forked from OSchip/llvm-project
131 lines
4.6 KiB
YAML
131 lines
4.6 KiB
YAML
# RUN: llc -mtriple=thumbv8.1m.main -mattr=+lob -run-pass=arm-low-overhead-loops --verify-machineinstrs %s -o - | FileCheck %s
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# CHECK: body:
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# CHECK: bb.0.entry:
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# CHECK: t2CMPri $lr, 0, 14
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# CHECK-NEXT: t2Bcc %bb.3, 0, $cpsr
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# CHECK-NEXT: tB %bb.1
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# CHECK: bb.1.do.body.preheader:
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# CHECK: $lr = tMOVr killed $r3
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# CHECK: bb.2.do.body:
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# CHECK: $lr = t2SUBri killed renamable $lr, 1, 14
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# CHECK-NEXT: t2CMPri $lr, 0, 14, $cpsr
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# CHECK-NEXT: t2Bcc %bb.2, 1, $cpsr
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# CHECK-NEXT: tB %bb.3, 14
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--- |
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target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "thumbv8.1m.main"
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define void @ne_trip_count(i1 zeroext %t1, i32* nocapture %a, i32* nocapture readonly %b, i32 %N) #0 {
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entry:
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%cmp = icmp ne i32 %N, 0
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%0 = call i1 @llvm.test.set.loop.iterations.i32(i32 %N)
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br i1 %0, label %do.body.preheader, label %if.end
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do.body.preheader: ; preds = %entry
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br label %do.body
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do.body: ; preds = %do.body.preheader, %do.body
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%i.0 = phi i32 [ %inc, %do.body ], [ 0, %do.body.preheader ]
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%1 = phi i32 [ %N, %do.body.preheader ], [ %2, %do.body ]
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%scevgep = getelementptr i32, i32* %b, i32 %i.0
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%scevgep1 = getelementptr i32, i32* %a, i32 %i.0
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%size = call i32 @llvm.arm.space(i32 4096, i32 undef)
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%tmp = load i32, i32* %scevgep, align 4
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store i32 %tmp, i32* %scevgep1, align 4
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%inc = add nuw i32 %i.0, 1
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%2 = call i32 @llvm.loop.decrement.reg.i32.i32.i32(i32 %1, i32 1)
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%3 = icmp ne i32 %2, 0
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br i1 %3, label %do.body, label %if.end
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if.end: ; preds = %do.body, %entry
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ret void
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}
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declare i32 @llvm.arm.space(i32, i32) #1
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declare i1 @llvm.test.set.loop.iterations.i32(i32) #2
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declare i32 @llvm.loop.decrement.reg.i32.i32.i32(i32, i32) #2
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attributes #0 = { "target-features"="+lob" }
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attributes #1 = { nounwind "target-features"="+lob" }
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attributes #2 = { noduplicate nounwind }
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attributes #3 = { nounwind }
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...
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---
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name: ne_trip_count
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alignment: 1
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exposesReturnsTwice: false
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legalized: false
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regBankSelected: false
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selected: false
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failedISel: false
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tracksRegLiveness: false
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hasWinCFI: false
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registers: []
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liveins:
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- { reg: '$r1', virtual-reg: '' }
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- { reg: '$r2', virtual-reg: '' }
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- { reg: '$r3', virtual-reg: '' }
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frameInfo:
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isFrameAddressTaken: false
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isReturnAddressTaken: false
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hasStackMap: false
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hasPatchPoint: false
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stackSize: 8
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offsetAdjustment: 0
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maxAlignment: 4
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adjustsStack: false
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hasCalls: false
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stackProtector: ''
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maxCallFrameSize: 0
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cvBytesOfCalleeSavedRegisters: 0
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hasOpaqueSPAdjustment: false
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hasVAStart: false
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hasMustTailInVarArgFunc: false
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localFrameSize: 0
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savePoint: ''
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restorePoint: ''
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fixedStack: []
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stack:
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- { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,
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stack-id: default, callee-saved-register: '$lr', callee-saved-restored: false,
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debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
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- { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,
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stack-id: default, callee-saved-register: '$r7', callee-saved-restored: true,
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debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
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callSites: []
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constants: []
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machineFunctionInfo: {}
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body: |
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bb.0.entry:
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successors: %bb.1(0x40000000), %bb.3(0x40000000)
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frame-setup tPUSH 14, $noreg, killed $r7, killed $lr, implicit-def $sp, implicit $sp
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frame-setup CFI_INSTRUCTION def_cfa_offset 8
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frame-setup CFI_INSTRUCTION offset $lr, -4
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frame-setup CFI_INSTRUCTION offset $r7, -8
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t2WhileLoopStart $r3, %bb.3
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tB %bb.1, 14, $noreg
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bb.1.do.body.preheader:
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successors: %bb.2(0x80000000)
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$lr = tMOVr killed $r3, 14, $noreg
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renamable $r0, dead $cpsr = tMOVi8 0, 14, $noreg
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bb.2.do.body:
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successors: %bb.2(0x7c000000), %bb.3(0x04000000)
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dead renamable $r3 = SPACE 4096, undef renamable $r0
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renamable $r3 = t2LDRs renamable $r2, renamable $r0, 2, 14, $noreg :: (load 4 from %ir.scevgep)
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t2STRs killed renamable $r3, renamable $r1, renamable $r0, 2, 14, $noreg :: (store 4 into %ir.scevgep1)
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renamable $r0, dead $cpsr = nuw tADDi8 killed renamable $r0, 1, 14, $noreg
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renamable $lr = t2LoopDec killed renamable $lr, 1
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t2LoopEnd renamable $lr, %bb.2
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tB %bb.3, 14, $noreg
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bb.3.if.end:
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tPOP_RET 14, $noreg, def $r7, def $pc
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...
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