From 4a816471f527b90464806892feeecc242491a459 Mon Sep 17 00:00:00 2001 From: Bill Wendling Date: Sun, 5 Jan 2014 01:47:20 +0000 Subject: Emit an error message if the value passed to __builtin_returnaddress isn't a constant __builtin_returnaddress requires that the value passed into is be a constant. However, at -O0 even a constant expression may not be converted to a constant. Emit an error message intead of crashing. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198531 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/PowerPC/PPCISelLowering.cpp | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'lib/Target/PowerPC') diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp index a00e37ab98..630385cc7c 100644 --- a/lib/Target/PowerPC/PPCISelLowering.cpp +++ b/lib/Target/PowerPC/PPCISelLowering.cpp @@ -30,6 +30,7 @@ #include "llvm/IR/DerivedTypes.h" #include "llvm/IR/Function.h" #include "llvm/IR/Intrinsics.h" +#include "llvm/IR/LLVMContext.h" #include "llvm/Support/CommandLine.h" #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/MathExtras.h" @@ -7795,6 +7796,12 @@ SDValue PPCTargetLowering::LowerRETURNADDR(SDValue Op, MachineFrameInfo *MFI = MF.getFrameInfo(); MFI->setReturnAddressIsTaken(true); + if (!isa(Op.getOperand(0))) { + DAG.getContext()->emitError("argument to '__builtin_return_address' must " + "be a constant integer"); + return SDValue(); + } + SDLoc dl(Op); unsigned Depth = cast(Op.getOperand(0))->getZExtValue(); -- cgit v1.2.3