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Implement __builtin_bswap32 and __builtin_bswap64. 

llvm-svn: 44521
This commit is contained in:
Anders Carlsson 2007-12-02 21:58:10 +00:00
parent 4e4186b2de
commit ef93b9d011
2 changed files with 14 additions and 0 deletions
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12
clang/CodeGen/CGBuiltin.cpp
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@ -100,6 +100,18 @@ RValue CodeGenFunction::EmitBuiltinExpr(unsigned BuiltinID, const CallExpr *E) {
llvm::Value *Condition = EmitScalarExpr(E->getArg(0));
return RValue::get(Condition);
}
case Builtin::BI__builtin_bswap32:
case Builtin::BI__builtin_bswap64: {
llvm::Value *ArgValue = EmitScalarExpr(E->getArg(0));
const llvm::Type *ArgType = ArgValue->getType();
llvm::Value *F =
llvm::Intrinsic::getDeclaration(&CGM.getModule(),
llvm::Intrinsic::bswap,
&ArgType, 1);
llvm::Value *V = Builder.CreateCall(F, ArgValue, "tmp");
return RValue::get(V);
}
}
return RValue::get(0);

2
clang/include/clang/AST/Builtins.def
View File

@ -74,6 +74,8 @@ BUILTIN(__builtin_ctzll, "iULLi", "nc")
// Random GCC builtins
BUILTIN(__builtin_bswap32, "UiUi", "nc")
BUILTIN(__builtin_bswap64, "ULLiULLi", "nc")
BUILTIN(__builtin_constant_p, "UsUs", "nc")
BUILTIN(__builtin_classify_type, "i.", "nc")
BUILTIN(__builtin___CFStringMakeConstantString, "FC*cC*", "nc")