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private symbols in the __DATA segment internal.
This prevents the linker from removing the symbol names. Keeping the
symbols visible enables tools to collect various information about the
symbols, for example, tools that discover whether or not a symbol gets
dirtied.
rdar://problem/48887111
Differential Revision: https://reviews.llvm.org/D61454
llvm-svn: 360359
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works only on intrinsics
Differential Revision: https://reviews.llvm.org/D55802
Reviewers: rjmccall
llvm-svn: 349535
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Clang generates copy and dispose helper functions for each block literal
on the stack. Often these functions are equivalent for different blocks.
This commit makes changes to merge equivalent copy and dispose helper
functions and reduce code size.
To enable merging equivalent copy/dispose functions, the captured object
infomation is encoded into the helper function name. This allows IRGen
to check whether an equivalent helper function has already been emitted
and reuse the function instead of generating a new helper function
whenever a block is defined. In addition, the helper functions are
marked as linkonce_odr to enable merging helper functions that have the
same name across translation units and marked as unnamed_addr to enable
the linker's deduplication pass to merge functions that have different
names but the same content.
rdar://problem/42640608
Differential Revision: https://reviews.llvm.org/D50152
llvm-svn: 339438
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driving a canonical difference between that and an unqualified
type is a really bad idea when both are valid. Instead, remember
that it was there in a non-canonical way, then look for that in
the one place we really care about it: block captures. The net
effect closely resembles the behavior of a decl attribute, except
still closely following ARC's standard qualifier parsing rules.
llvm-svn: 253534
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