[llvm-commits] [patch] More DW_AT_specification forward references fixes

[Rafael Espíndola]

This is a more general fix for pr11300. The test included in the patch
shows another path that can cause a subprogram die to be created
before its declaration. In this case, the definition is found when we
emit a DIE for a static local variable.

The patch fixes the problem by moving the check for a declaration to
CompileUnit::getOrCreateSubprogramDIE, which makes sure we cannot be
adding a definition before a declaration.

I am currently rebuilding firefox to see if this fixes all remaining
DW_AT_specification that point forward in the file. Is the patch OK if
it does?

Thanks,
Rafael
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