swift234

Optimize compilation time for RLE and DSE with respective
to the new projection path. We do not need to trace from the accessed field
to the base object when we've done it before in enumerateLSLOcations

Stdlib -O

=== Before ===

Running Time        Self (ms)           Symbol Name
25137.0ms   37.3%   0.0         swift::runSILOptimizationPasses(swift::SILModule&)
24939.0ms   37.0%   0.0         swift::SILPassManager::runOneIteration()
20226.0ms   30.0%   29.0        swift::SILPassManager::runFunctionPasses(llvm::ArrayRef<swift::SILFunctionTransform*>)
19241.0ms   28.5%   83.0        swift::SILPassManager::runPassesOnFunction(llvm::ArrayRef<swift::SILFunctionTransform*>, swift::SILFunction*)
3214.0ms    4.7%    10.0        (anonymous namespace)::SimplifyCFGPass::run()
3005.0ms    4.4%    14.0        (anonymous namespace)::ARCSequenceOpts::run()
2438.0ms    3.6%    7.0         (anonymous namespace)::SILCombine::run()
2217.0ms    3.2%    54.0        (anonymous namespace)::RedundantLoadElimination::run()
2212.0ms    3.2%    131.0       (anonymous namespace)::SILCSE::run()
1195.0ms    1.7%    11.0        (anonymous namespace)::GenericSpecializer::run()
1168.0ms    1.7%    39.0        (anonymous namespace)::DeadStoreElimination::run()
853.0ms    1.2%     150.0               (anonymous namespace)::DCE::run()
499.0ms    0.7%     7.0                 (anonymous namespace)::SILCodeMotion::run()

=== After ===

Running Time    Self (ms)               Symbol Name
22955.0ms   38.2%       0.0       swift::runSILOptimizationPasses(swift::SILModule&)
22777.0ms   37.9%       0.0       swift::SILPassManager::runOneIteration()
18447.0ms   30.7%       30.0      swift::SILPassManager::runFunctionPasses(llvm::ArrayRef<swift::SILFunctionTransform*>)
17510.0ms   29.1%       67.0      swift::SILPassManager::runPassesOnFunction(llvm::ArrayRef<swift::SILFunctionTransform*>, swift::SILFunction*)
2944.0ms    4.9%        5.0       (anonymous namespace)::SimplifyCFGPass::run()
2884.0ms    4.8%        12.0      (anonymous namespace)::ARCSequenceOpts::run()
2277.0ms    3.7%        1.0       (anonymous namespace)::SILCombine::run()
1951.0ms    3.2%        117.0     (anonymous namespace)::SILCSE::run()
1803.0ms    3.0%        54.0      (anonymous namespace)::RedundantLoadElimination::run()
1096.0ms    1.8%        10.0      (anonymous namespace)::GenericSpecializer::run()
911.0ms    1.5% 53.0              (anonymous namespace)::DeadStoreElimination::run()
795.0ms    1.3% 135.0             (anonymous namespace)::DCE::run()
453.0ms    0.7% 9.0               (anonymous namespace)::SILCodeMotion::run()