[clang] [llvm] Allow Custom LTO Linking And Fix Warp Sizes (PR #224691)

[Patrick Simmons via cfe-commits]

linuxrocks123 wrote:

@shiltian @arsenm I don't have any personal knowledge of why ROCm implements a custom LTO option.  I assumed there must be a good reason for it, or we wouldn't have done it.

The relevant SHA adding support is 9a91602c79d9f58c16f7e65bc6e5e801e795fcdb by Matthew Curtis, so @macurtis-amd would probably be the best person to ask.

https://github.com/llvm/llvm-project/pull/224691