diff options
Diffstat (limited to 'lib/CodeGen/TargetInfo.h')
| -rw-r--r-- | lib/CodeGen/TargetInfo.h | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/lib/CodeGen/TargetInfo.h b/lib/CodeGen/TargetInfo.h index 88b4997d48cc..bb50ce69e312 100644 --- a/lib/CodeGen/TargetInfo.h +++ b/lib/CodeGen/TargetInfo.h @@ -15,8 +15,8 @@ #ifndef CLANG_CODEGEN_TARGETINFO_H #define CLANG_CODEGEN_TARGETINFO_H -#include "clang/Basic/LLVM.h" #include "clang/AST/Type.h" +#include "clang/Basic/LLVM.h" #include "llvm/ADT/StringRef.h" namespace llvm { @@ -158,10 +158,13 @@ namespace clang { /// - the conventions are substantively different in how they pass /// arguments, because in this case using the variadic convention /// will lead to C99 violations. - /// It is not necessarily correct when arguments are passed in the - /// same way and some out-of-band information is passed for the - /// benefit of variadic callees, as is the case for x86-64. - /// In this case the ABI should be consulted. + /// + /// However, some platforms make the conventions identical except + /// for passing additional out-of-band information to a variadic + /// function: for example, x86-64 passes the number of SSE + /// arguments in %al. On these platforms, it is desireable to + /// call unprototyped functions using the variadic convention so + /// that unprototyped calls to varargs functions still succeed. virtual bool isNoProtoCallVariadic(const CodeGen::CallArgList &args, const FunctionNoProtoType *fnType) const; }; |