| ; RUN: llc -march=amdgcn -mcpu=gfx900 -amdgpu-atomic-optimizations=true < %s | FileCheck %s |
| ; RUN: llc -march=amdgcn -mcpu=gfx900 -amdgpu-atomic-optimizations=true < %s -use-gpu-divergence-analysis | FileCheck %s |
| |
| @local = addrspace(3) global i32 undef |
| |
| define amdgpu_kernel void @reducible(i32 %x) { |
| ; CHECK-LABEL: reducible: |
| ; CHECK-NOT: dpp |
| entry: |
| br label %loop |
| loop: |
| %i = phi i32 [ 0, %entry ], [ %i1, %loop ] |
| %gep = getelementptr i32, i32 addrspace(3)* @local, i32 %i |
| %cond = icmp ult i32 %i, %x |
| %i1 = add i32 %i, 1 |
| br i1 %cond, label %loop, label %exit |
| exit: |
| %old = atomicrmw add i32 addrspace(3)* %gep, i32 %x acq_rel |
| ret void |
| } |
