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2a12c4e5bd
When emitting assembly there's no support for emitting separate line tables for each compilation unit - so LLVM emits .loc directives producing a single line table. Line tables have an implicit directory (index 0) equal to the compilation directory (DW_AT_comp_dir) of the compilation unit that references them. If multiple compilation units (with possibly disparate compilation directories) reference the same line table, we must avoid relying on this ambiguous directory. Achieve this my simply not setting the compilation directory on the line table when we're in this situation (multiple units while emitting assembly). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@204094 91177308-0d34-0410-b5e6-96231b3b80d8
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