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Added some documentation for the IrFuncTyArg structure, which is key to writing ABI transformations.

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Tomas Lindquist Olsen
2009-03-04 16:13:16 +01:00
parent f25bbe3d09
commit ca41cb29d9
1 changed files with 20 additions and 0 deletions
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20
ir/irfunction.h
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@@ -15,17 +15,37 @@ struct ABIRewrite;
// both explicit and implicit as well as return values
struct IrFuncTyArg : IrBase
{
/** This is the original D type as the frontend knows it
* May NOT be rewritten!!! */
Type* type;
/// This is the final LLVM Type used for the parameter/returnvalue type
const llvm::Type* ltype;
/** These are the final llvm attributes needed
* must be valid for the LLVM Type and byref setting */
unsigned attrs;
/** true if the argument final argument is a reference argument
* must be true when the D Type is a value type, but the final
* LLVM Type is a reference type */
bool byref;
/** Pointer to the ABIRewrite structure needed to rewrite llvm ValueS
* to match the final LLVM Type */
ABIRewrite* rewrite;
/// Helper to check is the 'inreg' attribute is set
bool isInReg() const { return (attrs & llvm::Attribute::InReg) != 0; }
/// Helper to check is the 'sret' attribute is set
bool isSRet() const { return (attrs & llvm::Attribute::StructRet) != 0; }
/// Helper to check is the 'byval' attribute is set
bool isByVal() const { return (attrs & llvm::Attribute::ByVal) != 0; }
/** Constructor
* @param t D type of argument/returnvalue as known by the frontend
* @param byref Initial value for the 'byref' field. If true the initial LLVM Type will be of type->pointerTo()
*/
IrFuncTyArg(Type* t, bool byref, unsigned a = 0);
};