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Dear LLVM devs, I'm just working on the LLVM assembler's handling of .file and .line directives. I've noticed some strange things and am wondering if there is a reason the code works the way it does. 1. MCContext keeps a map of number -> MCDwarfLineTable called MCDwarfLineTablesCUMap. However, as far as I can see, the only compilation unit number which is *ever* used is zero! If this is true, then the map is not serving any useful purpose. What was the intention of the CU ID numbers? If multiple .file directives appear in the asm, each one should...

...t;>> I'm just working on the LLVM assembler's handling of .file and .line >>> directives. I've noticed some strange things and am wondering if there is a >>> reason the code works the way it does. >>> >>> 1. MCContext keeps a map of number -> MCDwarfLineTable called >>> MCDwarfLineTablesCUMap. However, as far as I can see, the only compilation >>> unit number which is *ever* used is zero! If this is true, then the map is >>> not serving any useful purpose. >>> >>> What was the intention of the CU ID numbers?...