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

// REQUIRES: CPU=x86_64

sil_stage canonical

import Builtin

// This type has equal stride and size.
struct SameSizeStride { var x, y: Builtin.Int32 }

// This type has unequal stride and size.
struct DifferentSizeStride { var x: Builtin.Int32, y: Builtin.Int16 }

// CHECK: define{{( protected)?}} {{.*}}void @same_size_stride(%T8indexing14SameSizeStrideV* noalias nocapture dereferenceable({{.*}}) %0, i64 %1) {{.*}} {
// CHECK:   getelementptr inbounds %T8indexing14SameSizeStrideV, %T8indexing14SameSizeStrideV* %0, i64 %1
sil @same_size_stride : $@convention(thin) (@in SameSizeStride, Builtin.Word) -> () {
entry(%p : $*SameSizeStride, %i: $Builtin.Word):
  %q = index_addr %p : $*SameSizeStride, %i : $Builtin.Word
  return undef : $()
}

// CHECK:      define{{( protected)?}} {{.*}}void @different_size_stride(%T8indexing19DifferentSizeStrideV* noalias nocapture dereferenceable({{.*}}) %0, i64 %1) {{.*}} {
// CHECK:        %2 = bitcast %T8indexing19DifferentSizeStrideV* %0 to i8*
// CHECK-NEXT:   %3 = mul nsw i64 %1, 8
// CHECK-NEXT:   %4 = getelementptr inbounds i8, i8* %2, i64 %3
// CHECK-NEXT:   %5 = bitcast i8* %4 to %T8indexing19DifferentSizeStrideV*
sil @different_size_stride : $@convention(thin) (@in DifferentSizeStride, Builtin.Word) -> () {
entry(%p : $*DifferentSizeStride, %i: $Builtin.Word):
  %q = index_addr %p : $*DifferentSizeStride, %i : $Builtin.Word
  return undef : $()
}

// CHECK:      define{{( protected)?}} {{.*}}void @zero_size(%swift.opaque* noalias nocapture %0, i64 %1) {{.*}} {
// CHECK:        %2 = bitcast %swift.opaque* %0 to i8*
// CHECK-NEXT:   %3 = mul nsw i64 %1, 1
// CHECK-NEXT:   %4 = getelementptr inbounds i8, i8* %2, i64 %3
sil @zero_size : $@convention(thin) (@in (), Builtin.Word) -> () {
entry(%p : $*(), %i: $Builtin.Word):
  %q = index_addr %p : $*(), %i : $Builtin.Word
  return undef : $()
}

// CHECK:      define{{( protected)?}} {{.*}}void @dynamic_size(%swift.opaque* noalias nocapture %0, i64 %1, %swift.type* %T) {{.*}} {
// CHECK:        [[T0:%.*]] = bitcast %swift.type* %T to i8***
// CHECK-NEXT:   [[T1:%.*]] = getelementptr inbounds i8**, i8*** [[T0]], i64 -1
// CHECK-NEXT:   [[VWT:%T.valueWitnesses]] = load i8**, i8*** [[T1]], align 8
// CHECK:        [[VWT_CAST:%.*]] = bitcast i8** [[VWT]] to %swift.vwtable*
// CHECK:        [[STRIDE_ADDR:%.*]] = getelementptr inbounds %swift.vwtable, %swift.vwtable* [[VWT_CAST]], i32 0, i32 9
// CHECK:        [[STRIDE:%.*]] = load i64, i64* [[STRIDE_ADDR]]
// CHECK-NEXT:   [[T0:%.*]] = mul nsw i64 %1, [[STRIDE]]
// CHECK-NEXT:   getelementptr inbounds i8, i8* %2, i64 [[T0]]

sil @dynamic_size : $@convention(thin) <T> (@in T, Builtin.Word) -> () {
entry(%p : $*T, %i: $Builtin.Word):
  %q = index_addr %p : $*T, %i : $Builtin.Word
  return undef : $()
}