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901cd5aed5
Add several new methods to ReachingDefAnalysis: - getReachingMIDef, instead of returning an integer, return the MachineInstr that produces the def. - getInstFromId, return a MachineInstr for which the given integer corresponds to. - hasSameReachingDef, return whether two MachineInstr use the same def of a register. - isRegUsedAfter, return whether a register is used after a given MachineInstr. These methods have been used in ARMLowOverhead to replace searching for uses/defs. Differential Revision: https://reviews.llvm.org/D70009
90 lines
2.5 KiB
YAML
90 lines
2.5 KiB
YAML
# RUN: llc -mtriple=thumbv7 -start-before=if-converter %s -o - | FileCheck %s
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--- |
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; ModuleID = 'vdup-test.ll'
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source_filename = "vdup-test.ll"
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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 = "thumbv7"
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define arm_aapcs_vfpcc <2 x i32> @NeonVdupMul(i32 %scalar, i32 %N, <2 x i32> %vector) {
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entry:
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%cmp = icmp ne i32 %N, 0
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%broadcast = insertelement <2 x i32> undef, i32 %scalar, i32 0
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%dup = shufflevector <2 x i32> %broadcast, <2 x i32> undef, <2 x i32> zeroinitializer
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%mul = mul <2 x i32> %dup, %vector
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br i1 %cmp, label %select.end, label %select.false
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select.false: ; preds = %entry
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br label %select.end
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select.end: ; preds = %entry, %select.false
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%res = phi <2 x i32> [ %mul, %entry ], [ %vector, %select.false ]
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ret <2 x i32> %res
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}
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...
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---
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name: NeonVdupMul
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alignment: 2
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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: true
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hasWinCFI: false
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registers: []
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liveins:
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- { reg: '$r0', virtual-reg: '' }
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- { reg: '$r1', virtual-reg: '' }
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- { reg: '$d0', 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: 0
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offsetAdjustment: 0
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maxAlignment: 1
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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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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(0x50000000), %bb.2(0x30000000)
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liveins: $d0, $r0, $r1
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t2CMPri killed renamable $r1, 0, 14, $noreg, implicit-def $cpsr
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t2Bcc %bb.2, 0, killed $cpsr
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bb.1:
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successors: %bb.2(0x80000000)
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liveins: $d0, $r0
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renamable $d16 = VDUP32d killed renamable $r0, 14, $noreg
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; Verify that the neon instructions haven't been conditionalized:
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; CHECK-LABEL: NeonVdupMul
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; CHECK: vdup.32
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; CHECK: vmul.i32
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renamable $d0 = VMULv2i32 killed renamable $d16, killed renamable $d0, 14, $noreg
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bb.2.select.end:
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liveins: $d0
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tBX_RET 14, $noreg, implicit $d0
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...
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