| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt -constraint-elimination -S %s | FileCheck %s |
| |
| define i1 @wrapping_add_unknown_1(i8 %a) { |
| ; CHECK-LABEL: @wrapping_add_unknown_1( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[SUB:%.*]] = add i8 [[A:%.*]], -1 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 [[SUB]], 0 |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; |
| entry: |
| %sub = add i8 %a, -1 |
| %cmp = icmp eq i8 %sub, 0 |
| ret i1 %cmp |
| } |
| |
| define i1 @wrapping_add_known_1(i8 %a) { |
| ; CHECK-LABEL: @wrapping_add_known_1( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[PRE:%.*]] = icmp eq i8 [[A:%.*]], 1 |
| ; CHECK-NEXT: br i1 [[PRE]], label [[THEN:%.*]], label [[ELSE:%.*]] |
| ; CHECK: then: |
| ; CHECK-NEXT: [[SUB_1:%.*]] = add i8 [[A]], -1 |
| ; CHECK-NEXT: [[C_1:%.*]] = icmp eq i8 [[SUB_1]], 0 |
| ; CHECK-NEXT: ret i1 [[C_1]] |
| ; CHECK: else: |
| ; CHECK-NEXT: [[SUB_2:%.*]] = add i8 [[A]], -1 |
| ; CHECK-NEXT: [[C_2:%.*]] = icmp eq i8 [[SUB_2]], 0 |
| ; CHECK-NEXT: ret i1 [[C_2]] |
| ; |
| entry: |
| %pre = icmp eq i8 %a, 1 |
| br i1 %pre, label %then, label %else |
| |
| then: |
| %sub.1 = add i8 %a, -1 |
| %c.1 = icmp eq i8 %sub.1, 0 |
| ret i1 %c.1 |
| |
| else: |
| %sub.2 = add i8 %a, -1 |
| %c.2 = icmp eq i8 %sub.2, 0 |
| ret i1 %c.2 |
| } |
| |
| define i1 @wrapping_add_unknown_2(i8 %a) { |
| ; CHECK-LABEL: @wrapping_add_unknown_2( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: [[PRE:%.*]] = icmp eq i8 [[A:%.*]], 0 |
| ; CHECK-NEXT: br i1 [[PRE]], label [[THEN:%.*]], label [[ELSE:%.*]] |
| ; CHECK: then: |
| ; CHECK-NEXT: [[SUB_1:%.*]] = add i8 [[A]], -1 |
| ; CHECK-NEXT: [[C_1:%.*]] = icmp eq i8 [[SUB_1]], 0 |
| ; CHECK-NEXT: ret i1 [[C_1]] |
| ; CHECK: else: |
| ; CHECK-NEXT: [[SUB_2:%.*]] = add i8 [[A]], -1 |
| ; CHECK-NEXT: [[C_2:%.*]] = icmp eq i8 [[SUB_2]], 0 |
| ; CHECK-NEXT: ret i1 [[C_2]] |
| ; |
| entry: |
| %pre = icmp eq i8 %a, 0 |
| br i1 %pre, label %then, label %else |
| |
| then: |
| %sub.1 = add i8 %a, -1 |
| %c.1 = icmp eq i8 %sub.1, 0 |
| ret i1 %c.1 |
| |
| else: |
| %sub.2 = add i8 %a, -1 |
| %c.2 = icmp eq i8 %sub.2, 0 |
| ret i1 %c.2 |
| } |