Allow configuring to use llvm-root with 3.0, 3.0svn, 3.1, 3.1svn #2985
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I was under the impression that we made use of a custom branch of LLVM. If we don't now, we soon will with the upcoming work on adding support for tracing (though that will get merged back someday). @brson / @graydon / @pcwalton can you confirm? in that case, does it make sense to allow support for normal LLVM installations? |
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As far as I know, the Rust branch of LLVM only has small changes to instructions for garbage collection. At least it compiles and works perfectly with an official version of LLVM. I didn't know that the branch would be getting new stuff. |
ghost
assigned 
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I'll take this. |
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Merged as of de5c15e |
RalfJung
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Jul 23, 2023
make full field retagging the default The 'scalar' field retagging mode is clearly a hack -- it mirrors details of the codegen backend and how various structs are represented in LLVM. This means whether code has UB or not depends on surprising aspects, such as whether a struct has 2 or 3 (non-zero-sized) fields. Now that both hashbrown and scopeguard have released fixes to be compatible with field retagging, I think it is time to enable full field retagging by default. `@saethlin` do you have an idea of how much fallout enabling full field retagging by default will cause? Do you have objections to enabling it by default? Fixes rust-lang/miri#2528
celinval
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Jun 4, 2024
Previously, the code assumed that all metrics of the benchmark results would be 'declared' in the "metrics" key of the parser output. This commit ensures that if a parser emits a benchmark containing a metric that hasn't been declared in the "metrics" key, that result is ignored and benchcomp does not crash.
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This is a few patches that allows using
llvm-rootwith SVN and stable releases. This allows people to use a globally installed LLVM, which didn't work before because of the following reasons:llvm-rootdidn't accept the straight 3.1 and 3.0 releases. I've changed the configure script to allow 3.0, 3.0svn, 3.1 and 3.1svn. I'm not sure if 3.0 actually even works, but I just assumed it did because of the error message that was already there.RustWrapper.ccwas initializing all targets whereasrustllvm.def.inwas only linking to X86 (including X86_64) because that's all Rust supports generating machine code for. I've changedRustWrapper.ccto only initialize the targets that Rust currently actually supports.I am not entirely sure of the status of ARM in Rust (I see a few mentions of it in the source code), so I'm not sure whether that should be initialized / linked in as well (it is currently not linked into in
rustllvm.def.in). Another thing isrustllvm.def.inhas repeated mentions of the X86 initialization functions, I'm not sure whether that is intentional or not.