| Richard Sandiford | 791bea4 | 2013-07-31 12:58:26 +0000 | [diff] [blame^] | 1 | ; Test loop tuning. |
| 2 | ; |
| 3 | ; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s |
| 4 | |
| 5 | ; Test that strength reduction is applied to addresses with a scale factor, |
| 6 | ; but that indexed addressing can still be used. |
| 7 | define void @f1(i32 *%dest, i32 %a) { |
| 8 | ; CHECK-LABEL: f1 |
| 9 | ; CHECK-NOT: sllg |
| 10 | ; CHECK: st %r3, 0({{%r[1-5],%r[1-5]}}) |
| 11 | ; CHECK: br %r14 |
| 12 | entry: |
| 13 | br label %loop |
| 14 | |
| 15 | loop: |
| 16 | %index = phi i64 [ 0, %entry ], [ %next, %loop ] |
| 17 | %ptr = getelementptr i32 *%dest, i64 %index |
| 18 | store i32 %a, i32 *%ptr |
| 19 | %next = add i64 %index, 1 |
| 20 | %cmp = icmp ne i64 %next, 100 |
| 21 | br i1 %cmp, label %loop, label %exit |
| 22 | |
| 23 | exit: |
| 24 | ret void |
| 25 | } |