TheRock/compiler/amd-llvm/clang/test/CIR/Transforms/pure-ptr-arithmetic.cir

// RUN: cir-opt %s -canonicalize -o - | FileCheck %s

// Verify that pointer-arithmetic ops marked Pure are eliminated when their
// results are unused (trivially dead).

!s32i = !cir.int<s, 32>
!u8i = !cir.int<u, 8>
!void = !cir.void

!rec_S = !cir.struct<"S" {!s32i, !s32i}>
!rec_Base = !cir.struct<"Base" {!u8i}>
!rec_Derived = !cir.struct<"Derived" {!rec_Base, !s32i}>

module {

// CHECK-LABEL: @dead_get_member
// CHECK-NOT:     cir.get_member
cir.func @dead_get_member(%arg0: !cir.ptr<!rec_S>) {
  %0 = cir.get_member %arg0[1] {name = "y"} : !cir.ptr<!rec_S> -> !cir.ptr<!s32i>
  cir.return
}

// CHECK-LABEL: @dead_base_class_addr
// CHECK-NOT:     cir.base_class_addr
cir.func @dead_base_class_addr(%arg0: !cir.ptr<!rec_Derived>) {
  %0 = cir.base_class_addr %arg0 : !cir.ptr<!rec_Derived> nonnull [0] -> !cir.ptr<!rec_Base>
  cir.return
}

// CHECK-LABEL: @dead_derived_class_addr
// CHECK-NOT:     cir.derived_class_addr
cir.func @dead_derived_class_addr(%arg0: !cir.ptr<!rec_Base>) {
  %0 = cir.derived_class_addr %arg0 : !cir.ptr<!rec_Base> nonnull [0] -> !cir.ptr<!rec_Derived>
  cir.return
}

// CHECK-LABEL: @dead_vtable_get_vptr
// CHECK-NOT:     cir.vtable.get_vptr
cir.func @dead_vtable_get_vptr(%arg0: !cir.ptr<!rec_Derived>) {
  %0 = cir.vtable.get_vptr %arg0 : !cir.ptr<!rec_Derived> -> !cir.ptr<!cir.vptr>
  cir.return
}

// CHECK-LABEL: @dead_vtable_get_virtual_fn_addr
// CHECK-NOT:     cir.vtable.get_virtual_fn_addr
cir.func @dead_vtable_get_virtual_fn_addr(%arg0: !cir.vptr) {
  %0 = cir.vtable.get_virtual_fn_addr %arg0[0] : !cir.vptr -> !cir.ptr<!cir.ptr<!cir.func<(!cir.ptr<!rec_Base>)>>>
  cir.return
}

// CHECK-LABEL: @dead_vtable_get_type_info
// CHECK-NOT:     cir.vtable.get_type_info
cir.func @dead_vtable_get_type_info(%arg0: !cir.vptr) {
  %0 = cir.vtable.get_type_info %arg0 : !cir.vptr -> !cir.ptr<!cir.ptr<!rec_S>>
  cir.return
}

// CHECK-LABEL: @dead_get_runtime_member
// CHECK-NOT:     cir.get_runtime_member
cir.func @dead_get_runtime_member(%arg0: !cir.ptr<!rec_S>, %arg1: !cir.data_member<!s32i in !rec_S>) {
  %0 = cir.get_runtime_member %arg0[%arg1 : !cir.data_member<!s32i in !rec_S>] : !cir.ptr<!rec_S> -> !cir.ptr<!s32i>
  cir.return
}

}