[PATCH] D136012: [clang][Interp] Fix record members of reference type

[Timm Bäder via Phabricator via cfe-commits]

This revision was automatically updated to reflect the committed changes.
tbaeder marked an inline comment as done.
Closed by commit rG0ccff030f3b4: [clang][Interp] Fix record members of 
reference type (authored by tbaeder).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D136012/new/

https://reviews.llvm.org/D136012

Files:
  clang/lib/AST/Interp/ByteCodeExprGen.cpp
  clang/lib/AST/Interp/ByteCodeStmtGen.cpp
  clang/lib/AST/Interp/Interp.h
  clang/test/AST/Interp/references.cpp


Index: clang/test/AST/Interp/references.cpp
===
--- clang/test/AST/Interp/references.cpp
+++ clang/test/AST/Interp/references.cpp
@@ -88,3 +88,29 @@
   return j;
 }
 static_assert(RefToMemberExpr() == 11, "");
+
+struct Ref {
+  int 
+};
+
+constexpr int RecordWithRef() {
+  int m = 100;
+  Ref r{m};
+  m = 200;
+  return r.a;
+}
+static_assert(RecordWithRef() == 200, "");
+
+
+struct Ref2 {
+  int 
+  constexpr Ref2(int ) : a(a) {}
+};
+
+constexpr int RecordWithRef2() {
+  int m = 100;
+  Ref2 r(m);
+  m = 200;
+  return r.a;
+}
+static_assert(RecordWithRef2() == 200, "");
Index: clang/lib/AST/Interp/Interp.h
===
--- clang/lib/AST/Interp/Interp.h
+++ clang/lib/AST/Interp/Interp.h
@@ -470,6 +470,8 @@
   return true;
 }
 
+/// 1) Peeks a pointer on the stack
+/// 2) Pushes the value of the pointer's field on the stack
 template ::T>
 bool GetField(InterpState , CodePtr OpPC, uint32_t I) {
   const Pointer  = S.Stk.peek();
@@ -499,6 +501,8 @@
   return true;
 }
 
+/// 1) Pops a pointer from the stack
+/// 2) Pushes the value of the pointer's field on the stack
 template ::T>
 bool GetFieldPop(InterpState , CodePtr OpPC, uint32_t I) {
   const Pointer  = S.Stk.pop();
Index: clang/lib/AST/Interp/ByteCodeStmtGen.cpp
===
--- clang/lib/AST/Interp/ByteCodeStmtGen.cpp
+++ clang/lib/AST/Interp/ByteCodeStmtGen.cpp
@@ -105,7 +105,7 @@
   if (const FieldDecl *Member = Init->getMember()) {
 const Record::Field *F = R->getField(Member);
 
-if (Optional T = this->classify(InitExpr->getType())) {
+if (Optional T = this->classify(InitExpr)) {
   if (!this->emitThis(InitExpr))
 return false;
 
Index: clang/lib/AST/Interp/ByteCodeExprGen.cpp
===
--- clang/lib/AST/Interp/ByteCodeExprGen.cpp
+++ clang/lib/AST/Interp/ByteCodeExprGen.cpp
@@ -343,6 +343,8 @@
 const Record *R = getRecord(RD);
 const Record::Field *F = R->getField(FD);
 // Leave a pointer to the field on the stack.
+if (F->Decl->getType()->isReferenceType())
+  return this->emitGetFieldPop(PT_Ptr, F->Offset, E);
 return this->emitGetPtrField(F->Offset, E);
   }
 
@@ -809,7 +811,7 @@
   if (!this->emitDupPtr(Initializer))
 return false;
 
-  if (Optional T = classify(Init->getType())) {
+  if (Optional T = classify(Init)) {
 if (!this->visit(Init))
   return false;
 


Index: clang/test/AST/Interp/references.cpp
===
--- clang/test/AST/Interp/references.cpp
+++ clang/test/AST/Interp/references.cpp
@@ -88,3 +88,29 @@
   return j;
 }
 static_assert(RefToMemberExpr() == 11, "");
+
+struct Ref {
+  int 
+};
+
+constexpr int RecordWithRef() {
+  int m = 100;
+  Ref r{m};
+  m = 200;
+  return r.a;
+}
+static_assert(RecordWithRef() == 200, "");
+
+
+struct Ref2 {
+  int 
+  constexpr Ref2(int ) : a(a) {}
+};
+
+constexpr int RecordWithRef2() {
+  int m = 100;
+  Ref2 r(m);
+  m = 200;
+  return r.a;
+}
+static_assert(RecordWithRef2() == 200, "");
Index: clang/lib/AST/Interp/Interp.h
===
--- clang/lib/AST/Interp/Interp.h
+++ clang/lib/AST/Interp/Interp.h
@@ -470,6 +470,8 @@
   return true;
 }
 
+/// 1) Peeks a pointer on the stack
+/// 2) Pushes the value of the pointer's field on the stack
 template ::T>
 bool GetField(InterpState , CodePtr OpPC, uint32_t I) {
   const Pointer  = S.Stk.peek();
@@ -499,6 +501,8 @@
   return true;
 }
 
+/// 1) Pops a pointer from the stack
+/// 2) Pushes the value of the pointer's field on the stack
 template ::T>
 bool GetFieldPop(InterpState , CodePtr OpPC, uint32_t I) {
   const Pointer  = S.Stk.pop();
Index: clang/lib/AST/Interp/ByteCodeStmtGen.cpp
===
--- clang/lib/AST/Interp/ByteCodeStmtGen.cpp
+++ clang/lib/AST/Interp/ByteCodeStmtGen.cpp
@@ -105,7 +105,7 @@
   if (const FieldDecl *Member = Init->getMember()) {
 const Record::Field *F = R->getField(Member);
 
-if (Optional T = this->classify(InitExpr->getType())) {
+if (Optional T = this->classify(InitExpr)) {
   if (!this->emitThis(InitExpr))
 return false;
 
Index: 

[PATCH] D136012: [clang][Interp] Fix record members of reference type

[Timm Bäder via Phabricator via cfe-commits]

tbaeder marked an inline comment as done.
tbaeder added inline comments.



Comment at: clang/lib/AST/Interp/ByteCodeExprGen.cpp:867
 
-  if (Optional T = classify(Init->getType())) {
+  if (Optional T = classify(Init)) {
 if (!this->visit(Init))

shafik wrote:
> What is the effect here or is this just stylistic?
```
  llvm::Optional classify(const Expr *E) const {
return E->isGLValue() ? PT_Ptr : classify(E->getType());
  }
  llvm::Optional classify(QualType Ty) const {
return Ctx.classify(Ty);
  }
```
Passing the full `Expr` will return `PT_Ptr` for references.



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[PATCH] D136012: [clang][Interp] Fix record members of reference type

[Shafik Yaghmour via Phabricator via cfe-commits]

shafik accepted this revision.
shafik added a comment.
This revision is now accepted and ready to land.

LGTM




Comment at: clang/lib/AST/Interp/ByteCodeExprGen.cpp:867
 
-  if (Optional T = classify(Init->getType())) {
+  if (Optional T = classify(Init)) {
 if (!this->visit(Init))

What is the effect here or is this just stylistic?


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[PATCH] D136012: [clang][Interp] Fix record members of reference type

[Timm Bäder via Phabricator via cfe-commits]

tbaeder updated this revision to Diff 469580.

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D136012/new/

https://reviews.llvm.org/D136012

Files:
  clang/lib/AST/Interp/ByteCodeExprGen.cpp
  clang/lib/AST/Interp/ByteCodeStmtGen.cpp
  clang/lib/AST/Interp/Interp.h
  clang/test/AST/Interp/references.cpp


Index: clang/test/AST/Interp/references.cpp
===
--- clang/test/AST/Interp/references.cpp
+++ clang/test/AST/Interp/references.cpp
@@ -88,3 +88,29 @@
   return j;
 }
 static_assert(RefToMemberExpr() == 11, "");
+
+struct Ref {
+  int 
+};
+
+constexpr int RecordWithRef() {
+  int m = 100;
+  Ref r{m};
+  m = 200;
+  return r.a;
+}
+static_assert(RecordWithRef() == 200, "");
+
+
+struct Ref2 {
+  int 
+  constexpr Ref2(int ) : a(a) {}
+};
+
+constexpr int RecordWithRef2() {
+  int m = 100;
+  Ref2 r(m);
+  m = 200;
+  return r.a;
+}
+static_assert(RecordWithRef2() == 200, "");
Index: clang/lib/AST/Interp/Interp.h
===
--- clang/lib/AST/Interp/Interp.h
+++ clang/lib/AST/Interp/Interp.h
@@ -483,6 +483,8 @@
   return true;
 }
 
+/// 1) Peeks a pointer on the stack
+/// 2) Pushes the value of the pointer's field on the stack
 template ::T>
 bool GetField(InterpState , CodePtr OpPC, uint32_t I) {
   const Pointer  = S.Stk.peek();
@@ -512,6 +514,8 @@
   return true;
 }
 
+/// 1) Pops a pointer from the stack
+/// 2) Pushes the value of the pointer's field on the stack
 template ::T>
 bool GetFieldPop(InterpState , CodePtr OpPC, uint32_t I) {
   const Pointer  = S.Stk.pop();
Index: clang/lib/AST/Interp/ByteCodeStmtGen.cpp
===
--- clang/lib/AST/Interp/ByteCodeStmtGen.cpp
+++ clang/lib/AST/Interp/ByteCodeStmtGen.cpp
@@ -104,7 +104,7 @@
   if (const FieldDecl *Member = Init->getMember()) {
 const Record::Field *F = R->getField(Member);
 
-if (Optional T = this->classify(InitExpr->getType())) {
+if (Optional T = this->classify(InitExpr)) {
   if (!this->emitThis(InitExpr))
 return false;
 
Index: clang/lib/AST/Interp/ByteCodeExprGen.cpp
===
--- clang/lib/AST/Interp/ByteCodeExprGen.cpp
+++ clang/lib/AST/Interp/ByteCodeExprGen.cpp
@@ -392,6 +392,8 @@
 const Record *R = getRecord(RD);
 const Record::Field *F = R->getField(FD);
 // Leave a pointer to the field on the stack.
+if (F->Decl->getType()->isReferenceType())
+  return this->emitGetFieldPop(PT_Ptr, F->Offset, E);
 return this->emitGetPtrField(F->Offset, E);
   }
 
@@ -862,7 +864,7 @@
   if (!this->emitDupPtr(Initializer))
 return false;
 
-  if (Optional T = classify(Init->getType())) {
+  if (Optional T = classify(Init)) {
 if (!this->visit(Init))
   return false;
 


Index: clang/test/AST/Interp/references.cpp
===
--- clang/test/AST/Interp/references.cpp
+++ clang/test/AST/Interp/references.cpp
@@ -88,3 +88,29 @@
   return j;
 }
 static_assert(RefToMemberExpr() == 11, "");
+
+struct Ref {
+  int 
+};
+
+constexpr int RecordWithRef() {
+  int m = 100;
+  Ref r{m};
+  m = 200;
+  return r.a;
+}
+static_assert(RecordWithRef() == 200, "");
+
+
+struct Ref2 {
+  int 
+  constexpr Ref2(int ) : a(a) {}
+};
+
+constexpr int RecordWithRef2() {
+  int m = 100;
+  Ref2 r(m);
+  m = 200;
+  return r.a;
+}
+static_assert(RecordWithRef2() == 200, "");
Index: clang/lib/AST/Interp/Interp.h
===
--- clang/lib/AST/Interp/Interp.h
+++ clang/lib/AST/Interp/Interp.h
@@ -483,6 +483,8 @@
   return true;
 }
 
+/// 1) Peeks a pointer on the stack
+/// 2) Pushes the value of the pointer's field on the stack
 template ::T>
 bool GetField(InterpState , CodePtr OpPC, uint32_t I) {
   const Pointer  = S.Stk.peek();
@@ -512,6 +514,8 @@
   return true;
 }
 
+/// 1) Pops a pointer from the stack
+/// 2) Pushes the value of the pointer's field on the stack
 template ::T>
 bool GetFieldPop(InterpState , CodePtr OpPC, uint32_t I) {
   const Pointer  = S.Stk.pop();
Index: clang/lib/AST/Interp/ByteCodeStmtGen.cpp
===
--- clang/lib/AST/Interp/ByteCodeStmtGen.cpp
+++ clang/lib/AST/Interp/ByteCodeStmtGen.cpp
@@ -104,7 +104,7 @@
   if (const FieldDecl *Member = Init->getMember()) {
 const Record::Field *F = R->getField(Member);
 
-if (Optional T = this->classify(InitExpr->getType())) {
+if (Optional T = this->classify(InitExpr)) {
   if (!this->emitThis(InitExpr))
 return false;
 
Index: clang/lib/AST/Interp/ByteCodeExprGen.cpp
===
--- clang/lib/AST/Interp/ByteCodeExprGen.cpp
+++ clang/lib/AST/Interp/ByteCodeExprGen.cpp
@@ -392,6 +392,8 @@
   

[PATCH] D136012: [clang][Interp] Fix record members of reference type

[Timm Bäder via Phabricator via cfe-commits]

tbaeder updated this revision to Diff 468000.

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D136012/new/

https://reviews.llvm.org/D136012

Files:
  clang/lib/AST/Interp/ByteCodeExprGen.cpp
  clang/lib/AST/Interp/ByteCodeStmtGen.cpp
  clang/lib/AST/Interp/Interp.h
  clang/test/AST/Interp/references.cpp


Index: clang/test/AST/Interp/references.cpp
===
--- clang/test/AST/Interp/references.cpp
+++ clang/test/AST/Interp/references.cpp
@@ -88,3 +88,29 @@
   return j;
 }
 static_assert(RefToMemberExpr() == 11, "");
+
+struct Ref {
+  int 
+};
+
+constexpr int RecordWithRef() {
+  int m = 100;
+  Ref r{m};
+  m = 200;
+  return r.a;
+}
+static_assert(RecordWithRef() == 200, "");
+
+
+struct Ref2 {
+  int 
+  constexpr Ref2(int ) : a(a) {}
+};
+
+constexpr int RecordWithRef2() {
+  int m = 100;
+  Ref2 r(m);
+  m = 200;
+  return r.a;
+}
+static_assert(RecordWithRef2() == 200, "");
Index: clang/lib/AST/Interp/Interp.h
===
--- clang/lib/AST/Interp/Interp.h
+++ clang/lib/AST/Interp/Interp.h
@@ -478,9 +478,11 @@
   return true;
 }
 
+/// 1) Pops a pointer from the stack
+/// 2) Pushes the value of the pointer's field on the stack
 template ::T>
 bool GetField(InterpState , CodePtr OpPC, uint32_t I) {
-  const Pointer  = S.Stk.peek();
+  const Pointer  = S.Stk.pop();
   if (!CheckNull(S, OpPC, Obj, CSK_Field))
   return false;
   if (!CheckRange(S, OpPC, Obj, CSK_Field))
Index: clang/lib/AST/Interp/ByteCodeStmtGen.cpp
===
--- clang/lib/AST/Interp/ByteCodeStmtGen.cpp
+++ clang/lib/AST/Interp/ByteCodeStmtGen.cpp
@@ -104,7 +104,7 @@
   if (const FieldDecl *Member = Init->getMember()) {
 const Record::Field *F = R->getField(Member);
 
-if (Optional T = this->classify(InitExpr->getType())) {
+if (Optional T = this->classify(InitExpr)) {
   if (!this->emitThis(InitExpr))
 return false;
 
Index: clang/lib/AST/Interp/ByteCodeExprGen.cpp
===
--- clang/lib/AST/Interp/ByteCodeExprGen.cpp
+++ clang/lib/AST/Interp/ByteCodeExprGen.cpp
@@ -397,6 +397,8 @@
 const Record *R = getRecord(RD);
 const Record::Field *F = R->getField(FD);
 // Leave a pointer to the field on the stack.
+if (F->Decl->getType()->isReferenceType())
+  return this->emitGetField(PT_Ptr, F->Offset, E);
 return this->emitGetPtrField(F->Offset, E);
   }
 
@@ -871,7 +873,7 @@
   if (!this->emitDupPtr(Initializer))
 return false;
 
-  if (Optional T = classify(Init->getType())) {
+  if (Optional T = classify(Init)) {
 if (!this->visit(Init))
   return false;
 


Index: clang/test/AST/Interp/references.cpp
===
--- clang/test/AST/Interp/references.cpp
+++ clang/test/AST/Interp/references.cpp
@@ -88,3 +88,29 @@
   return j;
 }
 static_assert(RefToMemberExpr() == 11, "");
+
+struct Ref {
+  int 
+};
+
+constexpr int RecordWithRef() {
+  int m = 100;
+  Ref r{m};
+  m = 200;
+  return r.a;
+}
+static_assert(RecordWithRef() == 200, "");
+
+
+struct Ref2 {
+  int 
+  constexpr Ref2(int ) : a(a) {}
+};
+
+constexpr int RecordWithRef2() {
+  int m = 100;
+  Ref2 r(m);
+  m = 200;
+  return r.a;
+}
+static_assert(RecordWithRef2() == 200, "");
Index: clang/lib/AST/Interp/Interp.h
===
--- clang/lib/AST/Interp/Interp.h
+++ clang/lib/AST/Interp/Interp.h
@@ -478,9 +478,11 @@
   return true;
 }
 
+/// 1) Pops a pointer from the stack
+/// 2) Pushes the value of the pointer's field on the stack
 template ::T>
 bool GetField(InterpState , CodePtr OpPC, uint32_t I) {
-  const Pointer  = S.Stk.peek();
+  const Pointer  = S.Stk.pop();
   if (!CheckNull(S, OpPC, Obj, CSK_Field))
   return false;
   if (!CheckRange(S, OpPC, Obj, CSK_Field))
Index: clang/lib/AST/Interp/ByteCodeStmtGen.cpp
===
--- clang/lib/AST/Interp/ByteCodeStmtGen.cpp
+++ clang/lib/AST/Interp/ByteCodeStmtGen.cpp
@@ -104,7 +104,7 @@
   if (const FieldDecl *Member = Init->getMember()) {
 const Record::Field *F = R->getField(Member);
 
-if (Optional T = this->classify(InitExpr->getType())) {
+if (Optional T = this->classify(InitExpr)) {
   if (!this->emitThis(InitExpr))
 return false;
 
Index: clang/lib/AST/Interp/ByteCodeExprGen.cpp
===
--- clang/lib/AST/Interp/ByteCodeExprGen.cpp
+++ clang/lib/AST/Interp/ByteCodeExprGen.cpp
@@ -397,6 +397,8 @@
 const Record *R = getRecord(RD);
 const Record::Field *F = R->getField(FD);
 // Leave a pointer to the field on the stack.
+if (F->Decl->getType()->isReferenceType())
+  return 

[PATCH] D136012: [clang][Interp] Fix record members of reference type

[Timm Bäder via Phabricator via cfe-commits]

tbaeder created this revision.
tbaeder added reviewers: aaron.ballman, erichkeane, tahonermann, shafik.
Herald added a project: All.
tbaeder requested review of this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

  When assigning to them, we can't classify the expression type, because
  that doesn't contain the right information.
  
  And when reading from them, we need to do the extra deref, just like we
  do when reading from a DeclRefExpr.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D136012

Files:
  clang/lib/AST/Interp/ByteCodeExprGen.cpp
  clang/lib/AST/Interp/ByteCodeStmtGen.cpp
  clang/test/AST/Interp/references.cpp


Index: clang/test/AST/Interp/references.cpp
===
--- clang/test/AST/Interp/references.cpp
+++ clang/test/AST/Interp/references.cpp
@@ -88,3 +88,29 @@
   return j;
 }
 static_assert(RefToMemberExpr() == 11, "");
+
+struct Ref {
+  int 
+};
+
+constexpr int RecordWithRef() {
+  int m = 100;
+  Ref r{m};
+  m = 200;
+  return r.a;
+}
+static_assert(RecordWithRef() == 200, "");
+
+
+struct Ref2 {
+  int 
+  constexpr Ref2(int ) : a(a) {}
+};
+
+constexpr int RecordWithRef2() {
+  int m = 100;
+  Ref2 r(m);
+  m = 200;
+  return r.a;
+}
+static_assert(RecordWithRef2() == 200, "");
Index: clang/lib/AST/Interp/ByteCodeStmtGen.cpp
===
--- clang/lib/AST/Interp/ByteCodeStmtGen.cpp
+++ clang/lib/AST/Interp/ByteCodeStmtGen.cpp
@@ -104,7 +104,7 @@
   if (const FieldDecl *Member = Init->getMember()) {
 const Record::Field *F = R->getField(Member);
 
-if (Optional T = this->classify(InitExpr->getType())) {
+if (Optional T = this->classify(InitExpr)) {
   if (!this->emitThis(InitExpr))
 return false;
 
Index: clang/lib/AST/Interp/ByteCodeExprGen.cpp
===
--- clang/lib/AST/Interp/ByteCodeExprGen.cpp
+++ clang/lib/AST/Interp/ByteCodeExprGen.cpp
@@ -397,7 +397,11 @@
 const Record *R = getRecord(RD);
 const Record::Field *F = R->getField(FD);
 // Leave a pointer to the field on the stack.
-return this->emitGetPtrField(F->Offset, E);
+if (!this->emitGetPtrField(F->Offset, E))
+  return false;
+if (F->Decl->getType()->isReferenceType())
+  return this->emitLoadPopPtr(E);
+return true;
   }
 
   return false;
@@ -871,7 +875,7 @@
   if (!this->emitDupPtr(Initializer))
 return false;
 
-  if (Optional T = classify(Init->getType())) {
+  if (Optional T = classify(Init)) {
 if (!this->visit(Init))
   return false;
 


Index: clang/test/AST/Interp/references.cpp
===
--- clang/test/AST/Interp/references.cpp
+++ clang/test/AST/Interp/references.cpp
@@ -88,3 +88,29 @@
   return j;
 }
 static_assert(RefToMemberExpr() == 11, "");
+
+struct Ref {
+  int 
+};
+
+constexpr int RecordWithRef() {
+  int m = 100;
+  Ref r{m};
+  m = 200;
+  return r.a;
+}
+static_assert(RecordWithRef() == 200, "");
+
+
+struct Ref2 {
+  int 
+  constexpr Ref2(int ) : a(a) {}
+};
+
+constexpr int RecordWithRef2() {
+  int m = 100;
+  Ref2 r(m);
+  m = 200;
+  return r.a;
+}
+static_assert(RecordWithRef2() == 200, "");
Index: clang/lib/AST/Interp/ByteCodeStmtGen.cpp
===
--- clang/lib/AST/Interp/ByteCodeStmtGen.cpp
+++ clang/lib/AST/Interp/ByteCodeStmtGen.cpp
@@ -104,7 +104,7 @@
   if (const FieldDecl *Member = Init->getMember()) {
 const Record::Field *F = R->getField(Member);
 
-if (Optional T = this->classify(InitExpr->getType())) {
+if (Optional T = this->classify(InitExpr)) {
   if (!this->emitThis(InitExpr))
 return false;
 
Index: clang/lib/AST/Interp/ByteCodeExprGen.cpp
===
--- clang/lib/AST/Interp/ByteCodeExprGen.cpp
+++ clang/lib/AST/Interp/ByteCodeExprGen.cpp
@@ -397,7 +397,11 @@
 const Record *R = getRecord(RD);
 const Record::Field *F = R->getField(FD);
 // Leave a pointer to the field on the stack.
-return this->emitGetPtrField(F->Offset, E);
+if (!this->emitGetPtrField(F->Offset, E))
+  return false;
+if (F->Decl->getType()->isReferenceType())
+  return this->emitLoadPopPtr(E);
+return true;
   }
 
   return false;
@@ -871,7 +875,7 @@
   if (!this->emitDupPtr(Initializer))
 return false;
 
-  if (Optional T = classify(Init->getType())) {
+  if (Optional T = classify(Init)) {
 if (!this->visit(Init))
   return false;
 
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