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1# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py2# RUN: llc -mtriple=thumbv8.1m.main -run-pass=arm-low-overhead-loops %s -verify-machineinstrs -o - | FileCheck %s3 4--- |5 target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"6 target triple = "thumbv8.1m.main"7 8 define i32 @do_copy(i32 %n, ptr nocapture %p, ptr nocapture readonly %q) {9 entry:10 %scevgep = getelementptr i32, ptr %q, i32 -111 %scevgep3 = getelementptr i32, ptr %p, i32 -112 %start = call i32 @llvm.start.loop.iterations.i32(i32 %n)13 br label %while.body14 15 while.body: ; preds = %while.body, %entry16 %lsr.iv4 = phi ptr [ %scevgep5, %while.body ], [ %scevgep3, %entry ]17 %lsr.iv = phi ptr [ %scevgep1, %while.body ], [ %scevgep, %entry ]18 %0 = phi i32 [ %start, %entry ], [ %2, %while.body ]19 %scevgep6 = getelementptr i32, ptr %lsr.iv, i32 120 %scevgep2 = getelementptr i32, ptr %lsr.iv4, i32 121 %1 = load i32, ptr %scevgep6, align 422 store i32 %1, ptr %scevgep2, align 423 %scevgep1 = getelementptr i32, ptr %lsr.iv, i32 124 %scevgep5 = getelementptr i32, ptr %lsr.iv4, i32 125 %2 = call i32 @llvm.loop.decrement.reg.i32.i32.i32(i32 %0, i32 1)26 %3 = icmp ne i32 %2, 027 br i1 %3, label %while.body, label %while.end28 29 while.end: ; preds = %while.body30 ret i32 031 }32 33 declare i32 @llvm.start.loop.iterations.i32(i32) #034 declare i32 @llvm.loop.decrement.reg.i32.i32.i32(i32, i32) #035 36 attributes #0 = { noduplicate nounwind }37 attributes #1 = { nounwind }38 39...40---41name: do_copy42alignment: 243exposesReturnsTwice: false44legalized: false45regBankSelected: false46selected: false47failedISel: false48tracksRegLiveness: true49hasWinCFI: false50registers: []51liveins:52 - { reg: '$r0', virtual-reg: '' }53 - { reg: '$r1', virtual-reg: '' }54 - { reg: '$r2', virtual-reg: '' }55frameInfo:56 isFrameAddressTaken: false57 isReturnAddressTaken: false58 hasStackMap: false59 hasPatchPoint: false60 stackSize: 861 offsetAdjustment: 062 maxAlignment: 463 adjustsStack: false64 hasCalls: false65 stackProtector: ''66 maxCallFrameSize: 067 cvBytesOfCalleeSavedRegisters: 068 hasOpaqueSPAdjustment: false69 hasVAStart: false70 hasMustTailInVarArgFunc: false71 localFrameSize: 072 savePoint: []73 restorePoint: []74fixedStack: []75stack:76 - { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,77 stack-id: default, callee-saved-register: '$lr', callee-saved-restored: false,78 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }79 - { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,80 stack-id: default, callee-saved-register: '$r7', callee-saved-restored: true,81 debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }82callSites: []83constants: []84machineFunctionInfo: {}85body: |86 ; CHECK-LABEL: name: do_copy87 ; CHECK: bb.0.entry:88 ; CHECK-NEXT: successors: %bb.1(0x80000000)89 ; CHECK-NEXT: liveins: $lr, $r0, $r1, $r2, $r790 ; CHECK-NEXT: {{ $}}91 ; CHECK-NEXT: frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r7, killed $lr, implicit-def $sp, implicit $sp92 ; CHECK-NEXT: frame-setup CFI_INSTRUCTION def_cfa_offset 893 ; CHECK-NEXT: frame-setup CFI_INSTRUCTION offset $lr, -494 ; CHECK-NEXT: frame-setup CFI_INSTRUCTION offset $r7, -895 ; CHECK-NEXT: dead $lr = t2DLS $r096 ; CHECK-NEXT: $lr = tMOVr killed $r0, 14 /* CC::al */, $noreg97 ; CHECK-NEXT: renamable $r0, dead $cpsr = tSUBi3 killed renamable $r1, 4, 14 /* CC::al */, $noreg98 ; CHECK-NEXT: renamable $r1, dead $cpsr = tSUBi3 killed renamable $r2, 4, 14 /* CC::al */, $noreg99 ; CHECK-NEXT: {{ $}}100 ; CHECK-NEXT: bb.1.while.body:101 ; CHECK-NEXT: successors: %bb.1(0x7c000000), %bb.2(0x04000000)102 ; CHECK-NEXT: liveins: $lr, $r0, $r1103 ; CHECK-NEXT: {{ $}}104 ; CHECK-NEXT: renamable $r2, renamable $r1 = t2LDR_PRE killed renamable $r1, 4, 14 /* CC::al */, $noreg :: (load (s32) from %ir.scevgep6)105 ; CHECK-NEXT: early-clobber renamable $r0 = t2STR_PRE killed renamable $r2, killed renamable $r0, 4, 14 /* CC::al */, $noreg :: (store (s32) into %ir.scevgep2)106 ; CHECK-NEXT: $lr = t2LEUpdate killed renamable $lr, %bb.1107 ; CHECK-NEXT: {{ $}}108 ; CHECK-NEXT: bb.2.while.end:109 ; CHECK-NEXT: $r0, dead $cpsr = tMOVi8 0, 14 /* CC::al */, $noreg110 ; CHECK-NEXT: tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc, implicit killed $r0111 bb.0.entry:112 successors: %bb.1(0x80000000)113 liveins: $r0, $r1, $r2, $r7, $lr114 115 frame-setup tPUSH 14, $noreg, killed $r7, killed $lr, implicit-def $sp, implicit $sp116 frame-setup CFI_INSTRUCTION def_cfa_offset 8117 frame-setup CFI_INSTRUCTION offset $lr, -4118 frame-setup CFI_INSTRUCTION offset $r7, -8119 $lr = t2DoLoopStart $r0120 $lr = tMOVr killed $r0, 14, $noreg121 renamable $r0, dead $cpsr = tSUBi3 killed renamable $r1, 4, 14, $noreg122 renamable $r1, dead $cpsr = tSUBi3 killed renamable $r2, 4, 14, $noreg123 124 bb.1.while.body:125 successors: %bb.1(0x7c000000), %bb.2(0x04000000)126 liveins: $lr, $r0, $r1127 128 renamable $r2, renamable $r1 = t2LDR_PRE killed renamable $r1, 4, 14, $noreg :: (load (s32) from %ir.scevgep6)129 early-clobber renamable $r0 = t2STR_PRE killed renamable $r2, killed renamable $r0, 4, 14, $noreg :: (store (s32) into %ir.scevgep2)130 renamable $lr = t2LoopDec killed renamable $lr, 1131 t2LoopEnd renamable $lr, %bb.1, implicit-def dead $cpsr132 tB %bb.2, 14, $noreg133 134 bb.2.while.end:135 $r0, dead $cpsr = tMOVi8 0, 14, $noreg136 tPOP_RET 14, $noreg, def $r7, def $pc, implicit killed $r0137 138...139