| Owen Anderson | 5ab8d4b | 2010-12-21 23:54:34 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -basicaa -gvn -S | FileCheck %s |
| 2 | |
| 3 | @a = external global i32 ; <i32*> [#uses=7] |
| 4 | |
| Duncan Sands | f4f47cc | 2011-10-05 14:28:49 +0000 | [diff] [blame] | 5 | ; CHECK: @test1 |
| 6 | define i32 @test1() nounwind { |
| Owen Anderson | 5ab8d4b | 2010-12-21 23:54:34 +0000 | [diff] [blame] | 7 | entry: |
| 8 | %0 = load i32* @a, align 4 |
| 9 | %1 = icmp eq i32 %0, 4 |
| 10 | br i1 %1, label %bb, label %bb1 |
| 11 | |
| 12 | bb: ; preds = %entry |
| 13 | br label %bb8 |
| 14 | |
| 15 | bb1: ; preds = %entry |
| 16 | %2 = load i32* @a, align 4 |
| 17 | %3 = icmp eq i32 %2, 5 |
| 18 | br i1 %3, label %bb2, label %bb3 |
| 19 | |
| 20 | bb2: ; preds = %bb1 |
| 21 | br label %bb8 |
| 22 | |
| 23 | bb3: ; preds = %bb1 |
| 24 | %4 = load i32* @a, align 4 |
| 25 | %5 = icmp eq i32 %4, 4 |
| 26 | ; CHECK: br i1 false, label %bb4, label %bb5 |
| 27 | br i1 %5, label %bb4, label %bb5 |
| 28 | |
| 29 | bb4: ; preds = %bb3 |
| 30 | %6 = load i32* @a, align 4 |
| 31 | %7 = add i32 %6, 5 |
| 32 | br label %bb8 |
| 33 | |
| 34 | bb5: ; preds = %bb3 |
| 35 | %8 = load i32* @a, align 4 |
| 36 | %9 = icmp eq i32 %8, 5 |
| 37 | ; CHECK: br i1 false, label %bb6, label %bb7 |
| 38 | br i1 %9, label %bb6, label %bb7 |
| 39 | |
| 40 | bb6: ; preds = %bb5 |
| 41 | %10 = load i32* @a, align 4 |
| 42 | %11 = add i32 %10, 4 |
| 43 | br label %bb8 |
| 44 | |
| 45 | bb7: ; preds = %bb5 |
| 46 | %12 = load i32* @a, align 4 |
| 47 | br label %bb8 |
| 48 | |
| 49 | bb8: ; preds = %bb7, %bb6, %bb4, %bb2, %bb |
| 50 | %.0 = phi i32 [ %12, %bb7 ], [ %11, %bb6 ], [ %7, %bb4 ], [ 4, %bb2 ], [ 5, %bb ] |
| 51 | br label %return |
| 52 | |
| 53 | return: ; preds = %bb8 |
| 54 | ret i32 %.0 |
| Duncan Sands | e90dd05 | 2011-10-05 14:17:01 +0000 | [diff] [blame] | 55 | } |
| 56 | |
| Duncan Sands | f4f47cc | 2011-10-05 14:28:49 +0000 | [diff] [blame] | 57 | declare void @foo(i1) |
| Duncan Sands | f4f47cc | 2011-10-05 14:28:49 +0000 | [diff] [blame] | 58 | declare void @bar(i32) |
| 59 | |
| 60 | ; CHECK: @test3 |
| 61 | define void @test3(i32 %x, i32 %y) { |
| 62 | %xz = icmp eq i32 %x, 0 |
| 63 | %yz = icmp eq i32 %y, 0 |
| 64 | %z = and i1 %xz, %yz |
| 65 | br i1 %z, label %both_zero, label %nope |
| 66 | both_zero: |
| 67 | call void @foo(i1 %xz) |
| 68 | ; CHECK: call void @foo(i1 true) |
| 69 | call void @foo(i1 %yz) |
| 70 | ; CHECK: call void @foo(i1 true) |
| 71 | call void @bar(i32 %x) |
| 72 | ; CHECK: call void @bar(i32 0) |
| 73 | call void @bar(i32 %y) |
| 74 | ; CHECK: call void @bar(i32 0) |
| 75 | ret void |
| 76 | nope: |
| 77 | call void @foo(i1 %z) |
| 78 | ; CHECK: call void @foo(i1 false) |
| 79 | ret void |
| 80 | } |
| Duncan Sands | c52af46 | 2011-10-07 08:29:06 +0000 | [diff] [blame] | 81 | |
| 82 | ; CHECK: @test4 |
| 83 | define void @test4(i1 %b, i32 %x) { |
| 84 | br i1 %b, label %sw, label %case3 |
| 85 | sw: |
| 86 | switch i32 %x, label %default [ |
| 87 | i32 0, label %case0 |
| 88 | i32 1, label %case1 |
| 89 | i32 2, label %case0 |
| 90 | i32 3, label %case3 |
| 91 | i32 4, label %default |
| 92 | ] |
| 93 | default: |
| 94 | ; CHECK: default: |
| 95 | call void @bar(i32 %x) |
| 96 | ; CHECK: call void @bar(i32 %x) |
| 97 | ret void |
| 98 | case0: |
| 99 | ; CHECK: case0: |
| 100 | call void @bar(i32 %x) |
| 101 | ; CHECK: call void @bar(i32 %x) |
| 102 | ret void |
| 103 | case1: |
| 104 | ; CHECK: case1: |
| 105 | call void @bar(i32 %x) |
| 106 | ; CHECK: call void @bar(i32 1) |
| 107 | ret void |
| 108 | case3: |
| 109 | ; CHECK: case3: |
| 110 | call void @bar(i32 %x) |
| 111 | ; CHECK: call void @bar(i32 %x) |
| 112 | ret void |
| 113 | } |