llvm/test/Transforms/InferAddressSpaces/AMDGPU/multiple-uses-of-val.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -mtriple=amdgcn-amd-amdhsa -mcpu=gfx90a -S -passes=infer-address-spaces --verify-each %s | FileCheck %s

; Inst can use a value multiple time. When we're inserting an addrspacecast to flat,
; it's important all the identical uses use an indentical replacement, especially
; for PHIs.

define amdgpu_kernel void @test_phi() {
; CHECK-LABEL: @test_phi(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[LOADED_PTR:%.*]] = load ptr, ptr addrspace(4) null, align 8
; CHECK-NEXT:    [[TMP0:%.*]] = addrspacecast ptr [[LOADED_PTR]] to ptr addrspace(1)
; CHECK-NEXT:    br label [[BB0:%.*]]
; CHECK:       bb0:
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i64, ptr addrspace(1) [[TMP0]], i64 3
; CHECK-NEXT:    [[TMP1:%.*]] = addrspacecast ptr addrspace(1) [[GEP]] to ptr
; CHECK-NEXT:    switch i32 0, label [[END:%.*]] [
; CHECK-NEXT:      i32 1, label [[END]]
; CHECK-NEXT:      i32 4, label [[END]]
; CHECK-NEXT:      i32 5, label [[BB1:%.*]]
; CHECK-NEXT:    ]
; CHECK:       bb1:
; CHECK-NEXT:    [[TMP2:%.*]] = load double, ptr addrspace(1) [[GEP]], align 16
; CHECK-NEXT:    br label [[END]]
; CHECK:       end:
; CHECK-NEXT:    [[RETVAL_SROA_0_0_I569_PH:%.*]] = phi ptr [ null, [[BB1]] ], [ [[TMP1]], [[BB0]] ], [ [[TMP1]], [[BB0]] ], [ [[TMP1]], [[BB0]] ]
; CHECK-NEXT:    ret void
;
entry:
  %loaded.ptr = load ptr, ptr addrspace(4) null, align 8
  br label %bb0

bb0:
  %gep = getelementptr i64, ptr %loaded.ptr, i64 3
  switch i32 0, label %end [
  i32 1, label %end
  i32 4, label %end
  i32 5, label %bb1
  ]

bb1:
  %0 = load double, ptr %gep, align 16
  br label %end

end:
  %retval.sroa.0.0.i569.ph = phi ptr [ null, %bb1 ], [ %gep, %bb0 ], [ %gep, %bb0 ], [ %gep, %bb0 ]
  ret void
}

declare void @uses_ptrs(ptr, ptr, ptr)

; We shouldn't treat PHIs differently, even other users should have the same treatment.
; All occurences of %gep are replaced with an identical value.
define amdgpu_kernel void @test_other() {
; CHECK-LABEL: @test_other(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[LOADED_PTR:%.*]] = load ptr, ptr addrspace(4) null, align 8
; CHECK-NEXT:    [[TMP0:%.*]] = addrspacecast ptr [[LOADED_PTR]] to ptr addrspace(1)
; CHECK-NEXT:    [[TMP1:%.*]] = addrspacecast ptr addrspace(1) [[TMP0]] to ptr
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr i64, ptr [[TMP1]], i64 3
; CHECK-NEXT:    call void @uses_ptrs(ptr [[GEP]], ptr [[GEP]], ptr [[GEP]])
; CHECK-NEXT:    ret void
;
entry:
  %loaded.ptr = load ptr, ptr addrspace(4) null, align 8
  %gep = getelementptr i64, ptr %loaded.ptr, i64 3
  call void @uses_ptrs(ptr %gep, ptr %gep, ptr %gep)
  ret void
}