| Sanjay Patel | baac743 | 2017-01-09 19:31:20 +0000 | [diff] [blame] | 1 | ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| Jingyue Wu | 12b0c28 | 2015-06-15 05:46:29 +0000 | [diff] [blame] | 2 | ; RUN: opt < %s -instcombine -S | FileCheck %s |
| 3 | |
| 4 | define i32 @assume_add(i32 %a, i32 %b) { |
| 5 | ; CHECK-LABEL: @assume_add( |
| Sanjay Patel | baac743 | 2017-01-09 19:31:20 +0000 | [diff] [blame] | 6 | ; CHECK-NEXT: [[T1:%.*]] = add i32 [[A:%.*]], [[B:%.*]] |
| 7 | ; CHECK-NEXT: [[LAST_TWO_DIGITS:%.*]] = and i32 [[T1]], 3 |
| 8 | ; CHECK-NEXT: [[T2:%.*]] = icmp eq i32 [[LAST_TWO_DIGITS]], 0 |
| 9 | ; CHECK-NEXT: call void @llvm.assume(i1 [[T2]]) |
| 10 | ; CHECK-NEXT: [[T3:%.*]] = or i32 [[T1]], 3 |
| 11 | ; CHECK-NEXT: ret i32 [[T3]] |
| 12 | ; |
| 13 | %t1 = add i32 %a, %b |
| 14 | %last_two_digits = and i32 %t1, 3 |
| 15 | %t2 = icmp eq i32 %last_two_digits, 0 |
| 16 | call void @llvm.assume(i1 %t2) |
| 17 | %t3 = add i32 %t1, 3 |
| 18 | ret i32 %t3 |
| Jingyue Wu | 12b0c28 | 2015-06-15 05:46:29 +0000 | [diff] [blame] | 19 | } |
| 20 | |
| Sanjay Patel | baac743 | 2017-01-09 19:31:20 +0000 | [diff] [blame] | 21 | |
| Hal Finkel | b03dd4b | 2017-08-14 17:11:43 +0000 | [diff] [blame] | 22 | define void @assume_not() { |
| 23 | ; CHECK-LABEL: @assume_not( |
| 24 | entry-block: |
| 25 | %0 = call i1 @get_val() |
| 26 | ; CHECK: call void @llvm.assume |
| 27 | %1 = xor i1 %0, true |
| 28 | call void @llvm.assume(i1 %1) |
| 29 | ret void |
| 30 | } |
| 31 | |
| 32 | declare i1 @get_val() |
| 33 | declare void @llvm.assume(i1) |