| Juergen Ributzka | 77bc09f | 2014-08-29 00:19:21 +0000 | [diff] [blame^] | 1 | ; RUN: llc -mtriple=aarch64-apple-darwin -O0 -fast-isel-abort -verify-machineinstrs < %s |
| 2 | |
| 3 | ; Test that we don't fold the shift. |
| 4 | define i64 @fold_shift_test(i64 %a, i1 %c) { |
| 5 | %1 = sub i64 %a, 8 |
| 6 | %2 = ashr i64 %1, 3 |
| 7 | br i1 %c, label %bb1, label %bb2 |
| 8 | bb1: |
| 9 | %3 = icmp ult i64 0, %2 |
| 10 | br i1 %3, label %bb2, label %bb3 |
| 11 | bb2: |
| 12 | ret i64 1 |
| 13 | bb3: |
| 14 | ret i64 2 |
| 15 | } |
| 16 | |
| 17 | ; Test that we don't fold the sign-extend. |
| 18 | define i64 @fold_sext_test1(i32 %a, i1 %c) { |
| 19 | %1 = sub i32 %a, 8 |
| 20 | %2 = sext i32 %1 to i64 |
| 21 | br i1 %c, label %bb1, label %bb2 |
| 22 | bb1: |
| 23 | %3 = icmp ult i64 0, %2 |
| 24 | br i1 %3, label %bb2, label %bb3 |
| 25 | bb2: |
| 26 | ret i64 1 |
| 27 | bb3: |
| 28 | ret i64 2 |
| 29 | } |
| 30 | |
| 31 | ; Test that we don't fold the sign-extend. |
| 32 | define i64 @fold_sext_test2(i32 %a, i1 %c) { |
| 33 | %1 = sub i32 %a, 8 |
| 34 | %2 = sext i32 %1 to i64 |
| 35 | br i1 %c, label %bb1, label %bb2 |
| 36 | bb1: |
| 37 | %3 = shl i64 %2, 4 |
| 38 | ret i64 %3 |
| 39 | bb2: |
| 40 | ret i64 %2 |
| 41 | } |
| 42 | |
| 43 | ; Test that we clear the kill flag. |
| 44 | define i32 @fold_kill_test(i32 %a) { |
| 45 | %1 = sub i32 %a, 8 |
| 46 | %2 = shl i32 %1, 3 |
| 47 | %3 = icmp ult i32 0, %2 |
| 48 | br i1 %3, label %bb1, label %bb2 |
| 49 | bb1: |
| 50 | ret i32 %2 |
| 51 | bb2: |
| 52 | %4 = add i32 %2, 4 |
| 53 | ret i32 %4 |
| 54 | } |