Remove interior mutability in mir predecessors cache#64736

Merged

bors merged 47 commits intorust-lang:masterfrom Nashenas88:mir_predecessors_cache_cleanup

Dec 2, 2019

Commits on Dec 2, 2019

Remove interior mutability in mir predecessors cache
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Inline cache impl into Body, rename predecessor fns, change output of predecessors_for to slice
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Get rid of old comment
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Stop invalidating predecessors cache when accessing unique basic block, invalidate cache when accessing unique terminator
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Add pass to ensure predecessors cache is generated after optimization
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Fix Mir visitor macro to ensure it calls the proper method to invalidate the predecessors cache
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Address linting errors caught by CI
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Ensure predecessors are recomputed at critical points, fixes panics
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Move predecessors cache invalidation back to basic_blocks_mut, add a couple more ensure_predecessors to prevent panics
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Address excessive line length that was triggering warning during linting
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Address nits and remove unneeded pass
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Add back cache invalidation to basic_blocks_and_local_decls_mut
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Move predecessors cache back to its own type
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Move predecessor cache outside of Body, use wrapper types to manage Cache and Body (WIP, amend this commit)
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Simplify Cache wrapper to single type, impl Deref on it, fix all compilation errors in librustc_codegen_ssa
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Remove Body from FunctionCx, pass it along during librustc_codegen_ssa
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Improved BodyCache body impl so it only returns a sharable ref, add new body_mut method, fix visit macros, simplify usage in codegen_ssa analyzer
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Add Body back as field of FunctionCx, but under a different lifetime
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Revert back to using FunctionCx's Body
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Convert &mut to & since the reference didn't need to be mutable
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Account for new maybe_sideeffect helper that requires predecessors
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Fix a large number of Body -> (ReadOnly)BodyCache type errors, add predecessor_locations fn to ReadOnlyBodyCache
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Add read_only fn to BodyCache<&mut...> impl, fix more Body -> (ReadOnly)BodyCache type errors
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Add predecessors fn to ReadOnlyBodyCache, fix more Body -> (ReadOnly)BodyCache type errors
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Fix typo caused by rebasing
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Fix remaining Body -> (ReadOnly)BodyCache type errors in librustc_mir outside of librustc_mir/transform
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Simplify BodyCache impl and fix all remaining type errors in librustc_mir (lifetime errors still exist)
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Fix remaining compilation issues
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Fix typos caused during rebase
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Fix tidy errors
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Fix typo
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Fix compilation errors created during rebase
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Undo minor changes that weren't needed, fix one lifetime typo
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Remove BodyCache.body and rely on Deref as much as possible for ReadOnlyBodyCache
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Remove HasLocalDecls impl from BodyCache's, properly reborrow to Body, rename all body_cache back to body
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Fix typos caused during rebase
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Remove files created during conflict resolution
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Compute predecessors in mir_build query and use existing cache for generating ReadOnlyBodyCache, remove unneeded fns
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Fix type errors cause during rebasing
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Remove inline attributes that hadn't been profiled, unexport Cache since it no longer needs to be public
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Remove unchecked inline attribute, remove unused functions, make chache mod private again
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Fix type errors created during rebasing
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Fix rebasing errors, convert some BodyCache::body() calls to reborrows
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Fix tidy issues
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Use new HashStable proc macro
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Fix issues caused during rebasing
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Fix issues caused during rebasing
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