# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=thumbv8.1m.main -run-pass=arm-low-overhead-loops %s -verify-machineinstrs -o - | FileCheck %s
--- |
target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "thumbv8.1m.main"
define void @size_limit(ptr nocapture %a, ptr nocapture readonly %b, ptr nocapture readonly %c, i32 %N) {
entry:
%start = call i32 @llvm.start.loop.iterations.i32(i32 %N)
%scevgep = getelementptr i32, ptr %a, i32 -1
%scevgep4 = getelementptr i32, ptr %c, i32 -1
%scevgep8 = getelementptr i32, ptr %b, i32 -1
br label %for.header
for.body: ; preds = %for.header
%scevgep11 = getelementptr i32, ptr %lsr.iv9, i32 1
%ld1 = load i32, ptr %scevgep11, align 4
%scevgep7 = getelementptr i32, ptr %lsr.iv5, i32 1
%ld2 = load i32, ptr %scevgep7, align 4
%mul = mul nsw i32 %ld2, %ld1
%scevgep3 = getelementptr i32, ptr %lsr.iv1, i32 1
store i32 %mul, ptr %scevgep3, align 4
%scevgep2 = getelementptr i32, ptr %lsr.iv1, i32 1
%scevgep6 = getelementptr i32, ptr %lsr.iv5, i32 1
%scevgep10 = getelementptr i32, ptr %lsr.iv9, i32 1
%count.next = call i32 @llvm.loop.decrement.reg.i32.i32.i32(i32 %count, i32 1)
%cmp = icmp ne i32 %count.next, 0
br i1 %cmp, label %for.header, label %for.cond.cleanup
for.cond.cleanup: ; preds = %for.body
ret void
for.header: ; preds = %for.body, %entry
%lsr.iv9 = phi ptr [ %scevgep8, %entry ], [ %scevgep10, %for.body ]
%lsr.iv5 = phi ptr [ %scevgep4, %entry ], [ %scevgep6, %for.body ]
%lsr.iv1 = phi ptr [ %scevgep, %entry ], [ %scevgep2, %for.body ]
%count = phi i32 [ %start, %entry ], [ %count.next, %for.body ]
br label %for.body
}
declare i32 @llvm.arm.space(i32 immarg, i32) #0
declare i32 @llvm.start.loop.iterations.i32(i32) #1
declare i32 @llvm.loop.decrement.reg.i32.i32.i32(i32, i32) #1
attributes #0 = { nounwind }
attributes #1 = { noduplicate nounwind }
...
---
name: size_limit
alignment: 2
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
registers: []
liveins:
- { reg: '$r0', virtual-reg: '' }
- { reg: '$r1', virtual-reg: '' }
- { reg: '$r2', virtual-reg: '' }
- { reg: '$r3', virtual-reg: '' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 40
offsetAdjustment: 0
maxAlignment: 4
adjustsStack: false
hasCalls: false
stackProtector: ''
maxCallFrameSize: 0
cvBytesOfCalleeSavedRegisters: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
localFrameSize: 0
savePoint: ''
restorePoint: ''
fixedStack: []
stack:
- { id: 0, name: '', type: spill-slot, offset: -12, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 1, name: '', type: spill-slot, offset: -16, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 2, name: '', type: spill-slot, offset: -20, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 3, name: '', type: spill-slot, offset: -24, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 4, name: '', type: spill-slot, offset: -28, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 5, name: '', type: spill-slot, offset: -32, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 6, name: '', type: spill-slot, offset: -36, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 7, name: '', type: spill-slot, offset: -40, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 8, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '$lr', callee-saved-restored: false,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 9, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '$r7', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites: []
constants: []
machineFunctionInfo: {}
body: |
; CHECK-LABEL: name: size_limit
; CHECK: bb.0.entry:
; CHECK-NEXT: successors: %bb.3(0x80000000)
; CHECK-NEXT: liveins: $lr, $r0, $r1, $r2, $r3, $r7
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r7, killed $lr, implicit-def $sp, implicit $sp
; CHECK-NEXT: frame-setup CFI_INSTRUCTION def_cfa_offset 8
; CHECK-NEXT: frame-setup CFI_INSTRUCTION offset $lr, -4
; CHECK-NEXT: frame-setup CFI_INSTRUCTION offset $r7, -8
; CHECK-NEXT: $sp = frame-setup tSUBspi $sp, 8, 14 /* CC::al */, $noreg
; CHECK-NEXT: frame-setup CFI_INSTRUCTION def_cfa_offset 40
; CHECK-NEXT: dead $lr = tMOVr renamable $r3, 14 /* CC::al */, $noreg
; CHECK-NEXT: renamable $r0, dead $cpsr = tSUBi8 killed renamable $r0, 4, 14 /* CC::al */, $noreg
; CHECK-NEXT: renamable $r2, dead $cpsr = tSUBi8 killed renamable $r2, 4, 14 /* CC::al */, $noreg
; CHECK-NEXT: renamable $r1, dead $cpsr = tSUBi8 killed renamable $r1, 4, 14 /* CC::al */, $noreg
; CHECK-NEXT: tSTRspi killed $r1, $sp, 7, 14 /* CC::al */, $noreg :: (store (s32) into %stack.0)
; CHECK-NEXT: tSTRspi killed $r2, $sp, 6, 14 /* CC::al */, $noreg :: (store (s32) into %stack.1)
; CHECK-NEXT: tSTRspi killed $r0, $sp, 5, 14 /* CC::al */, $noreg :: (store (s32) into %stack.2)
; CHECK-NEXT: tSTRspi killed $r3, $sp, 4, 14 /* CC::al */, $noreg :: (store (s32) into %stack.3)
; CHECK-NEXT: tB %bb.3, 14 /* CC::al */, $noreg
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.1.for.body:
; CHECK-NEXT: successors: %bb.3(0x40000000), %bb.2(0x40000000)
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: $r0 = tLDRspi $sp, 3, 14 /* CC::al */, $noreg :: (load (s32) from %stack.4)
; CHECK-NEXT: renamable $r1, renamable $r0 = t2LDR_PRE killed renamable $r0, 4, 14 /* CC::al */, $noreg :: (load (s32) from %ir.scevgep11)
; CHECK-NEXT: $r2 = tLDRspi $sp, 2, 14 /* CC::al */, $noreg :: (load (s32) from %stack.5)
; CHECK-NEXT: renamable $r3, renamable $r2 = t2LDR_PRE killed renamable $r2, 4, 14 /* CC::al */, $noreg :: (load (s32) from %ir.scevgep7)
; CHECK-NEXT: renamable $r1, dead $cpsr = nsw tMUL killed renamable $r3, killed renamable $r1, 14 /* CC::al */, $noreg
; CHECK-NEXT: $r3 = tLDRspi $sp, 1, 14 /* CC::al */, $noreg :: (load (s32) from %stack.6)
; CHECK-NEXT: early-clobber renamable $r3 = t2STR_PRE killed renamable $r1, killed renamable $r3, 4, 14 /* CC::al */, $noreg :: (store (s32) into %ir.scevgep3)
; CHECK-NEXT: $r1 = tLDRspi $sp, 0, 14 /* CC::al */, $noreg :: (load (s32) from %stack.7)
; CHECK-NEXT: $lr = tMOVr killed $r1, 14 /* CC::al */, $noreg
; CHECK-NEXT: renamable $lr = t2SUBri killed renamable $lr, 1, 14 /* CC::al */, $noreg, def $cpsr
; CHECK-NEXT: $r12 = tMOVr killed $lr, 14 /* CC::al */, $noreg
; CHECK-NEXT: tSTRspi killed $r0, $sp, 7, 14 /* CC::al */, $noreg :: (store (s32) into %stack.0)
; CHECK-NEXT: tSTRspi killed $r2, $sp, 6, 14 /* CC::al */, $noreg :: (store (s32) into %stack.1)
; CHECK-NEXT: tSTRspi killed $r3, $sp, 5, 14 /* CC::al */, $noreg :: (store (s32) into %stack.2)
; CHECK-NEXT: t2STRi12 killed $r12, $sp, 16, 14 /* CC::al */, $noreg :: (store (s32) into %stack.3)
; CHECK-NEXT: tBcc %bb.3, 1 /* CC::ne */, killed $cpsr
; CHECK-NEXT: tB %bb.2, 14 /* CC::al */, $noreg
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.2.for.cond.cleanup:
; CHECK-NEXT: $sp = tADDspi $sp, 8, 14 /* CC::al */, $noreg
; CHECK-NEXT: tPOP_RET 14 /* CC::al */, $noreg, def $r7, def $pc
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.3.for.header:
; CHECK-NEXT: successors: %bb.1(0x80000000)
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: $r0 = tLDRspi $sp, 4, 14 /* CC::al */, $noreg :: (load (s32) from %stack.3)
; CHECK-NEXT: $r1 = tLDRspi $sp, 5, 14 /* CC::al */, $noreg :: (load (s32) from %stack.2)
; CHECK-NEXT: $r2 = tLDRspi $sp, 6, 14 /* CC::al */, $noreg :: (load (s32) from %stack.1)
; CHECK-NEXT: $r3 = tLDRspi $sp, 7, 14 /* CC::al */, $noreg :: (load (s32) from %stack.0)
; CHECK-NEXT: tSTRspi killed $r0, $sp, 0, 14 /* CC::al */, $noreg :: (store (s32) into %stack.7)
; CHECK-NEXT: tSTRspi killed $r1, $sp, 1, 14 /* CC::al */, $noreg :: (store (s32) into %stack.6)
; CHECK-NEXT: tSTRspi killed $r2, $sp, 2, 14 /* CC::al */, $noreg :: (store (s32) into %stack.5)
; CHECK-NEXT: tSTRspi killed $r3, $sp, 3, 14 /* CC::al */, $noreg :: (store (s32) into %stack.4)
; CHECK-NEXT: tB %bb.1, 14 /* CC::al */, $noreg
bb.0.entry:
successors: %bb.3(0x80000000)
liveins: $r0, $r1, $r2, $r3, $r7, $lr
frame-setup tPUSH 14, $noreg, killed $r7, 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 $r7, -8
$sp = frame-setup tSUBspi $sp, 8, 14, $noreg
frame-setup CFI_INSTRUCTION def_cfa_offset 40
$lr = t2DoLoopStart renamable $r3
renamable $r0, dead $cpsr = tSUBi8 killed renamable $r0, 4, 14, $noreg
renamable $r2, dead $cpsr = tSUBi8 killed renamable $r2, 4, 14, $noreg
renamable $r1, dead $cpsr = tSUBi8 killed renamable $r1, 4, 14, $noreg
tSTRspi killed $r1, $sp, 7, 14, $noreg :: (store (s32) into %stack.0)
tSTRspi killed $r2, $sp, 6, 14, $noreg :: (store (s32) into %stack.1)
tSTRspi killed $r0, $sp, 5, 14, $noreg :: (store (s32) into %stack.2)
tSTRspi killed $r3, $sp, 4, 14, $noreg :: (store (s32) into %stack.3)
tB %bb.3, 14, $noreg
bb.1.for.body:
successors: %bb.3(0x40000000), %bb.2(0x40000000)
$r0 = tLDRspi $sp, 3, 14, $noreg :: (load (s32) from %stack.4)
renamable $r1, renamable $r0 = t2LDR_PRE renamable $r0, 4, 14, $noreg :: (load (s32) from %ir.scevgep11)
$r2 = tLDRspi $sp, 2, 14, $noreg :: (load (s32) from %stack.5)
renamable $r3, renamable $r2 = t2LDR_PRE renamable $r2, 4, 14, $noreg :: (load (s32) from %ir.scevgep7)
renamable $r1, dead $cpsr = nsw tMUL killed renamable $r3, killed renamable $r1, 14, $noreg
$r3 = tLDRspi $sp, 1, 14, $noreg :: (load (s32) from %stack.6)
early-clobber renamable $r3 = t2STR_PRE killed renamable $r1, renamable $r3, 4, 14, $noreg :: (store (s32) into %ir.scevgep3)
$r1 = tLDRspi $sp, 0, 14, $noreg :: (load (s32) from %stack.7)
$lr = tMOVr killed $r1, 14, $noreg
renamable $lr = t2LoopDec killed renamable $lr, 1
$r12 = tMOVr $lr, 14, $noreg
tSTRspi killed $r0, $sp, 7, 14, $noreg :: (store (s32) into %stack.0)
tSTRspi killed $r2, $sp, 6, 14, $noreg :: (store (s32) into %stack.1)
tSTRspi killed $r3, $sp, 5, 14, $noreg :: (store (s32) into %stack.2)
t2STRi12 killed $r12, $sp, 16, 14, $noreg :: (store (s32) into %stack.3)
t2LoopEnd killed renamable $lr, %bb.3, implicit-def dead $cpsr
tB %bb.2, 14, $noreg
bb.2.for.cond.cleanup:
$sp = tADDspi $sp, 8, 14, $noreg
tPOP_RET 14, $noreg, def $r7, def $pc
bb.3.for.header:
successors: %bb.1(0x80000000)
$r0 = tLDRspi $sp, 4, 14, $noreg :: (load (s32) from %stack.3)
$r1 = tLDRspi $sp, 5, 14, $noreg :: (load (s32) from %stack.2)
$r2 = tLDRspi $sp, 6, 14, $noreg :: (load (s32) from %stack.1)
$r3 = tLDRspi $sp, 7, 14, $noreg :: (load (s32) from %stack.0)
tSTRspi killed $r0, $sp, 0, 14, $noreg :: (store (s32) into %stack.7)
tSTRspi killed $r1, $sp, 1, 14, $noreg :: (store (s32) into %stack.6)
tSTRspi killed $r2, $sp, 2, 14, $noreg :: (store (s32) into %stack.5)
tSTRspi killed $r3, $sp, 3, 14, $noreg :: (store (s32) into %stack.4)
tB %bb.1, 14, $noreg
...
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