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Summary:
After r304661, module flag to record objective-c image info section is
encoded without whitespaces after comma. The new name is equivalent to
the old one, except that when LTO a module built by old compiler and a
module built by a new compiler, it will fail with conflicting values.
Fix the issue by removing whitespaces in bitcode upgrade path.
rdar://problem/34416934
Reviewers: compnerd
Reviewed By: compnerd
Subscribers: mehdi_amini, hans, llvm-commits
Differential Revision: https://reviews.llvm.org/D37909
llvm-svn: 313398
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Summary:
From r303590, ModuleFlagBehavior for PIC and PIE level is changed from
Error to Max. This will cause bitcode compatibility issue when linking
against a bitcode static archive built with old compiler.
Add an auto-ugprade path to upgrade the the ModuleFlagBehavior in the
old bitcode to match the new one so IRLinker can link them.
Reviewers: tejohnson, mehdi_amini, dexonsmith
Reviewed By: dexonsmith
Subscribers: hans, llvm-commits
Differential Revision: https://reviews.llvm.org/D36556
llvm-svn: 311387
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Previous we were issuing an error when linking a module containing
the new Objective-C metadata structure for class properties with an
"old" one.
Now instead we downgrade the module flag so that the Objective-C
runtime does not expect the new metadata structure.
This is consistent with what ld64 is doing on binary files.
Differential Revision: https://reviews.llvm.org/D24620
llvm-svn: 281685
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When we have "Image Info Version" module flag but don't have "Class Properties"
module flag, set "Class Properties" module flag to 0, so we can correctly emit
errors when one module has the flag set and another module does not.
rdar://26469641
llvm-svn: 270791
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