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`-fconstant-cfstrings`"
Relanding rL342883 with more fragmented tests to test ELF-specific
section emission separately from broad-scope CFString tests. Now this
tests the following separately
1). CoreFoundation builds and linkage for ELF while building it.
2). CFString ELF section emission outside CF in assembly output.
3). Broad scope `cfstring3.c` tests which cover all object formats at
bitcode level and assembly level (including ELF).
This fixes non-bridged CoreFoundation builds on ELF targets
that use -fconstant-cfstrings. The original changes from differential
for a similar patch to PE/COFF (https://reviews.llvm.org/D44491) did not
check for an edge case where the global could be a constant which surfaced
as an issue when building for ELF because of different linkage semantics.
This patch addresses several issues with crashes related to CF builds on ELF
as well as improves data layout by ensuring string literals that back
the actual CFConstStrings end up in .rodata in line with Mach-O.
Change itself tested with CoreFoundation on Linux x86_64 but should be valid
for BSD-like systems as well that use ELF as the native object format.
Differential Revision: https://reviews.llvm.org/D52344
llvm-svn: 343038
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`-fconstant-cfstrings`."
Seems to be causing buildbot failures, need to look into it.
llvm-svn: 342893
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Accidetanlly forgot to update it, big sorry.
llvm-svn: 342890
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The previous change was insufficient to mark the content as read-write as the
structure itself was marked constant. Adjust this and add tests to ensure that
the section is marked appropriately as being read-write.
llvm-svn: 277200
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Place the structure data into `cfstring`. This both isolates the structures to
permit coalescing in the future (by the linker) as well as ensures that it
doesnt get marked as read-only data. The structures themselves are not
read-only, only the string contents.
llvm-svn: 274956
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These tests currently expect MachO section names and do not provide a target.
Explicitly provide one.
llvm-svn: 271212
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Adjust the constant CFString emission to emit into more appropriate sections on
ELF and COFF targets. It would previously try to use MachO section names
irrespective of the file format.
llvm-svn: 271211
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