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a535687c39
This recommits r337910 after fixing an "ambiguous call to addAttribute" error with some compilers (gcc circa 4.9 and MSVC). It seems that these compilers will consider a "false -> pointer" conversion during overload resolution. This creates ambiguity because one I added an overload which takes a MCExpr * as an argument. I fix this by making the new overload take MCExpr&, which avoids the conversion. It also documents the fact that we expect a valid MCExpr object. Original commit message follows: The motivation for this is D49493, where we'd like to test details of debug_str_offsets behavior which is difficult to trigger from a traditional test. This adds the plubming necessary for dwarfgen to generate this section. The more interesting changes are: - I've moved emitStringOffsetsTableHeader function from DwarfFile to DwarfStringPool, so I can generate the section header more easily from the unit test. - added a new addAttribute overload taking an MCExpr*. This is used to generate the DW_AT_str_offsets_base, which links a compile unit to the offset table. I've also added a basic test for reading and writing DW_form_strx forms. Reviewers: dblaikie, JDevlieghere, probinson Subscribers: llvm-commits, aprantl Differential Revision: https://reviews.llvm.org/D49670 llvm-svn: 337933 |
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