From 7a50b280c18e93e005fb3206ce16df2c70e83a97 Mon Sep 17 00:00:00 2001 From: Eric Christopher Date: Tue, 27 Oct 2009 00:52:25 +0000 Subject: Add objectsize intrinsic and hook it up through codegen. Doesn't do anything than return "I don't know" at the moment. llvm-svn: 85189 --- llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp') diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp index f3a06221578..b220d55f548 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp @@ -4204,6 +4204,18 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) { DAG.setRoot(Result); return 0; } + case Intrinsic::objectsize: { + // If we don't know by now, we're never going to know. + ConstantInt *CI = dyn_cast(I.getOperand(2)); + + assert(CI && "Non-constant type in __builtin_object_size?"); + + if (CI->getZExtValue() < 2) + setValue(&I, DAG.getConstant(-1, MVT::i32)); + else + setValue(&I, DAG.getConstant(0, MVT::i32)); + return 0; + } case Intrinsic::var_annotation: // Discard annotate attributes return 0; -- cgit v1.2.3