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annotate test/CodeGen/Thumb2/thumb2-ifcvt1-tc.ll @ 95:afa8332a0e37

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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
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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1 ; RUN: llc < %s -mtriple=thumbv7-apple-darwin | FileCheck %s
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2 ; XFAIL: *
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3
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4 define i32 @t1(i32 %a, i32 %b, i32 %c, i32 %d) nounwind {
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5 ; CHECK-LABEL: t1:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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6 ; CHECK: it ne
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7 ; CHECK: cmpne
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8 switch i32 %c, label %cond_next [
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9 i32 1, label %cond_true
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10 i32 7, label %cond_true
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11 ]
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12
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13 cond_true:
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14 %tmp12 = add i32 %a, 1
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15 %tmp1518 = add i32 %tmp12, %b
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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16 ret i32 %tmp1518
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17
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18 cond_next:
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19 %tmp15 = add i32 %b, %a
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20 ret i32 %tmp15
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21 }
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22
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23 ; FIXME: Check for # of unconditional branch after adding branch folding post ifcvt.
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24 define i32 @t2(i32 %a, i32 %b) nounwind {
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25 entry:
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26 ; CHECK-LABEL: t2:
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27 ; CHECK: ite gt
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28 ; CHECK: subgt
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29 ; CHECK: suble
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30 %tmp1434 = icmp eq i32 %a, %b ; <i1> [#uses=1]
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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31 br i1 %tmp1434, label %bb17, label %bb.outer
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32
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33 bb.outer: ; preds = %cond_false, %entry
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34 %b_addr.021.0.ph = phi i32 [ %b, %entry ], [ %tmp10, %cond_false ] ; <i32> [#uses=5]
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35 %a_addr.026.0.ph = phi i32 [ %a, %entry ], [ %a_addr.026.0, %cond_false ] ; <i32> [#uses=1]
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36 br label %bb
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37
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38 bb: ; preds = %cond_true, %bb.outer
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39 %indvar = phi i32 [ 0, %bb.outer ], [ %indvar.next, %cond_true ] ; <i32> [#uses=2]
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40 %tmp. = sub i32 0, %b_addr.021.0.ph ; <i32> [#uses=1]
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41 %tmp.40 = mul i32 %indvar, %tmp. ; <i32> [#uses=1]
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42 %a_addr.026.0 = add i32 %tmp.40, %a_addr.026.0.ph ; <i32> [#uses=6]
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43 %tmp3 = icmp sgt i32 %a_addr.026.0, %b_addr.021.0.ph ; <i1> [#uses=1]
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44 br i1 %tmp3, label %cond_true, label %cond_false
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45
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46 cond_true: ; preds = %bb
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47 %tmp7 = sub i32 %a_addr.026.0, %b_addr.021.0.ph ; <i32> [#uses=2]
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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48 %tmp1437 = icmp eq i32 %tmp7, %b_addr.021.0.ph ; <i1> [#uses=1]
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49 %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1]
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50 br i1 %tmp1437, label %bb17, label %bb
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51
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52 cond_false: ; preds = %bb
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53 %tmp10 = sub i32 %b_addr.021.0.ph, %a_addr.026.0 ; <i32> [#uses=2]
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54 %tmp14 = icmp eq i32 %a_addr.026.0, %tmp10 ; <i1> [#uses=1]
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55 br i1 %tmp14, label %bb17, label %bb.outer
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56
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57 bb17: ; preds = %cond_false, %cond_true, %entry
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58 %a_addr.026.1 = phi i32 [ %a, %entry ], [ %tmp7, %cond_true ], [ %a_addr.026.0, %cond_false ] ; <i32> [#uses=1]
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59 ret i32 %a_addr.026.1
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60 }
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61
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62 @x = external global i32* ; <i32**> [#uses=1]
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63
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64 define void @foo(i32 %a) nounwind {
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65 entry:
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afa8332a0e37 LLVM 3.8
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66 %tmp = load i32*, i32** @x ; <i32*> [#uses=1]
0
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67 store i32 %a, i32* %tmp
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68 ret void
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69 }
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70
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71 ; Tail call prevents use of ifcvt in this one. Seems like a win though.
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72 define void @t3(i32 %a, i32 %b) nounwind {
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73 entry:
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74 ; CHECK-LABEL: t3:
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75 ; CHECK-NOT: it lt
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76 ; CHECK-NOT: poplt
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77 ; CHECK: b.w _foo @ TAILCALL
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78 %tmp1 = icmp sgt i32 %a, 10 ; <i1> [#uses=1]
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79 br i1 %tmp1, label %cond_true, label %UnifiedReturnBlock
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80
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81 cond_true: ; preds = %entry
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82 tail call void @foo( i32 %b )
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83 ret void
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84
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85 UnifiedReturnBlock: ; preds = %entry
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86 ret void
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87 }