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textual format
The 3-field form was introduced by D3499 in 2014 and the legacy 2-field
form was planned to be removed in LLVM 4.0
For the textual format, this patch migrates the existing 2-field form to
use the 3-field form and deletes the compatibility code.
test/Verifier/global-ctors-2.ll checks we have a friendly error message.
For bitcode, lib/IR/AutoUpgrade UpgradeGlobalVariables will upgrade the
2-field form (add i8* null as the third field).
Reviewed By: rnk, dexonsmith
Differential Revision: https://reviews.llvm.org/D61547
llvm-svn: 360742
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llvm-svn: 216022
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An optional third field was added to `llvm.global_ctors` (and
`llvm.global_dtors`) in r209015. Most of the code has been changed to
deal with both versions of the variables. Users of the C API might
create either version, the helper functions in LLVM create the two-field
version, and clang now creates the three-field version.
However, the BitcodeReader was changed to always upgrade to the
three-field version. This created an unnecessary inconsistency in the
IR before/after serializing to bitcode.
This commit resolves the inconsistency by making the third field truly
optional (and not upgrading in the bitcode reader). Since `llvm-link`
was relying on this upgrade code, rather than deleting it I've moved it
into `ModuleLinker`, where it upgrades these arrays as necessary to
resolve inconsistencies between modules.
The ideal resolution would be to remove the 2-field version and make the
third field required. I filed PR20506 to track that.
I changed `test/Bitcode/upgrade-global-ctors.ll` to a negative test and
duplicated the `llvm-link` check in `test/Linker/global_ctors.ll` to
check both upgrade directions.
Since I came across this as part of PR5680 (serializing use-list order),
I've also added the missing `verify-uselistorder` RUN line to
`test/Bitcode/metadata-2.ll`.
llvm-svn: 215457
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Change the default for `-num-shuffles` to 5 and better document the
algorithm in the header docs of `verify-uselistorder`.
llvm-svn: 214419
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llvm-svn: 214318
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Fix the sort of expected order in the reader to correctly return `false`
when comparing a `Use` against itself.
This was caught by test/Bitcode/binaryIntInstructions.3.2.ll, so I'm
adding a `RUN` line using `llvm-uselistorder` for every test in
`test/Bitcode` that passes.
A few tests still fail, so I'll investigate those next.
This is part of PR5680.
llvm-svn: 214157
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llvm-svn: 209075
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