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4 Commits

Author SHA1 Message Date
Haojian Wu bd4662cd3f [AST] Enhance the const expression evaluator to support error-dependent exprs. 
Fix a crash when evaluating a constexpr function which contains
recovery-exprs. https://bugs.llvm.org/show_bug.cgi?id=46837

Would be nice to have constant expression evaluator support general template
value-dependent expressions, but it requires more work.

This patch is a good start I think, to handle the error-only
value-dependent expressions.

Differential Revision: https://reviews.llvm.org/D84637
 2020-11-18 15:48:06 +01:00
Haojian Wu f8f1e5fb39 [AST] Fix dependence-bits for CXXDefaultInitExpr. 
Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D87382
 2020-09-21 08:47:01 +02:00
Haojian Wu 28ccd09d70 [AST][RecoveryExpr] Populate the dependence bits from CompoundStmt result expr to StmtExpr. 
Summary:
We lost errorBit for StmtExpr if a recoveryExpr is the result
expr of a CompoundStmt, which will lead to crashes.

```
// `-StmtExpr
//   `-CompoundStmt
//     `-RecoveryExp
({ invalid(); });
```

Reviewers: sammccall

Subscribers: cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D81154
 2020-06-08 15:31:08 +02:00
Haojian Wu 041080c247 [AST] Fix a crash on invalid constexpr Ctorinitializer when building RecoveryExpr. 
Summary:
crash stack:

```

lang:  workspace/llvm-project/clang/lib/AST/ExprConstant.cpp:13704: bool EvaluateInPlace(clang::APValue &, (anonymous namespace)::EvalInfo &, const (anonymous namespace)::LValue &, const clang::Expr *, bool): Assertion `!E->isValueDependent()' failed.
 #8  EvaluateInPlace(clang::APValue&, (anonymous namespace)::EvalInfo&, (anonymous namespace)::LValue const&, clang::Expr const*, bool)  workspace/llvm-project/clang/lib/AST/ExprConstant.cpp:0:0
 #9  HandleConstructorCall(clang::Expr const*, (anonymous namespace)::LValue const&, clang::APValue*, clang::CXXConstructorDecl const*, (anonymous namespace)::EvalInfo&, clang::APValue&)  workspace/llvm-project/clang/lib/AST/ExprConstant.cpp:5779:57
#10  HandleConstructorCall(clang::Expr const*, (anonymous namespace)::LValue const&, llvm::ArrayRef<clang::Expr const*>, clang::CXXConstructorDecl const*, (anonymous namespace)::EvalInfo&, clang::APValue&)  workspace/llvm-project/clang/lib/AST/ExprConstant.cpp:5819:10
#11  clang::Expr::isPotentialConstantExpr(clang::FunctionDecl const*, llvm::SmallVectorImpl<std::pair<clang::SourceLocation, clang::PartialDiagnostic> >&) workspace/llvm-project/clang/lib/AST/ExprConstant.cpp:14746:5
#12  CheckConstexprFunctionBody(clang::Sema&, clang::FunctionDecl const*, clang::Stmt*, clang::Sema::CheckConstexprKind)  workspace/llvm-project/clang/lib/Sema/SemaDeclCXX.cpp:2306:7
#13  clang::Sema::CheckConstexprFunctionDefinition(clang::FunctionDecl const*, clang::Sema::CheckConstexprKind)  workspace/llvm-project/clang/lib/Sema/SemaDeclCXX.cpp:1766:0
#14  clang::Sema::ActOnFinishFunctionBody(clang::Decl*, clang::Stmt*, bool)  workspace/llvm-project/clang/lib/Sema/SemaDecl.cpp:14357:9
#15  clang::Parser::ParseFunctionStatementBody(clang::Decl*, clang::Parser::ParseScope&)  workspace/llvm-project/clang/lib/Parse/ParseStmt.cpp:2213:18
```

Reviewers: sammccall

Reviewed By: sammccall

Subscribers: rsmith, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D77041
 2020-04-07 14:29:38 +02:00