// RUN: %target-swift-frontend -emit-ir %s -verify | %FileCheck %s
// RUN: %target-swift-frontend -emit-ir -O %s -verify | %FileCheck %s --check-prefix=OPT

// REQUIRES: CPU=i386 || CPU=x86_64

sil_stage canonical

import Swift

// CHECK-LABEL: define{{( dllexport)?}}{{( protected)?}} swiftcc i64 @bitcast_different_size1

// OPT-LABEL: define{{.*}}@bitcast_different_size1(i32)
// OPT:   tail call void asm sideeffect "", "n"(i32 0)
// OPT-NEXT:   tail call void @llvm.trap()
// OPT-NEXT:   unreachable

sil @bitcast_different_size1 : $@convention(thin) (Int32) -> Int64 {
entry(%i : $Int32):
  // CHECK: ret {{.*}}undef
  // CHECK: call {{.*}}trap
  %o = unchecked_trivial_bit_cast %i : $Int32 to $Int64
  return %o : $Int64
}