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llvm-for-llvmta/test/CodeGen/Thumb2/LowOverheadLoops/mov-after-dlstp.mir

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2022-04-25 10:02:23 +02:00
# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=thumbv8.1m.main -mattr=+mve.fp -run-pass=arm-low-overhead-loops -tail-predication=enabled %s -o - | FileCheck %s
# TODOD: As far as I can tell this test is fine. The tail predicating the second loop means we remove the instruction that would otherwise block the first.
--- |
define arm_aapcs_vfpcc void @arm_var_f32_mve(float* %pSrc, i32 %blockSize, float* nocapture %pResult) #0 {
entry:
%0 = add i32 %blockSize, 3
%1 = icmp slt i32 %blockSize, 4
%smin = select i1 %1, i32 %blockSize, i32 4
%2 = sub i32 %0, %smin
%3 = lshr i32 %2, 2
%4 = add nuw nsw i32 %3, 1
%5 = icmp slt i32 %blockSize, 4
%smin3 = select i1 %5, i32 %blockSize, i32 4
%6 = sub i32 %0, %smin3
%7 = lshr i32 %6, 2
%8 = add nuw nsw i32 %7, 1
%start1 = call i32 @llvm.start.loop.iterations.i32(i32 %8)
br label %do.body.i
do.body.i: ; preds = %do.body.i, %entry
%blkCnt.0.i = phi i32 [ %13, %do.body.i ], [ %blockSize, %entry ]
%sumVec.0.i = phi <4 x float> [ %12, %do.body.i ], [ zeroinitializer, %entry ]
%pSrc.addr.0.i = phi float* [ %add.ptr.i, %do.body.i ], [ %pSrc, %entry ]
%9 = phi i32 [ %start1, %entry ], [ %14, %do.body.i ]
%pSrc.addr.0.i2 = bitcast float* %pSrc.addr.0.i to <4 x float>*
%10 = tail call <4 x i1> @llvm.arm.mve.vctp32(i32 %blkCnt.0.i)
%11 = tail call fast <4 x float> @llvm.masked.load.v4f32.p0v4f32(<4 x float>* %pSrc.addr.0.i2, i32 4, <4 x i1> %10, <4 x float> zeroinitializer)
%12 = tail call fast <4 x float> @llvm.arm.mve.add.predicated.v4f32.v4i1(<4 x float> %sumVec.0.i, <4 x float> %11, <4 x i1> %10, <4 x float> %sumVec.0.i)
%add.ptr.i = getelementptr inbounds float, float* %pSrc.addr.0.i, i32 4
%13 = add i32 %blkCnt.0.i, -4
%14 = call i32 @llvm.loop.decrement.reg.i32(i32 %9, i32 1)
%15 = icmp ne i32 %14, 0
br i1 %15, label %do.body.i, label %arm_mean_f32_mve.exit
arm_mean_f32_mve.exit: ; preds = %do.body.i
%16 = extractelement <4 x float> %12, i32 3
%add2.i.i = fadd fast float %16, %16
%conv.i = uitofp i32 %blockSize to float
%div.i = fdiv fast float %add2.i.i, %conv.i
%17 = bitcast float %div.i to i32
%18 = insertelement <4 x i32> undef, i32 %17, i64 0
%19 = shufflevector <4 x i32> %18, <4 x i32> undef, <4 x i32> zeroinitializer
%20 = bitcast <4 x i32> %19 to <4 x float>
%start2 = call i32 @llvm.start.loop.iterations.i32(i32 %4)
br label %do.body
do.body: ; preds = %do.body, %arm_mean_f32_mve.exit
%blkCnt.0 = phi i32 [ %blockSize, %arm_mean_f32_mve.exit ], [ %26, %do.body ]
%sumVec.0 = phi <4 x float> [ zeroinitializer, %arm_mean_f32_mve.exit ], [ %25, %do.body ]
%pSrc.addr.0 = phi float* [ %pSrc, %arm_mean_f32_mve.exit ], [ %add.ptr, %do.body ]
%21 = phi i32 [ %start2, %arm_mean_f32_mve.exit ], [ %27, %do.body ]
%pSrc.addr.01 = bitcast float* %pSrc.addr.0 to <4 x float>*
%22 = tail call <4 x i1> @llvm.arm.mve.vctp32(i32 %blkCnt.0)
%23 = tail call fast <4 x float> @llvm.masked.load.v4f32.p0v4f32(<4 x float>* %pSrc.addr.01, i32 4, <4 x i1> %22, <4 x float> zeroinitializer)
%24 = tail call fast <4 x float> @llvm.arm.mve.sub.predicated.v4f32.v4i1(<4 x float> %23, <4 x float> %20, <4 x i1> %22, <4 x float> undef)
%25 = tail call fast <4 x float> @llvm.arm.mve.fma.predicated.v4f32.v4i1(<4 x float> %24, <4 x float> %24, <4 x float> %sumVec.0, <4 x i1> %22)
%add.ptr = getelementptr inbounds float, float* %pSrc.addr.0, i32 4
%26 = add i32 %blkCnt.0, -4
%27 = call i32 @llvm.loop.decrement.reg.i32(i32 %21, i32 1)
%28 = icmp ne i32 %27, 0
br i1 %28, label %do.body, label %do.end
do.end: ; preds = %do.body
%29 = extractelement <4 x float> %25, i32 3
%add2.i = fadd fast float %29, %29
%sub2 = add i32 %blockSize, -1
%conv = uitofp i32 %sub2 to float
%div = fdiv fast float %add2.i, %conv
store float %div, float* %pResult, align 4
ret void
}
; Function Attrs: nounwind readnone
declare <4 x float> @llvm.arm.mve.sub.predicated.v4f32.v4i1(<4 x float>, <4 x float>, <4 x i1>, <4 x float>) #1
; Function Attrs: nounwind readnone
declare <4 x float> @llvm.arm.mve.fma.predicated.v4f32.v4i1(<4 x float>, <4 x float>, <4 x float>, <4 x i1>) #1
; Function Attrs: nounwind readnone
declare <4 x i1> @llvm.arm.mve.vctp32(i32) #1
; Function Attrs: argmemonly nounwind readonly willreturn
declare <4 x float> @llvm.masked.load.v4f32.p0v4f32(<4 x float>*, i32 immarg, <4 x i1>, <4 x float>) #2
; Function Attrs: nounwind readnone
declare <4 x float> @llvm.arm.mve.add.predicated.v4f32.v4i1(<4 x float>, <4 x float>, <4 x i1>, <4 x float>) #1
; Function Attrs: noduplicate nounwind
declare i32 @llvm.start.loop.iterations.i32(i32) #3
; Function Attrs: noduplicate nounwind
declare i32 @llvm.loop.decrement.reg.i32(i32, i32) #3
attributes #0 = { "target-features"="+mve.fp" }
attributes #1 = { nounwind readnone "target-features"="+mve.fp" }
attributes #2 = { argmemonly nounwind readonly willreturn "target-features"="+mve.fp" }
attributes #3 = { noduplicate nounwind }
...
---
name: arm_var_f32_mve
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: '$r2', virtual-reg: '' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 8
offsetAdjustment: 0
maxAlignment: 4
adjustsStack: false
hasCalls: false
stackProtector: ''
maxCallFrameSize: 0
cvBytesOfCalleeSavedRegisters: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
localFrameSize: 0
savePoint: ''
restorePoint: ''
fixedStack: []
stack:
- { id: 0, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '$lr', callee-saved-restored: false,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
- { id: 1, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4,
stack-id: default, callee-saved-register: '$r4', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites: []
constants: []
machineFunctionInfo: {}
body: |
; CHECK-LABEL: name: arm_var_f32_mve
; CHECK: bb.0.entry:
; CHECK: successors: %bb.1(0x80000000)
; CHECK: liveins: $lr, $r0, $r1, $r2, $r4
; CHECK: frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r4, killed $lr, implicit-def $sp, implicit $sp
; CHECK: frame-setup CFI_INSTRUCTION def_cfa_offset 8
; CHECK: frame-setup CFI_INSTRUCTION offset $lr, -4
; CHECK: frame-setup CFI_INSTRUCTION offset $r4, -8
; CHECK: renamable $q0 = MVE_VMOVimmi32 0, 0, $noreg, undef renamable $q0
; CHECK: $r3 = tMOVr $r1, 14 /* CC::al */, $noreg
; CHECK: $r12 = tMOVr $r0, 14 /* CC::al */, $noreg
; CHECK: $lr = MVE_DLSTP_32 killed renamable $r3
; CHECK: $r4 = tMOVr $lr, 14 /* CC::al */, $noreg
; CHECK: bb.1.do.body.i:
; CHECK: successors: %bb.1(0x7c000000), %bb.2(0x04000000)
; CHECK: liveins: $lr, $q0, $r0, $r1, $r2, $r4, $r12
; CHECK: renamable $r12, renamable $q1 = MVE_VLDRWU32_post killed renamable $r12, 16, 0, $noreg :: (load 16 from %ir.pSrc.addr.0.i2, align 4)
; CHECK: renamable $q0 = nnan ninf nsz arcp contract afn reassoc MVE_VADDf32 killed renamable $q0, killed renamable $q1, 0, killed $noreg, killed renamable $q0
; CHECK: $lr = MVE_LETP killed renamable $lr, %bb.1
; CHECK: bb.2.arm_mean_f32_mve.exit:
; CHECK: successors: %bb.3(0x80000000)
; CHECK: liveins: $q0, $r0, $r1, $r2, $r4
; CHECK: $s4 = VMOVSR $r1, 14 /* CC::al */, $noreg
; CHECK: dead $lr = tMOVr $r4, 14 /* CC::al */, $noreg
; CHECK: renamable $s0 = nnan ninf nsz arcp contract afn reassoc VADDS killed renamable $s3, killed renamable $s3, 14 /* CC::al */, $noreg, implicit killed $q0
; CHECK: $lr = t2DLS killed $r4
; CHECK: renamable $s4 = VUITOS killed renamable $s4, 14 /* CC::al */, $noreg
; CHECK: renamable $s0 = nnan ninf nsz arcp contract afn reassoc VDIVS killed renamable $s0, killed renamable $s4, 14 /* CC::al */, $noreg
; CHECK: renamable $r3 = VMOVRS killed renamable $s0, 14 /* CC::al */, $noreg
; CHECK: renamable $q0 = MVE_VMOVimmi32 0, 0, $noreg, undef renamable $q0
; CHECK: renamable $q1 = MVE_VDUP32 killed renamable $r3, 0, $noreg, undef renamable $q1
; CHECK: $r3 = tMOVr $r1, 14 /* CC::al */, $noreg
; CHECK: bb.3.do.body:
; CHECK: successors: %bb.3(0x7c000000), %bb.4(0x04000000)
; CHECK: liveins: $lr, $q0, $q1, $r0, $r1, $r2, $r3
; CHECK: renamable $vpr = MVE_VCTP32 renamable $r3, 0, $noreg
; CHECK: renamable $r3, dead $cpsr = tSUBi8 killed renamable $r3, 4, 14 /* CC::al */, $noreg
; CHECK: MVE_VPST 2, implicit $vpr
; CHECK: renamable $r0, renamable $q2 = MVE_VLDRWU32_post killed renamable $r0, 16, 1, renamable $vpr :: (load 16 from %ir.pSrc.addr.01, align 4)
; CHECK: renamable $q2 = nnan ninf nsz arcp contract afn reassoc MVE_VSUBf32 killed renamable $q2, renamable $q1, 1, renamable $vpr, undef renamable $q2
; CHECK: renamable $q0 = nnan ninf nsz arcp contract afn reassoc MVE_VFMAf32 killed renamable $q0, killed renamable $q2, killed renamable $q2, 1, killed renamable $vpr
; CHECK: $lr = t2LEUpdate killed renamable $lr, %bb.3
; CHECK: bb.4.do.end:
; CHECK: liveins: $q0, $r1, $r2
; CHECK: renamable $r0, dead $cpsr = tSUBi3 killed renamable $r1, 1, 14 /* CC::al */, $noreg
; CHECK: renamable $s0 = nnan ninf nsz arcp contract afn reassoc VADDS killed renamable $s3, killed renamable $s3, 14 /* CC::al */, $noreg, implicit killed $q0
; CHECK: $s2 = VMOVSR killed $r0, 14 /* CC::al */, $noreg
; CHECK: renamable $s2 = VUITOS killed renamable $s2, 14 /* CC::al */, $noreg
; CHECK: renamable $s0 = nnan ninf nsz arcp contract afn reassoc VDIVS killed renamable $s0, killed renamable $s2, 14 /* CC::al */, $noreg
; CHECK: VSTRS killed renamable $s0, killed renamable $r2, 0, 14 /* CC::al */, $noreg :: (store 4 into %ir.pResult)
; CHECK: frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r4, def $pc
bb.0.entry:
successors: %bb.1(0x80000000)
liveins: $r0, $r1, $r2, $r4, $lr
frame-setup tPUSH 14 /* CC::al */, $noreg, killed $r4, 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 $r4, -8
$r3 = tMOVr $r1, 14 /* CC::al */, $noreg
tCMPi8 renamable $r1, 4, 14 /* CC::al */, $noreg, implicit-def $cpsr
t2IT 10, 8, implicit-def $itstate
renamable $r3 = tMOVi8 $noreg, 4, 10 /* CC::ge */, killed $cpsr, implicit killed renamable $r3, implicit killed $itstate
renamable $r12 = t2MOVi 1, 14 /* CC::al */, $noreg, $noreg
renamable $r3, dead $cpsr = tSUBrr renamable $r1, killed renamable $r3, 14 /* CC::al */, $noreg
renamable $q0 = MVE_VMOVimmi32 0, 0, $noreg, undef renamable $q0
renamable $r3, dead $cpsr = tADDi8 killed renamable $r3, 3, 14 /* CC::al */, $noreg
renamable $lr = nuw nsw t2ADDrs killed renamable $r12, killed renamable $r3, 19, 14 /* CC::al */, $noreg, $noreg
$r3 = tMOVr $r1, 14 /* CC::al */, $noreg
$r12 = tMOVr $r0, 14 /* CC::al */, $noreg
$lr = t2DoLoopStart renamable $lr
$r4 = tMOVr $lr, 14 /* CC::al */, $noreg
bb.1.do.body.i:
successors: %bb.1(0x7c000000), %bb.2(0x04000000)
liveins: $lr, $q0, $r0, $r1, $r2, $r3, $r4, $r12
renamable $vpr = MVE_VCTP32 renamable $r3, 0, $noreg
renamable $r3, dead $cpsr = tSUBi8 killed renamable $r3, 4, 14 /* CC::al */, $noreg
renamable $lr = t2LoopDec killed renamable $lr, 1
MVE_VPST 4, implicit $vpr
renamable $r12, renamable $q1 = MVE_VLDRWU32_post killed renamable $r12, 16, 1, renamable $vpr :: (load 16 from %ir.pSrc.addr.0.i2, align 4)
renamable $q0 = nnan ninf nsz arcp contract afn reassoc MVE_VADDf32 killed renamable $q0, killed renamable $q1, 1, killed renamable $vpr, renamable $q0
t2LoopEnd renamable $lr, %bb.1, implicit-def dead $cpsr
tB %bb.2, 14 /* CC::al */, $noreg
bb.2.arm_mean_f32_mve.exit:
successors: %bb.3(0x80000000)
liveins: $q0, $r0, $r1, $r2, $r4
$s4 = VMOVSR $r1, 14 /* CC::al */, $noreg
$lr = tMOVr $r4, 14 /* CC::al */, $noreg
renamable $s0 = nnan ninf nsz arcp contract afn reassoc VADDS killed renamable $s3, renamable $s3, 14 /* CC::al */, $noreg, implicit $q0
$lr = t2DoLoopStart killed $r4
renamable $s4 = VUITOS killed renamable $s4, 14 /* CC::al */, $noreg
renamable $s0 = nnan ninf nsz arcp contract afn reassoc VDIVS killed renamable $s0, killed renamable $s4, 14 /* CC::al */, $noreg
renamable $r3 = VMOVRS killed renamable $s0, 14 /* CC::al */, $noreg
renamable $q0 = MVE_VMOVimmi32 0, 0, $noreg, undef renamable $q0
renamable $q1 = MVE_VDUP32 killed renamable $r3, 0, $noreg, undef renamable $q1
$r3 = tMOVr $r1, 14 /* CC::al */, $noreg
bb.3.do.body:
successors: %bb.3(0x7c000000), %bb.4(0x04000000)
liveins: $lr, $q0, $q1, $r0, $r1, $r2, $r3
renamable $vpr = MVE_VCTP32 renamable $r3, 0, $noreg
renamable $r3, dead $cpsr = tSUBi8 killed renamable $r3, 4, 14 /* CC::al */, $noreg
renamable $lr = t2LoopDec killed renamable $lr, 1
MVE_VPST 2, implicit $vpr
renamable $r0, renamable $q2 = MVE_VLDRWU32_post killed renamable $r0, 16, 1, renamable $vpr :: (load 16 from %ir.pSrc.addr.01, align 4)
renamable $q2 = nnan ninf nsz arcp contract afn reassoc MVE_VSUBf32 killed renamable $q2, renamable $q1, 1, renamable $vpr, undef renamable $q2
renamable $q0 = nnan ninf nsz arcp contract afn reassoc MVE_VFMAf32 killed renamable $q0, killed renamable $q2, renamable $q2, 1, killed renamable $vpr
t2LoopEnd renamable $lr, %bb.3, implicit-def dead $cpsr
tB %bb.4, 14 /* CC::al */, $noreg
bb.4.do.end:
liveins: $q0, $r1, $r2
renamable $r0, dead $cpsr = tSUBi3 killed renamable $r1, 1, 14 /* CC::al */, $noreg
renamable $s0 = nnan ninf nsz arcp contract afn reassoc VADDS killed renamable $s3, renamable $s3, 14 /* CC::al */, $noreg, implicit $q0
$s2 = VMOVSR killed $r0, 14 /* CC::al */, $noreg
renamable $s2 = VUITOS killed renamable $s2, 14 /* CC::al */, $noreg
renamable $s0 = nnan ninf nsz arcp contract afn reassoc VDIVS killed renamable $s0, killed renamable $s2, 14 /* CC::al */, $noreg
VSTRS killed renamable $s0, killed renamable $r2, 0, 14 /* CC::al */, $noreg :: (store 4 into %ir.pResult)
frame-destroy tPOP_RET 14 /* CC::al */, $noreg, def $r4, def $pc
...