| Justin Lebar | b326904 | 2018-06-14 17:13:35 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s |
| 2 | |
| 3 | ; Check that we convert |
| 4 | ; trunc(C * a) -> trunc(C) * trunc(a) |
| 5 | ; if C is a constant. |
| 6 | ; CHECK-LABEL: @trunc_of_mul |
| 7 | define i8 @trunc_of_mul(i32 %a) { |
| 8 | %b = mul i32 %a, 100 |
| 9 | ; CHECK: %c |
| 10 | ; CHECK-NEXT: --> (100 * (trunc i32 %a to i8)) |
| 11 | %c = trunc i32 %b to i8 |
| 12 | ret i8 %c |
| 13 | } |
| 14 | |
| 15 | ; Check that we convert |
| 16 | ; trunc(C + a) -> trunc(C) + trunc(a) |
| 17 | ; if C is a constant. |
| 18 | ; CHECK-LABEL: @trunc_of_add |
| 19 | define i8 @trunc_of_add(i32 %a) { |
| 20 | %b = add i32 %a, 100 |
| 21 | ; CHECK: %c |
| 22 | ; CHECK-NEXT: --> (100 + (trunc i32 %a to i8)) |
| 23 | %c = trunc i32 %b to i8 |
| 24 | ret i8 %c |
| 25 | } |