[llvm] Enable optimizations for LLVM 9 JIT. #34555
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Share more code between LLVM 6 and LLVM 9. Mangler::getNameWithPrefix takes a Twine, not a std::string, so use a StringRef to avoid an unnecessary allocation. InstructionCombiningPass grew a dependency on ProfileSummaryInfoWrapperPass in dotnet/llvm-project@09e539f, which depends on the enclosing FunctionPassManager having a valid reference to a module. This commit adds a dummy module to satisfy this, instead of recreating a new FunctionPassManager on every compilation. (See also http://lists.llvm.org/pipermail/llvm-dev/2019-March/130690.html.)
EgorBo
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Apr 5, 2020
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!! This PR is a copy of mono/mono#19445, please do not edit or review it in this repo !!
Do not automatically approve this PR:
* Consider how the changes affect configurations in this repo,
* Check effects on files that are not mirrored,
* Identify test cases that may be needed in this repo.
!! Merge the PR only after the original PR is merged !!
Share more code between LLVM 6 and LLVM 9.
Mangler::getNameWithPrefix takes a Twine, not a std::string, so use a
StringRef to avoid an unnecessary allocation.
InstructionCombiningPass grew a dependency on
ProfileSummaryInfoWrapperPass in
dotnet/llvm-project@09e539f,
which depends on the enclosing FunctionPassManager having a valid
reference to a module. This commit adds a dummy module to satisfy this,
instead of recreating a new FunctionPassManager on every compilation.
(See also
http://lists.llvm.org/pipermail/llvm-dev/2019-March/130690.html.)