test/IRGen/fixed_size_buffer_peepholes.sil

// RUN: %target-swift-frontend -emit-ir %s | FileCheck %s

import Builtin

sil @consume : $@convention(thin) <T> (@in T) -> ()
sil @produce : $@convention(thin) <T> () -> @out T

// CHECK-LABEL: define{{( protected)?}} void @join_alloc_stack_copy_addr
sil @join_alloc_stack_copy_addr : $@convention(thin) <T> (@in T) -> () {
entry(%x : $*T):
  // CHECK: [[BUFFER:%.*]] = alloca [[BUFFER_TYPE:\[.* x i8\]]]
  // CHECK: [[BUFFERLIFE:%.*]] = bitcast [[BUFFER_TYPE]]* [[BUFFER]]
  // CHECK: llvm.lifetime.start(i64 [[BUFFER_SIZE:12|24]], i8* [[BUFFERLIFE]])
  %a = alloc_stack $T
  // CHECK: [[ADDR:%.*]] = call %swift.opaque* %initializeBufferWithCopy([[BUFFER_TYPE]]* [[BUFFER]], %swift.opaque* %0, %swift.type* %T)
  copy_addr %x to [initialization] %a : $*T
  // CHECK: call void @consume(%swift.opaque* noalias nocapture [[ADDR]], %swift.type* %T)
  %u = function_ref @consume : $@convention(thin) <T> (@in T) -> ()
  %z = apply %u<T>(%a) : $@convention(thin) <T> (@in T) -> ()
  // CHECK: [[BUFFERLIFE:%.*]] = bitcast [[BUFFER_TYPE]]* [[BUFFER]]
  // CHECK: llvm.lifetime.end(i64 [[BUFFER_SIZE]], i8* [[BUFFERLIFE]])
  dealloc_stack %a : $*T
  return undef : $()
}

protocol P {}

// CHECK-LABEL: define{{( protected)?}} void @join_init_existential_copy_addr(%P27fixed_size_buffer_peepholes1P_* noalias nocapture sret, %swift.opaque* noalias nocapture, %swift.type* %T, i8** %T.P)
// CHECK:         [[BUFFER:%.*]] = getelementptr inbounds %P27fixed_size_buffer_peepholes1P_, %P27fixed_size_buffer_peepholes1P_* %0, i32 0, i32 0
// CHECK:         call %swift.opaque* %initializeBufferWithTake([[BUFFER_TYPE]]* [[BUFFER]], %swift.opaque* %1
sil @join_init_existential_copy_addr : $@convention(thin) <T: P> (@in T) -> @out P {
entry(%p : $*P, %x: $*T):
  %y = init_existential_addr %p : $*P, $T
  copy_addr [take] %x to [initialization] %y : $*T
  return undef : $()
}

// CHECK-LABEL: define{{( protected)?}} void @dont_join_alloc_stack_copy_addr_if_intervening_use
sil @dont_join_alloc_stack_copy_addr_if_intervening_use : $@convention(thin) <T> (@in T) -> () {
entry(%x : $*T):
  // CHECK: [[BUFFER:%.*]] = alloca [[BUFFER_TYPE:\[.* x i8\]]]
  // CHECK: [[ADDR:%.*]] = call %swift.opaque* %allocateBuffer([[BUFFER_TYPE]]* [[BUFFER]], %swift.type* %T)
  %a = alloc_stack $T
  %p = function_ref @produce : $@convention(thin) <T> () -> @out T
  %y = apply %p<T>(%a) : $@convention(thin) <T> () -> @out T
  destroy_addr %a : $*T

  // CHECK: call %swift.opaque* %initializeWithCopy(%swift.opaque* [[ADDR]],
  copy_addr %x to [initialization] %a : $*T
  %u = function_ref @consume : $@convention(thin) <T> (@in T) -> ()
  %z = apply %u<T>(%a) : $@convention(thin) <T> (@in T) -> ()
  dealloc_stack %a : $*T
  return undef : $()
}

// CHECK-LABEL: define{{( protected)?}} void @dont_join_alloc_stack_copy_addr_if_no_copy_addr
sil @dont_join_alloc_stack_copy_addr_if_no_copy_addr : $@convention(thin) <T> (@in T) -> () {
entry(%x : $*T):
  // CHECK: [[BUFFER:%.*]] = alloca [[BUFFER_TYPE:\[.* x i8\]]]
  // CHECK: [[ADDR:%.*]] = call %swift.opaque* %allocateBuffer([[BUFFER_TYPE]]* [[BUFFER]], %swift.type* %T)
  %a = alloc_stack $T
  %p = function_ref @produce : $@convention(thin) <T> () -> @out T
  %y = apply %p<T>(%a) : $@convention(thin) <T> () -> @out T
  destroy_addr %a : $*T
  dealloc_stack %a : $*T
  return undef : $()
}

// CHECK-LABEL: define{{( protected)?}} void @dont_join_alloc_stack_if_copy_addr_in_different_bb
sil @dont_join_alloc_stack_if_copy_addr_in_different_bb : $@convention(thin) <T> (@in T) -> () {
entry(%x : $*T):
  // CHECK: [[BUFFER:%.*]] = alloca [[BUFFER_TYPE:\[.* x i8\]]]
  // CHECK: [[ADDR:%.*]] = call %swift.opaque* %allocateBuffer([[BUFFER_TYPE]]* [[BUFFER]], %swift.type* %T)
  %a = alloc_stack $T
  br next

next:
  // CHECK: call %swift.opaque* %initializeWithCopy(%swift.opaque* [[ADDR]],
  copy_addr %x to [initialization] %a : $*T
  // CHECK: call void @consume(%swift.opaque* noalias nocapture [[ADDR]], %swift.type* %T)
  %u = function_ref @consume : $@convention(thin) <T> (@in T) -> ()
  %z = apply %u<T>(%a) : $@convention(thin) <T> (@in T) -> ()
  dealloc_stack %a : $*T
  return undef : $()
}