Fix a thinko

Author: gottesmm

include/swift/SIL/SILInstruction.h

@@ -1811,7 +1811,7 @@ struct SILDebugVariable {
   bool operator==(const SILDebugVariable &V) {
     return ArgNo == V.ArgNo && Constant == V.Constant && Name == V.Name &&
            Implicit == V.Implicit && Type == V.Type && Loc == V.Loc &&
-           Scope == V.Scope && DIExpr == DIExpr;
+           Scope == V.Scope && DIExpr == V.DIExpr;
   }
 
   bool isLet() const { return Name.size() && Constant; }

test/SILOptimizer/specialize_unconditional_checked_cast.swift

@@ -97,9 +97,13 @@ ArchetypeToConcreteConvertUInt8(t: c)
 ArchetypeToConcreteConvertUInt8(t: f)
 
 // x -> x where x is not a class.
+//
+// TODO: Why is the optimizer cloning twice here.
+//
 // CHECK-LABEL: sil shared [noinline] @$s37specialize_unconditional_checked_cast31ArchetypeToConcreteConvertUInt8{{[_0-9a-zA-Z]*}}3Not{{.*}}Tg5 : $@convention(thin) (NotUInt8) -> NotUInt8 {
 // CHECK: bb0
 // CHECK-NEXT: debug_value %0
+// CHECK-NEXT: debug_value %0
 // CHECK-NEXT: return %0
 
 // x -> y where y is a class but x is not.
@@ -120,6 +124,7 @@ ArchetypeToConcreteConvertUInt8(t: f)
 // CHECK-LABEL: sil shared [noinline] @$s37specialize_unconditional_checked_cast27ArchetypeToConcreteConvertC{{[_0-9a-zA-Z]*}}Tg5 : $@convention(thin) (@guaranteed C) -> @owned C {
 // CHECK: bb0([[ARG:%.*]] : $C)
 // CHECK-NEXT: debug_value [[ARG]]
+// CHECK-NEXT: debug_value [[ARG]]
 // CHECK-NEXT: strong_retain [[ARG]]
 // CHECK-NEXT: return [[ARG]]