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annotate test/CodeGen/ARM/tail-opts.ll @ 100:7d135dc70f03

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LLVM 3.9
author Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
date Tue, 26 Jan 2016 22:53:40 +0900
parents 95c75e76d11b
children 803732b1fca8
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: llc < %s -mtriple=arm-apple-darwin -relocation-model=dynamic-no-pic -mcpu=cortex-a8 -asm-verbose=false | FileCheck %s
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2
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3 declare void @bar(i32)
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4 declare void @car(i32)
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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5 declare void @dar(i32)
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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6 declare void @ear(i32)
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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7 declare void @far(i32)
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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8 declare i1 @qux()
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9
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10 @GHJK = global i32 0
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11
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12 declare i8* @choose(i8*, i8*)
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13
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14 ; BranchFolding should tail-duplicate the indirect jump to avoid
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15 ; redundant branching.
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16
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17 ; CHECK-LABEL: tail_duplicate_me:
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18 ; CHECK: qux
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19 ; CHECK: movw r{{[0-9]+}}, :lower16:_GHJK
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20 ; CHECK: movt r{{[0-9]+}}, :upper16:_GHJK
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21 ; CHECK: str r
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22 ; CHECK-NEXT: bx r
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23 ; CHECK: qux
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24 ; CHECK: movw r{{[0-9]+}}, :lower16:_GHJK
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25 ; CHECK: movt r{{[0-9]+}}, :upper16:_GHJK
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26 ; CHECK: str r
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27 ; CHECK-NEXT: bx r
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28 ; CHECK: movw r{{[0-9]+}}, :lower16:_GHJK
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29 ; CHECK: movt r{{[0-9]+}}, :upper16:_GHJK
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30 ; CHECK: str r
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31 ; CHECK-NEXT: bx r
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32
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33 define void @tail_duplicate_me() nounwind {
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34 entry:
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35 %a = call i1 @qux()
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36 %c = call i8* @choose(i8* blockaddress(@tail_duplicate_me, %return),
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37 i8* blockaddress(@tail_duplicate_me, %altret))
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38 br i1 %a, label %A, label %next
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39 next:
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40 %b = call i1 @qux()
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41 br i1 %b, label %B, label %C
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42
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43 A:
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44 call void @bar(i32 0)
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45 store i32 0, i32* @GHJK
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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46 br label %M
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47
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48 B:
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49 call void @car(i32 1)
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50 store i32 0, i32* @GHJK
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51 br label %M
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52
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53 C:
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54 call void @dar(i32 2)
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55 store i32 0, i32* @GHJK
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56 br label %M
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57
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58 M:
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59 indirectbr i8* %c, [label %return, label %altret]
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60
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61 return:
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62 call void @ear(i32 1000)
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63 ret void
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64 altret:
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65 call void @far(i32 1001)
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66 ret void
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67 }