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120
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1 ; RUN: llc -march=hexagon -hexagon-small-data-threshold=0 -disable-hexagon-amodeopt < %s | FileCheck %s --check-prefix=CHECK-NO-AMODE
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2 ; RUN: llc -march=hexagon -hexagon-small-data-threshold=0 -disable-hexagon-amodeopt=0 -hexagon-amode-growth-limit=4 < %s | FileCheck %s --check-prefix=CHECK-AMODE
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3
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4 ; CHECK-NO-AMODE: [[REG0:(r[0-9]+)]] = ##global_2
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121
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5 ; CHECK-NO-AMODE: memw([[REG0]]+{{.*}}<<#2) =
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120
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6
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7 ; CHECK-AMODE: [[REG1:(r[0-9]+)]] = memw(##global_1)
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121
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8 ; CHECK-AMODE: memw([[REG1]]<<#2+##global_2) =
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120
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9
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10 @global_1 = external global i32, align 4
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11 @global_2 = external global [128 x i32], align 8
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12
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13 declare i32 @foo(i32, i32) #0
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14
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15 define i32 @fred(i32 %a0, i32 %a1, i32* %p) #0 {
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16 entry:
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17 %call24 = tail call i32 @foo(i32 %a0, i32 1) #0
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18 %tobool26 = icmp eq i32 %call24, 0
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19 br i1 %tobool26, label %while.end, label %while.body.lr.ph
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20
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21 while.body.lr.ph: ; preds = %entry
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22 %cmp3 = icmp sgt i32 %a1, 19
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23 %sub = sub nsw i32 19, %a0
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24 %xor = xor i32 %a0, 1
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25 br i1 %cmp3, label %while.body.us.preheader, label %while.body.preheader
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26
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27 while.body.preheader: ; preds = %while.body.lr.ph
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28 br label %while.body
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29
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30 while.body.us.preheader: ; preds = %while.body.lr.ph
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31 br label %while.body.us
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32
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33 while.body.us: ; preds = %while.body.us.preheader, %while.cond.backedge.us
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34 %call27.us = phi i32 [ %call.us, %while.cond.backedge.us ], [ %call24, %while.body.us.preheader ]
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35 %x0 = load i32, i32* %p, align 4, !tbaa !4
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36 %cmp.us = icmp sgt i32 %x0, 0
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37 br i1 %cmp.us, label %if.then.us, label %if.end.us
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38
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39 if.then.us: ; preds = %while.body.us
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40 %sext.us = shl i32 %call27.us, 24
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41 %conv2.us = ashr i32 %sext.us, 24
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42 %x10 = tail call i32 @foo(i32 %conv2.us, i32 %sext.us) #0
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43 br label %if.end.us
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44
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45 if.end.us: ; preds = %if.then.us, %while.body.us
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46 %x1 = load i32, i32* %p, align 4, !tbaa !4
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47 %call8.us = tail call i32 @foo(i32 %sub, i32 %a1) #0
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48 %tobool11.us = icmp eq i32 %call8.us, 0
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49 br i1 %tobool11.us, label %while.cond.backedge.us, label %if.then12.us
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50
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51 if.then12.us: ; preds = %if.end.us
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52 %x3 = load i32, i32* %p, align 4, !tbaa !4
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53 %sub13.us = sub i32 %x3, %x1
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54 %x4 = load i32, i32* @global_1, align 4, !tbaa !4
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55 %arrayidx.us = getelementptr inbounds [128 x i32], [128 x i32]* @global_2, i32 0, i32 %x4
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56 store i32 %sub13.us, i32* %arrayidx.us, align 4, !tbaa !4
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57 br label %while.cond.backedge.us
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58
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59 while.cond.backedge.us: ; preds = %if.then12.us, %if.end.us
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60 %call.us = tail call i32 @foo(i32 %a0, i32 2) #0
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61 %tobool.us = icmp eq i32 %call.us, 0
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62 br i1 %tobool.us, label %while.end.loopexit, label %while.body.us
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63
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64 while.body: ; preds = %while.body.preheader, %while.cond.backedge
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65 %call27 = phi i32 [ %call, %while.cond.backedge ], [ %call24, %while.body.preheader ]
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66 %x5 = load i32, i32* %p, align 4, !tbaa !4
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67 %cmp = icmp sgt i32 %x5, 0
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68 br i1 %cmp, label %if.then, label %if.end
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69
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70 if.then: ; preds = %while.body
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71 %sext = shl i32 %call27, 24
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72 %conv2 = ashr i32 %sext, 24
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73 %x11 = tail call i32 @foo(i32 %conv2, i32 %sext) #0
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74 br label %if.end
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75
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76 if.end: ; preds = %if.then, %while.body
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77 %tobool11 = icmp eq i32 %call27, 0
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78 br i1 %tobool11, label %while.cond.backedge, label %if.then12
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79
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80 if.then12: ; preds = %if.end
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81 %x7 = load i32, i32* @global_1, align 4, !tbaa !4
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82 %arrayidx = getelementptr inbounds [128 x i32], [128 x i32]* @global_2, i32 0, i32 %x7
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83 store i32 0, i32* %arrayidx, align 4, !tbaa !4
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84 br label %while.cond.backedge
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85
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86 while.cond.backedge: ; preds = %if.then12, %if.end
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87 %call = tail call i32 @foo(i32 %a0, i32 3) #0
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88 %tobool = icmp eq i32 %call, 0
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89 br i1 %tobool, label %while.end.loopexit33, label %while.body
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90
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91 while.end.loopexit: ; preds = %while.cond.backedge.us
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92 br label %while.end
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93
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94 while.end.loopexit33: ; preds = %while.cond.backedge
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95 br label %while.end
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96
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97 while.end: ; preds = %while.end.loopexit33, %while.end.loopexit, %entry
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98 ret i32 0
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99 }
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100
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101 attributes #0 = { nounwind }
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102
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103 !1 = !{!2, !2, i64 0}
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104 !2 = !{!"omnipotent char", !3, i64 0}
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105 !3 = !{!"Simple C/C++ TBAA"}
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106 !4 = !{!5, !5, i64 0}
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107 !5 = !{!"int", !2, i64 0}
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