diff options
| author | Peter Collingbourne <peter@pcc.me.uk> | 2011-04-19 18:51:51 +0000 |
|---|---|---|
| committer | Peter Collingbourne <peter@pcc.me.uk> | 2011-04-19 18:51:51 +0000 |
| commit | 1c860d5640e8eebb11a5d515a761242b66761b0b (patch) | |
| tree | 08f9a77fbd1e2237d1137c5d80ca402105939309 /lib/AST/ExprClassification.cpp | |
| parent | e294ab717fc9535429ca5d8f575d41ae4441d822 (diff) | |
Add a new expression classification, CL_AddressableVoid
CL_AddressableVoid is the expression classification used for void
expressions whose address can be taken, i.e. the result of [], *
or void variable references in C, as opposed to things like the
result of a void function call.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129783 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/AST/ExprClassification.cpp')
| -rw-r--r-- | lib/AST/ExprClassification.cpp | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/lib/AST/ExprClassification.cpp b/lib/AST/ExprClassification.cpp index 803bc561ba..0d01880414 100644 --- a/lib/AST/ExprClassification.cpp +++ b/lib/AST/ExprClassification.cpp @@ -61,8 +61,10 @@ Cl Expr::ClassifyImpl(ASTContext &Ctx, SourceLocation *Loc) const { if (TR->isFunctionType() || TR == Ctx.OverloadTy) kind = Cl::CL_Function; // No void either, but qualified void is OK because it is "other than void". - else if (TR->isVoidType() && !Ctx.getCanonicalType(TR).hasQualifiers()) - kind = Cl::CL_Void; + // Void "lvalues" are classified as addressable void values, which are void + // expressions whose address can be taken. + else if (TR->isVoidType() && !TR.hasQualifiers()) + kind = (kind == Cl::CL_LValue ? Cl::CL_AddressableVoid : Cl::CL_Void); } // Enable this assertion for testing. @@ -71,6 +73,7 @@ Cl Expr::ClassifyImpl(ASTContext &Ctx, SourceLocation *Loc) const { case Cl::CL_XValue: assert(getValueKind() == VK_XValue); break; case Cl::CL_Function: case Cl::CL_Void: + case Cl::CL_AddressableVoid: case Cl::CL_DuplicateVectorComponents: case Cl::CL_MemberFunction: case Cl::CL_SubObjCPropertySetting: @@ -563,7 +566,8 @@ Expr::LValueClassification Expr::ClassifyLValue(ASTContext &Ctx) const { case Cl::CL_LValue: return LV_Valid; case Cl::CL_XValue: return LV_InvalidExpression; case Cl::CL_Function: return LV_NotObjectType; - case Cl::CL_Void: return LV_IncompleteVoidType; + case Cl::CL_Void: return LV_InvalidExpression; + case Cl::CL_AddressableVoid: return LV_IncompleteVoidType; case Cl::CL_DuplicateVectorComponents: return LV_DuplicateVectorComponents; case Cl::CL_MemberFunction: return LV_MemberFunction; case Cl::CL_SubObjCPropertySetting: return LV_SubObjCPropertySetting; @@ -582,7 +586,8 @@ Expr::isModifiableLvalue(ASTContext &Ctx, SourceLocation *Loc) const { case Cl::CL_LValue: break; case Cl::CL_XValue: return MLV_InvalidExpression; case Cl::CL_Function: return MLV_NotObjectType; - case Cl::CL_Void: return MLV_IncompleteVoidType; + case Cl::CL_Void: return MLV_InvalidExpression; + case Cl::CL_AddressableVoid: return MLV_IncompleteVoidType; case Cl::CL_DuplicateVectorComponents: return MLV_DuplicateVectorComponents; case Cl::CL_MemberFunction: return MLV_MemberFunction; case Cl::CL_SubObjCPropertySetting: return MLV_SubObjCPropertySetting; |