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Fix the AST tree so ir-gen can do the conversion via copy construction. 

Fixed pr5050.

llvm-svn: 82783
This commit is contained in:
Fariborz Jahanian 2009-09-25 18:11:25 +00:00
parent 1dbb8f78a3
commit 5aec1b54bc
2 changed files with 22 additions and 1 deletions
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4
clang/lib/Sema/SemaExprCXX.cpp
View File

@ -1113,7 +1113,9 @@ Sema::PerformImplicitConversion(Expr *&From, QualType ToType,
if (SCS.CopyConstructor) {
// FIXME: When can ToType be a reference type?
assert(!ToType->isReferenceType());
if (SCS.Second == ICK_Derived_To_Base)
ImpCastExprToType(From, ToType, CastExpr::CK_DerivedToBase,
/*isLvalue=*/true);
OwningExprResult FromResult =
BuildCXXConstructExpr(/*FIXME:ConstructLoc*/SourceLocation(),
ToType, SCS.CopyConstructor,

19
clang/test/CodeGenCXX/PR5050-constructor-conversion.cpp Normal file
View File

@ -0,0 +1,19 @@
// RUN: clang-cc -triple x86_64-apple-darwin -std=c++0x -S %s -o %t-64.s &&
// RUN: FileCheck -check-prefix LP64 --input-file=%t-64.s %s &&
// RUN: clang-cc -triple i386-apple-darwin -std=c++0x -S %s -o %t-32.s &&
// RUN: FileCheck -check-prefix LP32 --input-file=%t-32.s %s &&
// RUN: true
struct A { A(const A&); };
struct B : A { };
A f(const B &b) {
return b;
}
// CHECK-LP64: call __ZN1AC1ERK1A
// CHECK-LP32: call L__ZN1AC1ERK1A