[sil-llvm-gen] Allow for -Xllvm options to be passed to sil-llvm-gen. #84621
+41
−5
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Specifically, we ignore the -Xllvm bit and put the option into FrontendOptions.LLVMArgs so that parts of CompilerInvocation that assumes that -Xllvm flags will be placed there are actually there. We still pass through the argument to llvm::cl so it gets set that way as well.