[llvm-commits] [patch] Remove what looks like dead code in the production of debug lines

[Rafael Espíndola]

The attached patch removes what looks like dead code for the case of
producing a .debug_line section with no entries. I think it is dead
because we only emit these tables if we found a line directive.

The gnu assembler has some strange logic on when it prints data to
these sections, but if it is forced to print an "empty" .debug_line
section, it stops after the header:

readelf -x .debug_line test-as.o

Hex dump of section '.debug_line':
  0x00000000 19000000 02001300 00000101 fb0e0d00 ................
  0x00000010 01010101 00000001 00000100 00       .............

Which is exactly what we would print with this patch.

Is it OK?

Cheers,
Rafael
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