diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/CodeGen/CGBuiltin.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp index e553eb6c27..2971436831 100644 --- a/lib/CodeGen/CGBuiltin.cpp +++ b/lib/CodeGen/CGBuiltin.cpp @@ -177,6 +177,15 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD, // See if we can constant fold this builtin. If so, don't emit it at all. Expr::EvalResult Result; if (E->Evaluate(Result, CGM.getContext())) { + // Short circuiting the __builtin_expect on its 1st argument + // must still IR-gen the 1st and 2nd argument's side-effect. + if (BuiltinID == Builtin::BI__builtin_expect) { + if (E->getArg(0)->HasSideEffects(getContext())) + (void)EmitScalarExpr(E->getArg(0)); + if (E->getArg(1)->HasSideEffects(getContext())) + (void)EmitScalarExpr(E->getArg(1)); + } + if (Result.Val.isInt()) return RValue::get(llvm::ConstantInt::get(getLLVMContext(), Result.Val.getInt())); |