llvm-6502/test/CodeGen/R600/array-ptr-calc-i32.ll

; RUN: llc -verify-machineinstrs -march=r600 -mcpu=SI < %s | FileCheck -check-prefix=SI %s

declare i32 @llvm.SI.tid() nounwind readnone
declare void @llvm.AMDGPU.barrier.local() nounwind noduplicate

; The required pointer calculations for the alloca'd actually requires
; an add and won't be folded into the addressing, which fails with a
; 64-bit pointer add. This should work since private pointers should
; be 32-bits.

; SI-LABEL: @test_private_array_ptr_calc:
; SI: V_ADD_I32_e32 [[PTRREG:v[0-9]+]]
;
; FIXME: The AMDGPUPromoteAlloca pass should be able to convert this
; alloca to a vector.  It currently fails because it does not know how
; to interpret:
; getelementptr [4 x i32]* %alloca, i32 1, i32 %b
; SI: DS_WRITE_B32 {{v[0-9]+}}, [[PTRREG]]
define void @test_private_array_ptr_calc(i32 addrspace(1)* noalias %out, i32 addrspace(1)* noalias %inA, i32 addrspace(1)* noalias %inB) {
  %alloca = alloca [4 x i32], i32 4, align 16
  %tid = call i32 @llvm.SI.tid() readnone
  %a_ptr = getelementptr i32 addrspace(1)* %inA, i32 %tid
  %b_ptr = getelementptr i32 addrspace(1)* %inB, i32 %tid
  %a = load i32 addrspace(1)* %a_ptr
  %b = load i32 addrspace(1)* %b_ptr
  %result = add i32 %a, %b
  %alloca_ptr = getelementptr [4 x i32]* %alloca, i32 1, i32 %b
  store i32 %result, i32* %alloca_ptr, align 4
  ; Dummy call
  call void @llvm.AMDGPU.barrier.local() nounwind noduplicate
  %reload = load i32* %alloca_ptr, align 4
  %out_ptr = getelementptr i32 addrspace(1)* %out, i32 %tid
  store i32 %reload, i32 addrspace(1)* %out_ptr, align 4
  ret void
}