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| 1 | +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5 |
| 2 | +; RUN: opt < %s -passes=instsimplify -S | FileCheck %s |
| 3 | + |
| 4 | +define i32 @known_non_zero_by_or(i32 %x, i32 %y) { |
| 5 | +; CHECK-LABEL: define i32 @known_non_zero_by_or( |
| 6 | +; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) { |
| 7 | +; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[X]], 0 |
| 8 | +; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]] |
| 9 | +; CHECK: [[IF_THEN]]: |
| 10 | +; CHECK-NEXT: [[VAL:%.*]] = or i32 [[X]], [[Y]] |
| 11 | +; CHECK-NEXT: ret i32 [[VAL]] |
| 12 | +; CHECK: [[IF_ELSE]]: |
| 13 | +; CHECK-NEXT: ret i32 0 |
| 14 | +; |
| 15 | + %cond = icmp ne i32 %x, 0 |
| 16 | + br i1 %cond, label %if.then, label %if.else |
| 17 | + |
| 18 | +if.then: |
| 19 | + %val = or i32 %x, %y |
| 20 | + %max = call i32 @llvm.umax.i32(i32 %val, i32 1) |
| 21 | + ret i32 %max |
| 22 | + |
| 23 | +if.else: |
| 24 | + ret i32 0 |
| 25 | +} |
| 26 | + |
| 27 | +define i32 @known_non_zero_by_mul(i32 %x) { |
| 28 | +; CHECK-LABEL: define i32 @known_non_zero_by_mul( |
| 29 | +; CHECK-SAME: i32 [[X:%.*]]) { |
| 30 | +; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[X]], 0 |
| 31 | +; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]] |
| 32 | +; CHECK: [[IF_THEN]]: |
| 33 | +; CHECK-NEXT: [[NONZERO1:%.*]] = mul nuw i32 [[X]], 3 |
| 34 | +; CHECK-NEXT: ret i32 [[NONZERO1]] |
| 35 | +; CHECK: [[IF_ELSE]]: |
| 36 | +; CHECK-NEXT: ret i32 0 |
| 37 | +; |
| 38 | + %cond = icmp ne i32 %x, 0 |
| 39 | + br i1 %cond, label %if.then, label %if.else |
| 40 | + |
| 41 | +if.then: |
| 42 | + %nonzero = mul nuw i32 %x, 3 |
| 43 | + %max = call i32 @llvm.umax.i32(i32 %nonzero, i32 1) |
| 44 | + ret i32 %max |
| 45 | + |
| 46 | +if.else: |
| 47 | + ret i32 0 |
| 48 | +} |
| 49 | + |
| 50 | +define i32 @known_non_zero_commute(i32 %x, i32 %y) { |
| 51 | +; CHECK-LABEL: define i32 @known_non_zero_commute( |
| 52 | +; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) { |
| 53 | +; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[X]], 0 |
| 54 | +; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]] |
| 55 | +; CHECK: [[IF_THEN]]: |
| 56 | +; CHECK-NEXT: [[VAL:%.*]] = or i32 [[X]], [[Y]] |
| 57 | +; CHECK-NEXT: ret i32 [[VAL]] |
| 58 | +; CHECK: [[IF_ELSE]]: |
| 59 | +; CHECK-NEXT: ret i32 0 |
| 60 | +; |
| 61 | + %cond = icmp ne i32 %x, 0 |
| 62 | + br i1 %cond, label %if.then, label %if.else |
| 63 | + |
| 64 | +if.then: |
| 65 | + %val = or i32 %x, %y |
| 66 | + %max = call i32 @llvm.umax.i32(i32 1, i32 %val) |
| 67 | + ret i32 %max |
| 68 | + |
| 69 | +if.else: |
| 70 | + ret i32 0 |
| 71 | +} |
| 72 | + |
| 73 | +; Negative |
| 74 | +define i32 @umax_ge_2(i32 %x, i32 %y) { |
| 75 | +; CHECK-LABEL: define i32 @umax_ge_2( |
| 76 | +; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) { |
| 77 | +; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[X]], 0 |
| 78 | +; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]] |
| 79 | +; CHECK: [[IF_THEN]]: |
| 80 | +; CHECK-NEXT: [[VAL:%.*]] = or i32 [[X]], [[Y]] |
| 81 | +; CHECK-NEXT: [[MAX:%.*]] = call i32 @llvm.umax.i32(i32 [[VAL]], i32 2) |
| 82 | +; CHECK-NEXT: ret i32 [[MAX]] |
| 83 | +; CHECK: [[IF_ELSE]]: |
| 84 | +; CHECK-NEXT: ret i32 0 |
| 85 | +; |
| 86 | + %cond = icmp ne i32 %x, 0 |
| 87 | + br i1 %cond, label %if.then, label %if.else |
| 88 | + |
| 89 | +if.then: |
| 90 | + %val = or i32 %x, %y |
| 91 | + %max = call i32 @llvm.umax.i32(i32 %val, i32 2) |
| 92 | + ret i32 %max |
| 93 | + |
| 94 | +if.else: |
| 95 | + ret i32 0 |
| 96 | +} |
| 97 | + |
| 98 | +define i32 @unknown_by_and(i32 %x, i32 %y) { |
| 99 | +; CHECK-LABEL: define i32 @unknown_by_and( |
| 100 | +; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) { |
| 101 | +; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[X]], 0 |
| 102 | +; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]] |
| 103 | +; CHECK: [[IF_THEN]]: |
| 104 | +; CHECK-NEXT: [[VAL:%.*]] = and i32 [[X]], [[Y]] |
| 105 | +; CHECK-NEXT: [[MAX:%.*]] = call i32 @llvm.umax.i32(i32 [[VAL]], i32 1) |
| 106 | +; CHECK-NEXT: ret i32 [[MAX]] |
| 107 | +; CHECK: [[IF_ELSE]]: |
| 108 | +; CHECK-NEXT: ret i32 0 |
| 109 | +; |
| 110 | + %cond = icmp ne i32 %x, 0 |
| 111 | + br i1 %cond, label %if.then, label %if.else |
| 112 | + |
| 113 | +if.then: |
| 114 | + %val = and i32 %x, %y |
| 115 | + %max = call i32 @llvm.umax.i32(i32 %val, i32 1) |
| 116 | + ret i32 %max |
| 117 | + |
| 118 | +if.else: |
| 119 | + ret i32 0 |
| 120 | +} |
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