[PATCH] D103225: [AMDGPU] Replace non-kernel function uses of LDS globals by pointers.

[Jay Foad via Phabricator via llvm-commits]

foad added a comment.

Here's a .ll testcase reduced from the openmp helloworld thing:

  ; ModuleID = 'z.ll'
  source_filename = "llvm-link"
  target datalayout = "e-p:64:64-p1:64:64-p2:32:32-p3:32:32-p4:64:64-p5:32:32-p6:32:32-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64-S32-A5-G1-ni:7"
  target triple = "amdgcn-amd-amdhsa"
  
  @usedSlotIdx = internal local_unnamed_addr addrspace(3) global i32 undef, align 4
  
  define weak amdgpu_kernel void @__omp_offloading_10302_1a22e53_main_l7() {
  entry:
    %nvptx_num_threads = call i32 @__kmpc_amdgcn_gpu_num_threads()
    ret void
  }
  
  ; Function Attrs: nounwind readnone speculatable willreturn
  declare i32 @llvm.amdgcn.workitem.id.x() #0
  
  declare i32 @__kmpc_amdgcn_gpu_num_threads()
  
  define internal void @__kmpc_kernel_init() {
  entry:
    store i32 undef, i32 addrspace(3)* @usedSlotIdx, align 4, !tbaa !0
    ret void
  }
  
  ; Function Attrs: argmemonly nofree nosync nounwind willreturn
  declare void @llvm.lifetime.start.p5i8(i64 immarg, i8 addrspace(5)* nocapture) #1
  
  ; Function Attrs: argmemonly nofree nosync nounwind willreturn
  declare void @llvm.lifetime.end.p5i8(i64 immarg, i8 addrspace(5)* nocapture) #1
  
  attributes #0 = { nounwind readnone speculatable willreturn }
  attributes #1 = { argmemonly nofree nosync nounwind willreturn }
  
  !0 = !{!1, !1, i64 0}
  !1 = !{!"int", !2, i64 0}
  !2 = !{!"omnipotent char", !3, i64 0}
  !3 = !{!"Simple C++ TBAA"}

Compile with: `llc -march=amdgcn -mcpu=gfx906 -o /dev/null z.ll`

It bisects to this patch D103225 <https://reviews.llvm.org/D103225>, not D104704 <https://reviews.llvm.org/D104704>.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D103225/new/

https://reviews.llvm.org/D103225