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| 1 | +; XFAIL: * |
| 2 | +; RUN: opt < %s -basicaa -newgvn -S | FileCheck %s |
| 3 | + |
| 4 | +@a = external global i32 ; <i32*> [#uses=7] |
| 5 | + |
| 6 | +;; NewGVN takes two passes to get this, because we prune predicateinfo |
| 7 | +; CHECK-LABEL: @test1( |
| 8 | +define i32 @test1() nounwind { |
| 9 | +entry: |
| 10 | + %0 = load i32, i32* @a, align 4 |
| 11 | + %1 = icmp eq i32 %0, 4 |
| 12 | + br i1 %1, label %bb, label %bb1 |
| 13 | + |
| 14 | +bb: ; preds = %entry |
| 15 | + br label %bb8 |
| 16 | + |
| 17 | +bb1: ; preds = %entry |
| 18 | + %2 = load i32, i32* @a, align 4 |
| 19 | + %3 = icmp eq i32 %2, 5 |
| 20 | + br i1 %3, label %bb2, label %bb3 |
| 21 | + |
| 22 | +bb2: ; preds = %bb1 |
| 23 | + br label %bb8 |
| 24 | + |
| 25 | +bb3: ; preds = %bb1 |
| 26 | + %4 = load i32, i32* @a, align 4 |
| 27 | + %5 = icmp eq i32 %4, 4 |
| 28 | +; CHECK: br i1 false, label %bb4, label %bb5 |
| 29 | + br i1 %5, label %bb4, label %bb5 |
| 30 | + |
| 31 | +bb4: ; preds = %bb3 |
| 32 | + %6 = load i32, i32* @a, align 4 |
| 33 | + %7 = add i32 %6, 5 |
| 34 | + br label %bb8 |
| 35 | + |
| 36 | +bb5: ; preds = %bb3 |
| 37 | + %8 = load i32, i32* @a, align 4 |
| 38 | + %9 = icmp eq i32 %8, 5 |
| 39 | +; CHECK: br i1 false, label %bb6, label %bb7 |
| 40 | + br i1 %9, label %bb6, label %bb7 |
| 41 | + |
| 42 | +bb6: ; preds = %bb5 |
| 43 | + %10 = load i32, i32* @a, align 4 |
| 44 | + %11 = add i32 %10, 4 |
| 45 | + br label %bb8 |
| 46 | + |
| 47 | +bb7: ; preds = %bb5 |
| 48 | + %12 = load i32, i32* @a, align 4 |
| 49 | + br label %bb8 |
| 50 | + |
| 51 | +bb8: ; preds = %bb7, %bb6, %bb4, %bb2, %bb |
| 52 | + %.0 = phi i32 [ %12, %bb7 ], [ %11, %bb6 ], [ %7, %bb4 ], [ 4, %bb2 ], [ 5, %bb ] |
| 53 | + br label %return |
| 54 | + |
| 55 | +return: ; preds = %bb8 |
| 56 | + ret i32 %.0 |
| 57 | +} |
| 58 | +;; NewGVN takes two passes to get test[6,8] and test[6,8]_fp's main part |
| 59 | +;; The icmp ne requires an equality table that inserts the inequalities for each |
| 60 | +;; discovered equality while processing. |
| 61 | +; CHECK-LABEL: @test6( |
| 62 | +define i1 @test6(i32 %x, i32 %y) { |
| 63 | + %cmp2 = icmp ne i32 %x, %y |
| 64 | + %cmp = icmp eq i32 %x, %y |
| 65 | + %cmp3 = icmp eq i32 %x, %y |
| 66 | + br i1 %cmp, label %same, label %different |
| 67 | + |
| 68 | +same: |
| 69 | +; CHECK: ret i1 false |
| 70 | + ret i1 %cmp2 |
| 71 | + |
| 72 | +different: |
| 73 | +; CHECK: ret i1 false |
| 74 | + ret i1 %cmp3 |
| 75 | +} |
| 76 | + |
| 77 | +; CHECK-LABEL: @test6_fp( |
| 78 | +define i1 @test6_fp(float %x, float %y) { |
| 79 | + %cmp2 = fcmp une float %x, %y |
| 80 | + %cmp = fcmp oeq float %x, %y |
| 81 | + %cmp3 = fcmp oeq float %x, %y |
| 82 | + br i1 %cmp, label %same, label %different |
| 83 | + |
| 84 | +same: |
| 85 | +; CHECK: ret i1 false |
| 86 | + ret i1 %cmp2 |
| 87 | + |
| 88 | +different: |
| 89 | +; CHECK: ret i1 false |
| 90 | + ret i1 %cmp3 |
| 91 | +} |
| 92 | +; CHECK-LABEL: @test8( |
| 93 | +define i1 @test8(i32 %x, i32 %y) { |
| 94 | + %cmp2 = icmp sle i32 %x, %y |
| 95 | + %cmp = icmp sgt i32 %x, %y |
| 96 | + %cmp3 = icmp sgt i32 %x, %y |
| 97 | + br i1 %cmp, label %same, label %different |
| 98 | + |
| 99 | +same: |
| 100 | +; CHECK: ret i1 false |
| 101 | + ret i1 %cmp2 |
| 102 | + |
| 103 | +different: |
| 104 | +; CHECK: ret i1 false |
| 105 | + ret i1 %cmp3 |
| 106 | +} |
| 107 | + |
| 108 | +; CHECK-LABEL: @test8_fp( |
| 109 | +define i1 @test8_fp(float %x, float %y) { |
| 110 | + %cmp2 = fcmp ule float %x, %y |
| 111 | + %cmp = fcmp ogt float %x, %y |
| 112 | + %cmp3 = fcmp ogt float %x, %y |
| 113 | + br i1 %cmp, label %same, label %different |
| 114 | + |
| 115 | +same: |
| 116 | +; CHECK: ret i1 false |
| 117 | + ret i1 %cmp2 |
| 118 | + |
| 119 | +different: |
| 120 | +; CHECK: ret i1 false |
| 121 | + ret i1 %cmp3 |
| 122 | +} |
| 123 | + |
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