test/IRGen/witness_method_phi.sil

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

sil_stage canonical

protocol P { func foo() }
// CHECK-LABEL: define{{( dllexport)?}}{{( protected)?}} swiftcc void @phi_witness_method(%swift.type* %T, i8** %T.P) #0 {
sil @phi_witness_method : $@convention(thin) <T: P> () -> () {
entry:
  // CHECK: [[T0_GEP:%.*]] = getelementptr inbounds i8*, i8** %T.P, i32 1
  // CHECK: [[LOAD:%.*]] = load i8*, i8** [[T0_GEP]],
  // CHECK: [[T0:%.*]] = bitcast i8* [[LOAD]] to void (%swift.opaque*, %swift.type*, i8**)*
  // CHECK: [[FUNC:%.*]] = bitcast void (%swift.opaque*, %swift.type*, i8**)* [[T0]] to i8*
  %1 = witness_method $T, #P.foo!1 : $@convention(witness_method: P) <T: P> (@in T) -> ()
  br bb1(%1 : $@convention(witness_method: P) <T: P> (@in T) -> ())

// CHECK:         phi i8* [ [[FUNC]], %entry ]
bb1(%2 : $@convention(witness_method: P) <T: P> (@in T) -> ()):
  unreachable
}