[IR]: Bug - dangling reference

[root-kidik]

/llvm-project/llvm/include/llvm/IR/DiagnosticInfo.h:584:10: error: cannot bind non-const lvalue reference of type 'llvm::OptimizationRemarkMissed&' to an rvalue of type 'llvm::OptimizationRemarkMissed'     

[Chen-Carl]

I encountered the same error when compiling with the latest gcc-15.0.0.

An OptimizationRemarkMissed instance is constructed as a temporary object using the return value. This temporary object is an rvalue, and the code attempts to use it continuously, especially when using the stream operator <<.

You can modify the code like this:

ORE.emit([&]() {
  OptimizationRemarkMissed R(DEBUG_TYPE, "IncreaseCostInOtherContexts", Call);
  R << "Not inlining. Cost of inlining '" << NV("Callee", Callee)
     << "' increases the cost of inlining '" << NV("Caller", Caller)
     << "' in other contexts";
return R;
});