[HLSL] get inout/out ABI for array parameters working

clang/include/clang/AST/ASTContext.h

@@ -1471,6 +1471,10 @@ class ASTContext : public RefCountedBase<ASTContext> {
   /// type to the decayed type.
   QualType getDecayedType(QualType Orig, QualType Decayed) const;
 
+  /// Return the uniqued reference to a constant array type from the
+  /// original array parameter type.
+  QualType getConstantArrayFromArrayParameterType(QualType Ty) const;
+
   /// Return the uniqued reference to a specified array parameter type from the
   /// original array type.
   QualType getArrayParameterType(QualType Ty) const;

clang/lib/AST/ASTContext.cpp

@@ -3830,6 +3830,16 @@ QualType ASTContext::getDecayedType(QualType T) const {
   return getDecayedType(T, Decayed);
 }
 
+QualType ASTContext::getConstantArrayFromArrayParameterType(QualType Ty) const {
+  if (Ty->isConstantArrayType() && !Ty->isArrayParameterType())
+    return Ty;
+  assert(Ty->isArrayParameterType() && "Ty must be an array parameter type.");
+  const auto *ATy = cast<ArrayParameterType>(Ty);
+  return getConstantArrayType(ATy->getElementType(), ATy->getSize(),
+                              ATy->getSizeExpr(), ATy->getSizeModifier(),
+                              ATy->getIndexTypeQualifiers().getAsOpaqueValue());
+}
+
 QualType ASTContext::getArrayParameterType(QualType Ty) const {
   if (Ty->isArrayParameterType())
     return Ty;

clang/lib/CodeGen/CGCall.cpp

@@ -4690,8 +4690,9 @@ void CodeGenFunction::EmitCallArg(CallArgList &args, const Expr *E,
     return emitWritebackArg(*this, args, CRE);
   }
 
-  assert(type->isReferenceType() == E->isGLValue() &&
-         "reference binding to unmaterialized r-value!");
+  assert(type->isArrayParameterType() ||
+         (type->isReferenceType() == E->isGLValue()) &&
+             "reference binding to unmaterialized r-value!");
 
   // Add writeback for HLSLOutParamExpr.
   if (const HLSLOutArgExpr *OE = dyn_cast<HLSLOutArgExpr>(E)) {

clang/lib/CodeGen/CGExpr.cpp

@@ -5811,9 +5811,12 @@ LValue CodeGenFunction::EmitBinaryOperatorLValue(const BinaryOperator *E) {
 // This function implements trivial copy assignment for HLSL's
 // assignable constant arrays.
 LValue CodeGenFunction::EmitHLSLArrayAssignLValue(const BinaryOperator *E) {
-  LValue TrivialAssignmentRHS = EmitLValue(E->getRHS());
+  // Don't emit an LValue for the RHS because it might not be an LValue
   LValue LHS = EmitLValue(E->getLHS());
-  EmitAggregateAssign(LHS, TrivialAssignmentRHS, E->getLHS()->getType());
+  // In C assignment operator RHS is often an RValue.
+  // EmitAggregateAssign expects an LValue for the RHS so call the below
+  // function instead.
+  EmitInitializationToLValue(E->getRHS(), LHS);
   return LHS;
 }
 

clang/lib/Sema/SemaExprCXX.cpp

@@ -4424,10 +4424,17 @@ Sema::PerformImplicitConversion(Expr *From, QualType ToType,
     break;
 
   case ICK_HLSL_Array_RValue:
-    FromType = Context.getArrayParameterType(FromType);
-    From = ImpCastExprToType(From, FromType, CK_HLSLArrayRValue, VK_PRValue,
-                             /*BasePath=*/nullptr, CCK)
-               .get();
+    if (ToType->isArrayParameterType()) {
+      FromType = Context.getArrayParameterType(FromType);
+      From = ImpCastExprToType(From, FromType, CK_HLSLArrayRValue, VK_PRValue,
+                               /*BasePath=*/nullptr, CCK)
+                 .get();
+    } else { // FromType must be ArrayParameterType
+      FromType = Context.getConstantArrayFromArrayParameterType(FromType);
+      From = ImpCastExprToType(From, FromType, CK_HLSLArrayRValue, VK_PRValue,
+                               /*BasePath=*/nullptr, CCK)
+                 .get();
+    }
     break;
 
   case ICK_Function_To_Pointer:

clang/lib/Sema/SemaOverload.cpp

@@ -2212,33 +2212,19 @@ static bool IsStandardConversion(Sema &S, Expr* From, QualType ToType,
       return false;
     }
   }
-  // Lvalue-to-rvalue conversion (C++11 4.1):
-  //   A glvalue (3.10) of a non-function, non-array type T can
-  //   be converted to a prvalue.
-  bool argIsLValue = From->isGLValue();
-  if (argIsLValue && !FromType->canDecayToPointerType() &&
-      S.Context.getCanonicalType(FromType) != S.Context.OverloadTy) {
-    SCS.First = ICK_Lvalue_To_Rvalue;
-
-    // C11 6.3.2.1p2:
-    //   ... if the lvalue has atomic type, the value has the non-atomic version
-    //   of the type of the lvalue ...
-    if (const AtomicType *Atomic = FromType->getAs<AtomicType>())
-      FromType = Atomic->getValueType();
 
-    // If T is a non-class type, the type of the rvalue is the
-    // cv-unqualified version of T. Otherwise, the type of the rvalue
-    // is T (C++ 4.1p1). C++ can't get here with class types; in C, we
-    // just strip the qualifiers because they don't matter.
-    FromType = FromType.getUnqualifiedType();
-  } else if (S.getLangOpts().HLSL && FromType->isConstantArrayType() &&
-             ToType->isConstantArrayType()) {
+  bool argIsLValue = From->isGLValue();
+  if (S.getLangOpts().HLSL && FromType->isConstantArrayType() &&
+      ToType->isConstantArrayType()) {
     // HLSL constant array parameters do not decay, so if the argument is a
     // constant array and the parameter is an ArrayParameterType we have special
     // handling here.
     if (ToType->isArrayParameterType()) {
       FromType = S.Context.getArrayParameterType(FromType);
       SCS.First = ICK_HLSL_Array_RValue;
+    } else if (FromType->isArrayParameterType()) {
+      FromType = S.Context.getConstantArrayFromArrayParameterType(FromType);
+      SCS.First = ICK_HLSL_Array_RValue;
     } else {
       SCS.First = ICK_Identity;
     }
@@ -2249,6 +2235,25 @@ static bool IsStandardConversion(Sema &S, Expr* From, QualType ToType,
 
     SCS.setAllToTypes(ToType);
     return true;
+  } else if (argIsLValue && !FromType->canDecayToPointerType() &&
+             S.Context.getCanonicalType(FromType) != S.Context.OverloadTy) {
+    // Lvalue-to-rvalue conversion (C++11 4.1):
+    //   A glvalue (3.10) of a non-function, non-array type T can
+    //   be converted to a prvalue.
+
+    SCS.First = ICK_Lvalue_To_Rvalue;
+
+    // C11 6.3.2.1p2:
+    //   ... if the lvalue has atomic type, the value has the non-atomic version
+    //   of the type of the lvalue ...
+    if (const AtomicType *Atomic = FromType->getAs<AtomicType>())
+      FromType = Atomic->getValueType();
+
+    // If T is a non-class type, the type of the rvalue is the
+    // cv-unqualified version of T. Otherwise, the type of the rvalue
+    // is T (C++ 4.1p1). C++ can't get here with class types; in C, we
+    // just strip the qualifiers because they don't matter.
+    FromType = FromType.getUnqualifiedType();
   } else if (FromType->isArrayType()) {
     // Array-to-pointer conversion (C++ 4.2)
     SCS.First = ICK_Array_To_Pointer;

clang/lib/Sema/SemaType.cpp

@@ -5675,6 +5675,9 @@ static TypeSourceInfo *GetFullTypeForDeclarator(TypeProcessingState &state,
   assert(!T.isNull() && "T must not be null at the end of this function");
   if (!AreDeclaratorChunksValid)
     return Context.getTrivialTypeSourceInfo(T);
+
+  if (state.didParseHLSLParamMod() && !T->isConstantArrayType())
+    T = S.HLSL().getInoutParameterType(T);
   return GetTypeSourceInfoForDeclarator(state, T, TInfo);
 }
 
@@ -8562,7 +8565,6 @@ static void HandleHLSLParamModifierAttr(TypeProcessingState &State,
     return;
   if (Attr.getSemanticSpelling() == HLSLParamModifierAttr::Keyword_inout ||
       Attr.getSemanticSpelling() == HLSLParamModifierAttr::Keyword_out) {
-    CurType = S.HLSL().getInoutParameterType(CurType);
     State.setParsedHLSLParamMod(true);
   }
 }

clang/test/AST/HLSL/ArrayOutArgExpr.hlsl

@@ -0,0 +1,63 @@
+// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-library -x hlsl -ast-dump %s | FileCheck %s
+
+// CHECK-LABEL: increment
+void increment(inout int Arr[2]) {
+  for (int I = 0; I < 2; I++)
+    Arr[0] += 2;
+}
+
+// CHECK-LABEL: call
+// CHECK: CallExpr 0x{{.*}} {{.*}} 'void'
+// CHECK: ImplicitCastExpr 0x{{.*}} {{.*}} 'void (*)(inout int[2])' <FunctionToPointerDecay>
+// CHECK: DeclRefExpr 0x{{.*}} {{.*}} 'void (inout int[2])' lvalue Function 0x{{.*}} 'increment' 'void (inout int[2])'
+// CHECK: HLSLOutArgExpr 0x{{.*}} {{.*}} 'int[2]' lvalue inout
+// CHECK: OpaqueValueExpr [[A:0x.*]] {{.*}} 'int[2]' lvalue
+// CHECK: DeclRefExpr [[B:0x.*]] {{.*}} 'int[2]' lvalue Var [[E:0x.*]] 'A' 'int[2]'
+// CHECK: OpaqueValueExpr [[C:0x.*]] {{.*}} 'int[2]' lvalue
+// CHECK: ImplicitCastExpr [[D:0x.*]] {{.*}} 'int[2]' <HLSLArrayRValue>
+// CHECK: OpaqueValueExpr [[A]] {{.*}} 'int[2]' lvalue
+// CHECK: DeclRefExpr [[B]] {{.*}} 'int[2]' lvalue Var [[E]] 'A' 'int[2]'
+// CHECK: BinaryOperator 0x{{.*}} {{.*}} 'int[2]' lvalue '='
+// CHECK: OpaqueValueExpr [[A]] {{.*}} 'int[2]' lvalue
+// CHECK: DeclRefExpr 0x{{.*}} {{.*}} 'int[2]' lvalue Var [[E]] 'A' 'int[2]'
+// CHECK: ImplicitCastExpr 0x{{.*}} {{.*}} 'int[2]' <HLSLArrayRValue>
+// CHECK: OpaqueValueExpr [[C]] {{.*}} 'int[2]' lvalue
+// CHECK: ImplicitCastExpr [[D]] {{.*}} 'int[2]' <HLSLArrayRValue>
+// CHECK: OpaqueValueExpr [[A]] {{.*}} 'int[2]' lvalue
+// CHECK: DeclRefExpr [[B]] {{.*}} 'int[2]' lvalue Var [[E]] 'A' 'int[2]'
+export int call() {
+  int A[2] = { 0, 1 };
+  increment(A);
+  return A[0];
+}
+
+// CHECK-LABEL: fn2
+void fn2(out int Arr[2]) {
+  Arr[0] += 5;
+  Arr[1] += 6;
+}
+
+// CHECK-LABEL: call2
+// CHECK: CallExpr 0x{{.*}} {{.*}} 'void'
+// CHECK: ImplicitCastExpr 0x{{.*}} {{.*}} 'void (*)(out int[2])' <FunctionToPointerDecay>
+// CHECK: DeclRefExpr 0x{{.*}} {{.*}} 'void (out int[2])' lvalue Function 0x{{.*}} 'fn2' 'void (out int[2])'
+// CHECK: HLSLOutArgExpr 0x{{.*}} {{.*}} 'int[2]' lvalue out
+// CHECK: OpaqueValueExpr [[A:0x.*]] {{.*}} 'int[2]' lvalue
+// CHECK: DeclRefExpr [[B:0x.*]] {{.*}} 'int[2]' lvalue Var [[E:0x.*]] 'A' 'int[2]'
+// CHECK: OpaqueValueExpr [[C:0x.*]] {{.*}} 'int[2]' lvalue
+// CHECK: ImplicitCastExpr [[D:0x.*]] {{.*}} 'int[2]' <HLSLArrayRValue>
+// CHECK: OpaqueValueExpr [[A]] {{.*}} 'int[2]' lvalue
+// CHECK: DeclRefExpr [[B]] {{.*}} 'int[2]' lvalue Var [[E]] 'A' 'int[2]'
+// CHECK: BinaryOperator 0x{{.*}} {{.*}} 'int[2]' lvalue '='
+// CHECK: OpaqueValueExpr [[A]] {{.*}} 'int[2]' lvalue
+// CHECK: DeclRefExpr [[B]] {{.*}} 'int[2]' lvalue Var [[E]] 'A' 'int[2]'
+// CHECK: ImplicitCastExpr 0x{{.*}} {{.*}} 'int[2]' <HLSLArrayRValue>
+// CHECK: OpaqueValueExpr [[C]] {{.*}} 'int[2]' lvalue
+// CHECK: ImplicitCastExpr [[D]] {{.*}} 'int[2]' <HLSLArrayRValue>
+// CHECK: OpaqueValueExpr [[A]] {{.*}} 'int[2]' lvalue
+// CHECK: DeclRefExpr [[B]] {{.*}} 'int[2]' lvalue Var [[E]] 'A' 'int[2]'
+export int call2() {
+  int A[2] = { 0, 1 };
+  fn2(A);
+  return 1;
+}

clang/test/CodeGenHLSL/ArrayAssignable.hlsl

@@ -100,18 +100,16 @@ void arr_assign6() {
 }
 
 // CHECK-LABEL: define void {{.*}}arr_assign7
-// CHECK: [[Arr3:%.*]] = alloca [2 x [2 x i32]], align 4
-// CHECK-NEXT: [[Arr4:%.*]] = alloca [2 x [2 x i32]], align 4
-// CHECK-NEXT: [[Tmp:%.*]] = alloca [2 x i32], align 4
+// CHECK: [[Arr:%.*]] = alloca [2 x [2 x i32]], align 4
+// CHECK-NEXT: [[Arr2:%.*]] = alloca [2 x [2 x i32]], align 4
 // CHECK-NOT: alloca
-// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[Arr3]], ptr align 4 {{@.*}}, i32 16, i1 false)
-// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[Arr4]], ptr align 4 {{@.*}}, i32 16, i1 false)
-// CHECK-NEXT: store i32 6, ptr [[Tmp]], align 4
-// CHECK-NEXT: [[AIE:%.*]] = getelementptr inbounds i32, ptr [[Tmp]], i32 1
-// CHECK-NEXT: store i32 6, ptr [[AIE]], align 4
-// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[Arr3]], ptr align 4 [[Arr4]], i32 16, i1 false)
-// CHECK-NEXT: [[Idx:%.*]] = getelementptr inbounds [2 x [2 x i32]], ptr [[Arr3]], i32 0, i32 0
-// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[Idx]], ptr align 4 [[Tmp]], i32 8, i1 false)
+// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[Arr]], ptr align 4 {{@.*}}, i32 16, i1 false)
+// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[Arr2]], ptr align 4 {{@.*}}, i32 16, i1 false)
+// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[Arr]], ptr align 4 [[Arr2]], i32 16, i1 false)
+// CHECK-NEXT: [[Idx:%.*]] = getelementptr inbounds [2 x [2 x i32]], ptr [[Arr]], i32 0, i32 0
+// CHECK-NEXT: store i32 6, ptr [[Idx]], align 4
+// CHECK-NEXT: [[Idx2:%.*]] = getelementptr inbounds i32, ptr %arrayidx, i32 1
+// CHECK-NEXT: store i32 6, ptr [[Idx2]], align 4
 // CHECK-NEXT: ret void
 void arr_assign7() {
   int Arr[2][2] = {{0, 1}, {2, 3}};

clang/test/CodeGenHLSL/ArrayTemporary.hlsl

@@ -46,9 +46,8 @@ void call3() {
 }
 
 // CHECK-LABEL: define void {{.*}}call4{{.*}}(ptr
-// CHECK-SAME: noundef byval([2 x [2 x float]]) align 4 [[Arr:%.*]])
 // CHECK: [[Tmp:%.*]] = alloca [2 x [2 x float]]
-// CHECK: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[Tmp]], ptr align 4 [[Arr]], i32 16, i1 false)
+// CHECK: store ptr {{.*}}, ptr [[Tmp]], align 4
 // CHECK: call void {{.*}}fn3{{.*}}(ptr noundef byval([2 x [2 x float]]) align 4 [[Tmp]])
 
 void call4(float Arr[2][2]) {
@@ -67,11 +66,11 @@ void call4(float Arr[2][2]) {
 // CHECK: [[Tmp1:%.*]] = alloca [2 x float]
 // CHECK: [[Tmp2:%.*]] = alloca [4 x float]
 // CHECK: [[Tmp3:%.*]] = alloca [3 x i32]
-// CHECK: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[Tmp1]], ptr align 4 [[FA2]], i32 8, i1 false)
+// CHECK: store ptr {{.*}}, ptr [[Tmp1]], align 4
 // CHECK: call void @"??$template_fn@$$BY01M@@YAXY01M@Z"(ptr noundef byval([2 x float]) align 4 [[Tmp1]])
-// CHECK: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[Tmp2]], ptr align 4 [[FA4]], i32 16, i1 false)
+// CHECK: store ptr {{.*}}, ptr [[Tmp2]], align 4
 // CHECK: call void @"??$template_fn@$$BY03M@@YAXY03M@Z"(ptr noundef byval([4 x float]) align 4 [[Tmp2]])
-// CHECK: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[Tmp3]], ptr align 4 [[IA3]], i32 12, i1 false)
+// CHECK: store ptr {{.*}}, ptr [[Tmp3]], align 4
 // CHECK: call void @"??$template_fn@$$BY02H@@YAXY02H@Z"(ptr noundef byval([3 x i32]) align 4 [[Tmp3]])
 
 template<typename T>
@@ -83,7 +82,6 @@ void template_call(float FA2[2], float FA4[4], int IA3[3]) {
   template_fn(IA3);
 }
 
-
 // Verify that Array parameter element access correctly codegens.
 // CHECK-LABEL: define void {{.*}}element_access{{.*}}(ptr
 // CHECK-SAME: noundef byval([2 x float]) align 4 [[FA2:%[0-9A-Z]+]]

clang/test/CodeGenHLSL/BasicFeatures/ArrayOutputArguments.hlsl

@@ -0,0 +1,48 @@
+// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-library -disable-llvm-passes -emit-llvm -finclude-default-header -o - %s | FileCheck %s
+
+// CHECK-LABEL: increment
+void increment(inout int Arr[2]) {
+  for (int I = 0; I < 2; I++)
+    Arr[0] += 2;
+}
+
+// CHECK-LABEL: call
+// CHECK: [[A:%.*]] = alloca [2 x i32], align 4
+// CHECK-NEXT: [[Tmp:%.*]] = alloca [2 x i32], align 4
+// CHECK-NEXT: [[Tmp2:%.*]] = alloca [2 x i32], align 4
+// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[A]], ptr align 4 @{{.*}}, i32 8, i1 false)
+// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[Tmp]], ptr align 4 [[A]], i32 8, i1 false)
+// CHECK-NEXT: store ptr [[Tmp]], ptr [[Tmp2]], align 4
+// CHECK-NEXT: call void @"?increment{{.*}}(ptr noalias noundef byval([2 x i32]) align 4 [[Tmp2]]) #3
+// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[A]], ptr align 4 [[Tmp]], i32 8, i1 false)
+// CHECK-NEXT: [[Idx:%.*]] = getelementptr inbounds [2 x i32], ptr [[A]], i32 0, i32 0
+// CHECK-NEXT: [[B:%.*]] = load i32, ptr [[Idx]], align 4
+// CHECK-NEXT: ret i32 [[B]]
+export int call() {
+  int A[2] = { 0, 1 };
+  increment(A);
+  return A[0];
+}
+
+// CHECK-LABEL: fn2
+void fn2(out int Arr[2]) {
+  Arr[0] += 5;
+  Arr[1] += 6;
+}
+
+// CHECK-LABEL: call2
+// CHECK: [[A:%.*]] = alloca [2 x i32], align 4
+// CHECK-NEXT: [[Tmp:%.*]] = alloca [2 x i32], align 4
+// CHECK-NEXT: [[Tmp2:%.*]] = alloca [2 x i32], align 4
+// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[A]], ptr align 4 @{{.*}}, i32 8, i1 false)
+// CHECK-NEXT: store ptr [[Tmp]], ptr [[Tmp2]], align 4
+// CHECK-NEXT: call void @"?fn2{{.*}}(ptr noalias noundef byval([2 x i32]) align 4 [[Tmp2]]) #3
+// CHECK-NEXT: call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[A]], ptr align 4 [[Tmp]], i32 8, i1 false)
+// CHECK-NEXT: [[Idx:%.*]] = getelementptr inbounds [2 x i32], ptr [[A]], i32 0, i32 0
+// CHECK-NEXT: [[B:%.*]] = load i32, ptr [[Idx]], align 4
+// CHECK-NEXT: ret i32 [[B]]
+export int call2() {
+  int A[2] = { 0, 1 };
+  fn2(A);
+  return A[0];
+}

clang/test/SemaHLSL/ArrayTemporary.hlsl

@@ -75,17 +75,14 @@ void template_fn(T Val) {}
 // CHECK: CallExpr {{.*}} 'void'
 // CHECK-NEXT: ImplicitCastExpr {{.*}} 'void (*)(float[2])' <FunctionToPointerDecay>
 // CHECK-NEXT: DeclRefExpr {{.*}} 'void (float[2])' lvalue Function {{.*}} 'template_fn' 'void (float[2])' (FunctionTemplate {{.*}} 'template_fn')
-// CHECK-NEXT: ImplicitCastExpr {{.*}} 'float[2]' <LValueToRValue>
 // CHECK-NEXT: DeclRefExpr {{.*}} 'float[2]' lvalue ParmVar {{.*}} 'FA2' 'float[2]'
 // CHECK-NEXT: CallExpr {{.*}} 'void'
 // CHECK-NEXT: ImplicitCastExpr {{.*}} 'void (*)(float[4])' <FunctionToPointerDecay>
 // CHECK-NEXT: DeclRefExpr {{.*}} 'void (float[4])' lvalue Function {{.*}} 'template_fn' 'void (float[4])' (FunctionTemplate {{.*}} 'template_fn')
-// CHECK-NEXT: ImplicitCastExpr {{.*}} 'float[4]' <LValueToRValue>
 // CHECK-NEXT: DeclRefExpr {{.*}} 'float[4]' lvalue ParmVar {{.*}} 'FA4' 'float[4]'
 // CHECK-NEXT: CallExpr {{.*}} 'void'
 // CHECK-NEXT: ImplicitCastExpr {{.*}} 'void (*)(int[3])' <FunctionToPointerDecay>
 // CHECK-NEXT: DeclRefExpr {{.*}} 'void (int[3])' lvalue Function {{.*}} 'template_fn' 'void (int[3])' (FunctionTemplate {{.*}} 'template_fn')
-// CHECK-NEXT: ImplicitCastExpr {{.*}} 'int[3]' <LValueToRValue>
 // CHECK-NEXT: DeclRefExpr {{.*}} 'int[3]' lvalue ParmVar {{.*}} 'IA3' 'int[3]'
 
 void call(float FA2[2], float FA4[4], int IA3[3]) {