no-dec-cbnz.mir
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# RUN: llc -mtriple=thumbv8.1m.main %s -run-pass=arm-cp-islands --verify-machineinstrs -o - | FileCheck %s --check-prefix=CHECK-LOB
# RUN: llc -mtriple=thumbv8.1m.main -mattr=-lob %s -run-pass=arm-cp-islands --verify-machineinstrs -o - | FileCheck %s --check-prefix=CHECK-NOLOB
# CHECK-NOLOB-NOT: t2LE
# CHECK-LOB: bb.3.land.rhs:
# CHECK-LOB: renamable $r0 = tLDRi killed renamable $r0, 0, 14, $noreg
# CHECK-LOB: tCBNZ $r0, %bb.8
# CHECK-LOB: t2LE %bb.3
# CHECK-LOB: bb.7.while.body19:
# CHECK-LOB: tCBZ $r0, %bb.8
# CHECK-LOB: t2LE %bb.6
# CHECK-LOB: bb.8:
--- |
target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "thumbv8.1m.main"
%struct.head_s = type { %struct.head_s*, %struct.data_s* }
%struct.data_s = type { i16, i16 }
; Function Attrs: norecurse nounwind readonly
define dso_local arm_aapcscc %struct.head_s* @search(%struct.head_s* readonly %list, %struct.data_s* nocapture readonly %info) local_unnamed_addr #0 {
entry:
%idx = getelementptr inbounds %struct.data_s, %struct.data_s* %info, i32 0, i32 1
%0 = load i16, i16* %idx, align 2
%cmp = icmp sgt i16 %0, -1
br i1 %cmp, label %while.cond.preheader, label %while.cond9.preheader
while.cond9.preheader: ; preds = %entry
%1 = icmp eq %struct.head_s* %list, null
br i1 %1, label %return, label %land.rhs11.lr.ph
land.rhs11.lr.ph: ; preds = %while.cond9.preheader
%data16143 = bitcast %struct.data_s* %info to i16*
%2 = load i16, i16* %data16143, align 2
%conv15 = sext i16 %2 to i32
br label %land.rhs11
while.cond.preheader: ; preds = %entry
%3 = icmp eq %struct.head_s* %list, null
br i1 %3, label %return, label %land.rhs.preheader
land.rhs.preheader: ; preds = %while.cond.preheader
br label %land.rhs
land.rhs: ; preds = %land.rhs.preheader, %while.body
%list.addr.033 = phi %struct.head_s* [ %6, %while.body ], [ %list, %land.rhs.preheader ]
%info2 = getelementptr inbounds %struct.head_s, %struct.head_s* %list.addr.033, i32 0, i32 1
%4 = load %struct.data_s*, %struct.data_s** %info2, align 4
%idx3 = getelementptr inbounds %struct.data_s, %struct.data_s* %4, i32 0, i32 1
%5 = load i16, i16* %idx3, align 2
%cmp7 = icmp eq i16 %5, %0
br i1 %cmp7, label %return, label %while.body
while.body: ; preds = %land.rhs
%next4 = bitcast %struct.head_s* %list.addr.033 to %struct.head_s**
%6 = load %struct.head_s*, %struct.head_s** %next4, align 4
%tobool = icmp ne %struct.head_s* %6, null
br i1 %tobool, label %return, label %land.rhs
land.rhs11: ; preds = %while.body19, %land.rhs11.lr.ph
%list.addr.136 = phi %struct.head_s* [ %list, %land.rhs11.lr.ph ], [ %10, %while.body19 ]
%info12 = getelementptr inbounds %struct.head_s, %struct.head_s* %list.addr.136, i32 0, i32 1
%7 = load %struct.data_s*, %struct.data_s** %info12, align 4
%data165 = bitcast %struct.data_s* %7 to i16*
%8 = load i16, i16* %data165, align 2
%9 = and i16 %8, 255
%and = zext i16 %9 to i32
%cmp16 = icmp eq i32 %and, %conv15
br i1 %cmp16, label %return, label %while.body19
while.body19: ; preds = %land.rhs11
%next206 = bitcast %struct.head_s* %list.addr.136 to %struct.head_s**
%10 = load %struct.head_s*, %struct.head_s** %next206, align 4
%tobool10 = icmp eq %struct.head_s* %10, null
br i1 %tobool10, label %return, label %land.rhs11
return: ; preds = %while.body19, %land.rhs11, %while.body, %land.rhs, %while.cond.preheader, %while.cond9.preheader
%retval.0 = phi %struct.head_s* [ null, %while.cond.preheader ], [ null, %while.cond9.preheader ], [ %list.addr.033, %land.rhs ], [ null, %while.body ], [ %list.addr.136, %land.rhs11 ], [ null, %while.body19 ]
ret %struct.head_s* %retval.0
}
attributes #0 = { norecurse nounwind readonly "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+armv8.1-m.main,+hwdiv,+lob,+ras,+soft-float,+strict-align,+thumb-mode,-crypto,-d32,-dotprod,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-neon,-vfp2,-vfp2d16,-vfp2d16sp,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp" "unsafe-fp-math"="false" "use-soft-float"="true" }
...
---
name: search
alignment: 1
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
registers: []
liveins:
- { reg: '$r0', virtual-reg: '' }
- { reg: '$r1', virtual-reg: '' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 0
offsetAdjustment: 0
maxAlignment: 1
adjustsStack: false
hasCalls: false
stackProtector: ''
maxCallFrameSize: 0
cvBytesOfCalleeSavedRegisters: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
localFrameSize: 0
savePoint: ''
restorePoint: ''
fixedStack: []
stack: []
callSites: []
constants: []
machineFunctionInfo: {}
body: |
bb.0.entry:
successors: %bb.5(0x50000000), %bb.1(0x30000000)
liveins: $r0, $r1
renamable $r2 = t2LDRSHi12 renamable $r1, 2, 14, $noreg :: (load 2 from %ir.idx)
t2CMPri renamable $r2, -1, 14, $noreg, implicit-def $cpsr
t2Bcc %bb.1, 13, killed $cpsr
bb.5.while.cond.preheader:
successors: %bb.8(0x30000000), %bb.6(0x50000000)
liveins: $r0, $r2
tCMPi8 renamable $r0, 0, 14, $noreg, implicit-def $cpsr
t2Bcc %bb.8, 0, killed $cpsr
bb.6.land.rhs.preheader:
successors: %bb.7(0x80000000)
liveins: $r0, $r2
renamable $r1 = tUXTH killed renamable $r2, 14, $noreg
bb.7.land.rhs:
successors: %bb.8(0x04000000), %bb.7(0x7c000000)
liveins: $r0, $r1
renamable $r2 = tLDRi renamable $r0, 1, 14, $noreg :: (load 4 from %ir.info2)
renamable $r2 = tLDRHi killed renamable $r2, 1, 14, $noreg :: (load 2 from %ir.idx3)
tCMPr killed renamable $r2, renamable $r1, 14, $noreg, implicit-def $cpsr
t2IT 0, 8, implicit-def $itstate
tBX_RET 0, killed $cpsr, implicit $r0, implicit killed $itstate
renamable $r0 = tLDRi killed renamable $r0, 0, 14, $noreg :: (load 4 from %ir.next4)
tCMPi8 renamable $r0, 0, 14, $noreg, implicit-def $cpsr
t2Bcc %bb.7, 0, killed $cpsr
t2B %bb.8, 14, $noreg
bb.1.while.cond9.preheader:
successors: %bb.8(0x30000000), %bb.2(0x50000000)
liveins: $r0, $r1
tCMPi8 renamable $r0, 0, 14, $noreg, implicit-def $cpsr
t2Bcc %bb.8, 0, killed $cpsr
bb.2.land.rhs11.lr.ph:
successors: %bb.3(0x80000000)
liveins: $r0, $r1
renamable $r1 = t2LDRSHi12 killed renamable $r1, 0, 14, $noreg :: (load 2 from %ir.data16143)
bb.3.land.rhs11:
successors: %bb.9(0x04000000), %bb.4(0x7c000000)
liveins: $r0, $r1
renamable $r2 = tLDRi renamable $r0, 1, 14, $noreg :: (load 4 from %ir.info12)
renamable $r2 = tLDRBi killed renamable $r2, 0, 14, $noreg :: (load 1 from %ir.data165, align 2)
tCMPr killed renamable $r2, renamable $r1, 14, $noreg, implicit-def $cpsr
t2Bcc %bb.9, 0, killed $cpsr
bb.4.while.body19:
successors: %bb.8(0x04000000), %bb.3(0x7c000000)
liveins: $r0, $r1
renamable $r0 = tLDRi killed renamable $r0, 0, 14, $noreg :: (load 4 from %ir.next206)
tCMPi8 renamable $r0, 0, 14, $noreg, implicit-def $cpsr
t2Bcc %bb.3, 1, killed $cpsr
bb.8:
successors: %bb.9(0x80000000)
renamable $r0, dead $cpsr = tMOVi8 0, 14, $noreg
bb.9.return:
liveins: $r0
tBX_RET 14, $noreg, implicit killed $r0
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