diff options
| -rw-r--r-- | lib/CodeGen/CGBuiltin.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp index 8c3478c3b0..2b27bebe66 100644 --- a/lib/CodeGen/CGBuiltin.cpp +++ b/lib/CodeGen/CGBuiltin.cpp @@ -567,6 +567,14 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD, ConstantInt::get(llvm::Type::getInt32Ty(VMContext), 0)); Builder.CreateStore(FrameAddr, Buf); + // Store the stack pointer to the setjmp buffer. + Value *StackAddr = + Builder.CreateCall(CGM.getIntrinsic(Intrinsic::stacksave)); + Value *StackSaveSlot = + Builder.CreateGEP(Buf, ConstantInt::get(llvm::Type::getInt32Ty(VMContext), + 2)); + Builder.CreateStore(StackAddr, StackSaveSlot); + // Call LLVM's EH setjmp, which is lightweight. Value *F = CGM.getIntrinsic(Intrinsic::eh_sjlj_setjmp); Buf = Builder.CreateBitCast(Buf, llvm::Type::getInt8PtrTy(VMContext)); |