[llvm-commits] [patch][lto] Use MC to scan for symbol definitions and uses

[Rafael Ávila de Espíndola]

The attached patch changes LTO to use MC for scanning symbol definitions
and uses. It is not as complete as it could be, but it already handles
some interesting cases:

* A single .globl produces an undefined reference
* Uses with no definitions produce undefined references
* Definitions are correctly tracked as being local or global
* Macro expansions are handled correctly :-)

The patch also changes LLVM's handling of module level asm to make sure
it always ends in a new line. This makes it easy to just pass that
string to MC and match what we would see if printing to a file.

Cheers,
Rafael
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