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annotate test/CodeGen/AArch64/arm64-scaled_iv.ll @ 117:facf19d07cd9

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author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Wed, 24 Aug 2016 20:10:41 +0900
parents afa8332a0e37
children
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54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: opt -S -loop-reduce < %s | FileCheck %s
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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2 ; Scaling factor in addressing mode are costly.
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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3 ; Make loop-reduce prefer unscaled accesses.
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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4 ; <rdar://problem/13806271>
54457678186b LLVM 3.6
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5 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n32:64-S128"
54457678186b LLVM 3.6
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6 target triple = "arm64-apple-ios7.0.0"
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7
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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8 ; Function Attrs: nounwind ssp
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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9 define void @mulDouble(double* nocapture %a, double* nocapture %b, double* nocapture %c) {
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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10 ; CHECK: @mulDouble
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11 entry:
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12 br label %for.body
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13
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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14 for.body: ; preds = %for.body, %entry
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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15 ; CHECK: [[IV:%[^ ]+]] = phi i64 [ [[IVNEXT:%[^,]+]], %for.body ], [ 0, %entry ]
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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16 ; Only one induction variable should have been generated.
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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17 ; CHECK-NOT: phi
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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18 %indvars.iv = phi i64 [ 1, %entry ], [ %indvars.iv.next, %for.body ]
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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19 %tmp = add nsw i64 %indvars.iv, -1
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afa8332a0e37 LLVM 3.8
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 83
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20 %arrayidx = getelementptr inbounds double, double* %b, i64 %tmp
afa8332a0e37 LLVM 3.8
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents: 83
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21 %tmp1 = load double, double* %arrayidx, align 8
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54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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22 ; The induction variable should carry the scaling factor: 1 * 8 = 8.
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afa8332a0e37 LLVM 3.8
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parents: 83
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23 ; CHECK: [[IVNEXT]] = add nuw nsw i64 [[IV]], 8
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24 %indvars.iv.next = add i64 %indvars.iv, 1
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25 %arrayidx2 = getelementptr inbounds double, double* %c, i64 %indvars.iv.next
afa8332a0e37 LLVM 3.8
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parents: 83
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26 %tmp2 = load double, double* %arrayidx2, align 8
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54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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27 %mul = fmul double %tmp1, %tmp2
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afa8332a0e37 LLVM 3.8
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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28 %arrayidx4 = getelementptr inbounds double, double* %a, i64 %indvars.iv
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54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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29 store double %mul, double* %arrayidx4, align 8
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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30 %lftr.wideiv = trunc i64 %indvars.iv.next to i32
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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31 ; Comparison should be 19 * 8 = 152.
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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32 ; CHECK: icmp eq i32 {{%[^,]+}}, 152
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33 %exitcond = icmp eq i32 %lftr.wideiv, 20
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34 br i1 %exitcond, label %for.end, label %for.body
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35
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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36 for.end: ; preds = %for.body
54457678186b LLVM 3.6
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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37 ret void
54457678186b LLVM 3.6
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38 }