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annotate test/CodeGen/X86/nobt.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 803732b1fca8
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1 ; RUN: llc < %s -march=x86 | not grep btl
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2
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3 ; This tests some cases where BT must not be generated. See also bt.ll.
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4 ; Fixes 20040709-[12].c in gcc testsuite.
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5
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6 define void @test2(i32 %x, i32 %n) nounwind {
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7 entry:
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8 %tmp1 = and i32 %x, 1
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9 %tmp2 = urem i32 %tmp1, 15
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10 %tmp3 = and i32 %tmp2, 1 ; <i32> [#uses=1]
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11 %tmp4 = icmp eq i32 %tmp3, %tmp2 ; <i1> [#uses=1]
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12 br i1 %tmp4, label %bb, label %UnifiedReturnBlock
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13
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14 bb: ; preds = %entry
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15 call void @foo()
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16 ret void
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17
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18 UnifiedReturnBlock: ; preds = %entry
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19 ret void
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20 }
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21
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22 define void @test3(i32 %x, i32 %n) nounwind {
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23 entry:
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24 %tmp1 = and i32 %x, 1
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25 %tmp2 = urem i32 %tmp1, 15
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26 %tmp3 = and i32 %tmp2, 1 ; <i32> [#uses=1]
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27 %tmp4 = icmp eq i32 %tmp2, %tmp3 ; <i1> [#uses=1]
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28 br i1 %tmp4, label %bb, label %UnifiedReturnBlock
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29
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30 bb: ; preds = %entry
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31 call void @foo()
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32 ret void
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33
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34 UnifiedReturnBlock: ; preds = %entry
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35 ret void
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36 }
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37
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38 define void @test4(i32 %x, i32 %n) nounwind {
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39 entry:
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40 %tmp1 = and i32 %x, 1
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41 %tmp2 = urem i32 %tmp1, 15
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42 %tmp3 = and i32 %tmp2, 1 ; <i32> [#uses=1]
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43 %tmp4 = icmp ne i32 %tmp2, %tmp3 ; <i1> [#uses=1]
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44 br i1 %tmp4, label %bb, label %UnifiedReturnBlock
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45
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46 bb: ; preds = %entry
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47 call void @foo()
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48 ret void
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49
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50 UnifiedReturnBlock: ; preds = %entry
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51 ret void
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52 }
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54 define void @test5(i32 %x, i32 %n) nounwind {
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55 entry:
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56 %tmp1 = and i32 %x, 1
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57 %tmp2 = urem i32 %tmp1, 15
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58 %tmp3 = and i32 %tmp2, 1 ; <i32> [#uses=1]
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59 %tmp4 = icmp ne i32 %tmp2, %tmp3 ; <i1> [#uses=1]
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60 br i1 %tmp4, label %bb, label %UnifiedReturnBlock
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61
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62 bb: ; preds = %entry
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63 call void @foo()
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64 ret void
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65
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66 UnifiedReturnBlock: ; preds = %entry
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67 ret void
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68 }
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69
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70 declare void @foo()