| Justin Lebar | 5b82c9b | 2016-02-22 17:50:52 +0000 | [diff] [blame] | 1 | ; RUN: llc -O2 -tail-dup-size=100 -enable-tail-merge=0 < %s | FileCheck %s |
| 2 | target triple = "nvptx64-nvidia-cuda" |
| 3 | |
| 4 | declare void @foo() |
| Justin Bogner | a463537 | 2016-07-06 20:02:45 +0000 | [diff] [blame] | 5 | declare void @llvm.nvvm.barrier0() |
| Justin Lebar | 5b82c9b | 2016-02-22 17:50:52 +0000 | [diff] [blame] | 6 | |
| 7 | ; syncthreads shouldn't be duplicated. |
| 8 | ; CHECK: .func call_syncthreads |
| 9 | ; CHECK: bar.sync |
| 10 | ; CHECK-NOT: bar.sync |
| 11 | define void @call_syncthreads(i32* %a, i32* %b, i1 %cond, i1 %cond2) nounwind { |
| 12 | br i1 %cond, label %L1, label %L2 |
| 13 | br i1 %cond2, label %Ret, label %L1 |
| 14 | Ret: |
| 15 | ret void |
| 16 | L1: |
| 17 | store i32 0, i32* %a |
| 18 | br label %L42 |
| 19 | L2: |
| 20 | store i32 1, i32* %a |
| 21 | br label %L42 |
| 22 | L42: |
| Justin Bogner | a463537 | 2016-07-06 20:02:45 +0000 | [diff] [blame] | 23 | call void @llvm.nvvm.barrier0() |
| Justin Lebar | 5b82c9b | 2016-02-22 17:50:52 +0000 | [diff] [blame] | 24 | br label %Ret |
| 25 | } |
| 26 | |
| 27 | ; Check that call_syncthreads really does trigger tail duplication. |
| 28 | ; CHECK: .func call_foo |
| 29 | ; CHECK: call |
| 30 | ; CHECK: call |
| 31 | define void @call_foo(i32* %a, i32* %b, i1 %cond, i1 %cond2) nounwind { |
| 32 | br i1 %cond, label %L1, label %L2 |
| 33 | br i1 %cond2, label %Ret, label %L1 |
| 34 | Ret: |
| 35 | ret void |
| 36 | L1: |
| 37 | store i32 0, i32* %a |
| 38 | br label %L42 |
| 39 | L2: |
| 40 | store i32 1, i32* %a |
| 41 | br label %L42 |
| 42 | L42: |
| 43 | call void @foo() |
| 44 | br label %Ret |
| 45 | } |