[PATCH] D88339: [XCOFF] Enable -fdata-sections on AIX

[Jason Liu via Phabricator via llvm-commits]

jasonliu created this revision.
jasonliu added reviewers: daltenty, hubert.reinterpretcast, DiggerLin, Xiangling_L.
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Some design decision worth noting about:

I've noticed a recent mailing discussing about why string literal is not affected by -fdata-sections for ELF target:
http://lists.llvm.org/pipermail/llvm-dev/2020-September/145121.html

But on AIX, our linker could not split the mergeable string like other target. 
So I think it would make more sense for us to emit separate csect a mergeable string in -fdata-sections mode,
as there might not be other ways for linker to do garbage collection on unused mergeable string.


https://reviews.llvm.org/D88339

Files:
  llvm/lib/CodeGen/TargetLoweringObjectFileImpl.cpp
  llvm/lib/Target/PowerPC/PPCAsmPrinter.cpp
  llvm/test/CodeGen/PowerPC/aix-xcoff-data-sections.ll

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