> @llvm.masked.load.v4f32.p0v4f32(<4 x float>*, i32 immarg, <4 x i1>, <4 x float>)
44  declare void @llvm.masked.store.v4f32.p0v4f32(<4 x float>, <4 x float>*, i32 immarg, <4 x i1>)
45  declare i32 @llvm.start.loop.iterations.i32(i32)
46  declare i32 @llvm.loop.decrement.reg.i32.i32.i32(i32, i32)
47
48...
49---
50name:            it_block_2_stmts
51alignment:       16
52exposesReturnsTwice: false
53legalized:       false
54regBankSelected: false
55selected:        false
56failedISel:      false
57tracksRegLiveness: true
58hasWinCFI:       false
59registers:       []
60liveins:
61  - { reg: '$r0', virtual-reg: '' }
62  - { reg: '$r1', virtual-reg: '' }
63  - { reg: '$r2', virtual-reg: '' }
64frameInfo:
65  isFrameAddressTaken: false
66  isReturnAddressTaken: false
67  hasStackMap:     false
68  hasPatchPoint:   false
69  stackSize:       8
70  offsetAdjustment: 0
71  maxAlignment:    4
72  adjustsStack:    false
73  hasCalls:        false
74  stackProtector:  ''
75  maxCallFrameSize: 0
76  cvBytesOfCalleeSavedRegisters: 0
77  hasOpaqueSPAdjustment: false
78  hasVAStart:      false
79  hasMustTailInVarArgFunc: false
80  localFrameSize:  0
81  savePoint:       ''
82  restorePoint:    ''
83fixedStack:      []
84stack:
85  - { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,
86      stack-id: default, callee-saved-register: '$lr', callee-saved-restored: false,
87      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
88  - { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,
89      stack-id: default, callee-saved-register: '$r7', callee-saved-restored: true,
90      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
91callSites:       []
92constants:
93  - id:              0
94    value:           '<4 x float> <float 1.000000e+00, float -1.000000e+00, float 1.000000e+00, float -1.000000e+00>'
95    alignment:       16
96    isTargetSpecific: false
97machineFunctionInfo: {}
98body:             |
99  ; CHECK-LABEL: name: it_block_2_stmts
100  ; CHECK: bb.0.entry:
101  ; CHECK:   successors: %bb.1(0x80000000)
102  ; CHECK:   liveins: $lr, $r0, $r1, $r2, $r7
103  ; CHECK:   frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r7, killed $lr, implicit-def $sp, implicit $sp
104  ; CHECK:   frame-setup CFI_INSTRUCTION def_cfa_offset 8
105  ; CHECK:   frame-setup CFI_INSTRUCTION offset $lr, -4
106  ; CHECK:   frame-setup CFI_INSTRUCTION offset $r7, -8
107  ; CHECK:   renamable $r3, dead $cpsr = tLSLri renamable $r2, 1, 14 /* CC::al */, $noreg
108  ; CHECK:   renamable $r12 = t2MOVi 4, 14 /* CC::al */, $noreg, $noreg
109  ; CHECK:   tCMPi8 renamable $r3, 4, 14 /* CC::al */, $noreg, implicit-def $cpsr
110  ; CHECK:   t2IT 11, 8, implicit-def $itstate
111  ; CHECK:   $r12 = t2LSLri renamable $r2, 1, 11 /* CC::lt */, $cpsr, $noreg, implicit killed renamable $r12, implicit $itstate
112  ; CHECK:   $r0 = t2ADDri killed renamable $r0, 42, 11 /* CC::lt */, killed $cpsr, $noreg, implicit killed renamable $r0, implicit killed $itstate
113  ; CHECK:   renamable $r2 = t2RSBrs killed renamable $r12, killed renamable $r2, 10, 14 /* CC::al */, $noreg, $noreg
114  ; CHECK:   dead renamable $r12 = t2ADDri killed renamable $r2, 3, 14 /* CC::al */, $noreg, $noreg
115  ; CHECK:   dead renamable $r2, dead $cpsr = tMOVi8 1, 14 /* CC::al */, $noreg
116  ; CHECK:   renamable $r2 = tLEApcrel %const.0, 14 /* CC::al */, $noreg
117  ; CHECK:   renamable $q0 = MVE_VLDRWU32 killed renamable $r2, 0, 0, $noreg :: (load 16 from constant-pool)
118  ; CHECK:   $lr = MVE_DLSTP_32 killed renamable $r3
119  ; CHECK: bb.1.do.body (align 4):
120  ; CHECK:   successors: %bb.1(0x7c000000), %bb.2(0x04000000)
121  ; CHECK:   liveins: $lr, $q0, $r0, $r1
122  ; CHECK:   renamable $q1 = nnan ninf nsz MVE_VLDRWU32 renamable $r0, 0, 0, $noreg
123  ; CHECK:   renamable $q1 = nnan ninf nsz MVE_VMULf32 killed renamable $q1, renamable $q0, 0, $noreg, undef renamable $q1
124  ; CHECK:   MVE_VSTRWU32 killed renamable $q1, renamable $r1, 0, 0, killed $noreg
125  ; CHECK:   renamable $r0, dead $cpsr = nuw tADDi8 killed renamable $r0, 16, 14 /* CC::al */, $noreg
126  ; CHECK:   renamable $r1, dead $cpsr = nuw tADDi8 killed renamable $r1, 16, 14 /* CC::al */, $noreg
127  ; CHECK:   $lr = MVE_LETP killed renamable $lr, %bb.1
128  ; CHECK: bb.2.do.end:
129  ; CHECK:   tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc
130  ; CHECK: bb.3 (align 16):
131  ; CHECK:   CONSTPOOL_ENTRY 0, %const.0, 16
132  bb.0.entry:
133    successors: %bb.1(0x80000000)
134    liveins: $r0, $r1, $r2, $r7, $lr
135
136    frame-setup tPUSH 14, $noreg, killed $r7, killed $lr, implicit-def $sp, implicit $sp
137    frame-setup CFI_INSTRUCTION def_cfa_offset 8
138    frame-setup CFI_INSTRUCTION offset $lr, -4
139    frame-setup CFI_INSTRUCTION offset $r7, -8
140    renamable $r3, dead $cpsr = tLSLri renamable $r2, 1, 14, $noreg
141    renamable $r12 = t2MOVi 4, 14, $noreg, $noreg
142    tCMPi8 renamable $r3, 4, 14, $noreg, implicit-def $cpsr
143    t2IT 11, 8, implicit-def $itstate
144    $r12 = t2LSLri renamable $r2, 1, 11, $cpsr, $noreg, implicit renamable $r12, implicit $itstate
145    $r0 = t2ADDri renamable $r0, 42, 11, killed $cpsr, $noreg, implicit killed renamable $r0, implicit killed $itstate
146    renamable $r2 = t2RSBrs killed renamable $r12, killed renamable $r2, 10, 14, $noreg, $noreg
147    renamable $r12 = t2ADDri killed renamable $r2, 3, 14, $noreg, $noreg
148    renamable $r2, dead $cpsr = tMOVi8 1, 14, $noreg
149    renamable $lr = nuw nsw t2ADDrs killed renamable $r2, killed renamable $r12, 19, 14, $noreg, $noreg
150    renamable $r2 = tLEApcrel %const.0, 14, $noreg
151    renamable $q0 = MVE_VLDRWU32 killed renamable $r2, 0, 0, $noreg :: (load 16 from constant-pool)
152    $lr = t2DoLoopStart renamable $lr
153
154  bb.1.do.body (align 4):
155    successors: %bb.1(0x7c000000), %bb.2(0x04000000)
156    liveins: $lr, $q0, $r0, $r1, $r3
157
158    renamable $vpr = MVE_VCTP32 renamable $r3, 0, $noreg
159    MVE_VPST 2, implicit $vpr
160    renamable $q1 = nnan ninf nsz MVE_VLDRWU32 renamable $r0, 0, 1, renamable $vpr
161    renamable $q1 = nnan ninf nsz MVE_VMULf32 killed renamable $q1, renamable $q0, 1, renamable $vpr, undef renamable $q1
162    MVE_VSTRWU32 killed renamable $q1, renamable $r1, 0, 1, killed renamable $vpr
163    renamable $r0, dead $cpsr = nuw tADDi8 killed renamable $r0, 16, 14, $noreg
164    renamable $lr = t2LoopDec killed renamable $lr, 1
165    renamable $r1, dead $cpsr = nuw tADDi8 killed renamable $r1, 16, 14, $noreg
166    renamable $r3, dead $cpsr = nsw tSUBi8 killed renamable $r3, 4, 14, $noreg
167    t2LoopEnd renamable $lr, %bb.1, implicit-def dead $cpsr
168    tB %bb.2, 14, $noreg
169
170  bb.2.do.end:
171    tPOP_RET 14, $noreg, def $r7, def $pc
172
173  bb.3 (align 16):
174    CONSTPOOL_ENTRY 0, %const.0, 16
175
176...
177