Author: baldrick
Date: Mon Jan 21 15:37:41 2008
New Revision: 46216
URL: http://llvm.org/viewvc/llvm-project?rev=46216&view=rev
Log:
It turns out that in C++ it is legal to declare functions
that return an opaque type by value, as long as you don't
call it or provide a body (you can take the address of it).
So it is wrong to insist that sret parameters not be an
opaque*. And I guess it is really up to codegen to complain
if someone tries to call such a function. I'm also removing
the analogous check from byval parameters, since I don't
see why we shouldn't allow them as long as no-one tries to
call the function or give it a body.
Modified:
llvm/trunk/lib/VMCore/ParameterAttributes.cpp
Modified: llvm/trunk/lib/VMCore/ParameterAttributes.cpp
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/VMCore/ParameterAttributes.cpp?rev=46216&r1=46215&r2=46216&view=diff
==============================================================================
--- llvm/trunk/lib/VMCore/ParameterAttributes.cpp (original)
+++ llvm/trunk/lib/VMCore/ParameterAttributes.cpp Mon Jan 21 15:37:41 2008
@@ -200,14 +200,9 @@
// Attributes that only apply to integers.
Incompatible |= SExt | ZExt;
- if (const PointerType *PTy = dyn_cast<PointerType>(Ty)) {
- if (!PTy->getElementType()->isSized())
- // The byval and sret attributes only apply to pointers to sized types.
- Incompatible |= ByVal | StructRet;
- } else {
+ if (!isa<PointerType>(Ty))
// Attributes that only apply to pointers.
Incompatible |= ByVal | Nest | NoAlias | StructRet;
- }
return Incompatible;
}
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