diff options
Diffstat (limited to 'lib/CodeGen/CGBuiltin.cpp')
| -rw-r--r-- | lib/CodeGen/CGBuiltin.cpp | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp index faea4fe9d4..0f5e90fb15 100644 --- a/lib/CodeGen/CGBuiltin.cpp +++ b/lib/CodeGen/CGBuiltin.cpp @@ -59,6 +59,10 @@ static RValue EmitBinaryAtomicPost(CodeGenFunction& CGF, return RValue::get(CGF.Builder.CreateBinOp(Op, Result, Operand)); } +static llvm::ConstantInt *getInt32(llvm::LLVMContext &Context, int32_t Value) { + return llvm::ConstantInt::get(llvm::Type::getInt32Ty(Context), Value); +} + RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD, unsigned BuiltinID, const CallExpr *E) { // See if we can constant fold this builtin. If so, don't emit it at all. @@ -343,6 +347,20 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD, llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 1)); return RValue::get(Address); } + case Builtin::BI__builtin_dwarf_cfa: { + // The offset in bytes from the first argument to the CFA. + // + // Why on earth is this in the frontend? Is there any reason at + // all that the backend can't reasonably determine this while + // lowering llvm.eh.dwarf.cfa()? + // + // TODO: If there's a satisfactory reason, add a target hook for + // this instead of hard-coding 0, which is correct for most targets. + int32_t Offset = 0; + + Value *F = CGM.getIntrinsic(Intrinsic::eh_dwarf_cfa, 0, 0); + return RValue::get(Builder.CreateCall(F, getInt32(VMContext, Offset))); + } case Builtin::BI__builtin_return_address: { Value *Depth = EmitScalarExpr(E->getArg(0)); Depth = Builder.CreateIntCast(Depth, |