| Brendon Cahoon | 9376e99 | 2015-05-14 14:15:08 +0000 | [diff] [blame] | 1 | ; RUN: llc -march=hexagon -mcpu=hexagonv5 < %s | FileCheck %s |
| 2 | |
| 3 | ; We shouldn't generate a hardware loop in this case because the initial |
| 4 | ; value may be zero, which means the endloop instruction will not decrement |
| 5 | ; the loop counter, and the loop will execute only once. |
| 6 | |
| 7 | ; CHECK-NOT: loop0 |
| 8 | |
| 9 | define void @foo(i32 %count, i32 %v) #0 { |
| 10 | entry: |
| 11 | br label %do.body |
| 12 | |
| 13 | do.body: |
| 14 | %count.addr.0 = phi i32 [ %count, %entry ], [ %dec, %do.body ] |
| 15 | tail call void asm sideeffect "nop", ""() #1 |
| 16 | %dec = add i32 %count.addr.0, -1 |
| 17 | %cmp = icmp eq i32 %dec, 0 |
| 18 | br i1 %cmp, label %do.end, label %do.body |
| 19 | |
| 20 | do.end: |
| 21 | ret void |
| 22 | } |