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annotate test/CodeGen/X86/fp-une-cmp.ll @ 95:afa8332a0e37 LLVM3.8

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LLVM 3.8
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Tue, 13 Oct 2015 17:48:58 +0900
parents 95c75e76d11b
children 1172e4bd9c6f
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: llc < %s -march=x86 -mattr=sse4.1 | FileCheck %s
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2 ; <rdar://problem/7859988>
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3
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4 ; Make sure we don't generate more jumps than we need to. We used to generate
95c75e76d11b LLVM 3.4
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5 ; something like this:
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6 ;
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7 ; jne LBB0_1
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8 ; jnp LBB0_2
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9 ; LBB0_1:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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10 ; jmp LBB0_3
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11 ; LBB0_2:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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12 ; addsd ...
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13 ; LBB0_3:
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14 ;
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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15 ; Now we generate this:
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16 ;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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17 ; jne LBB0_2
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18 ; jp LBB0_2
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19 ; addsd ...
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20 ; LBB0_2:
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21
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22 ; CHECK: func
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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23 ; CHECK: jne [[LABEL:.*]]
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24 ; CHECK-NEXT: jp [[LABEL]]
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25 ; CHECK-NOT: jmp
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26
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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27 define float @func(float %x, float %y) nounwind readnone optsize ssp {
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28 entry:
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29 %0 = fpext float %x to double
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30 %1 = fpext float %y to double
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31 %2 = fmul double %0, %1
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32 %3 = fcmp une double %2, 0.000000e+00
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33 br i1 %3, label %bb2, label %bb1
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34
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35 bb1:
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36 %4 = fadd double %2, -1.000000e+00
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37 br label %bb2
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38
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39 bb2:
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40 %.0.in = phi double [ %4, %bb1 ], [ %2, %entry ]
95c75e76d11b LLVM 3.4
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41 %.0 = fptrunc double %.0.in to float
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42 ret float %.0
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43 }