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LSE does load removal in the end in order to maintain the validity of
all the heap locations collected in the first pass. We should however
proactively retrieve a removed load's substitute as its value. This
simplifies the handling of substitutes by making sure the substitute
itself has no substitute. It also enables some additional optimizations
by using the true heap value for merging/same-value test, etc.
Test: run-test on host.
Change-Id: I26d97e7794d80a141ab02bf446dd07656f5cde1d
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Allow array store/allocation elimination if it's only accessed
by constant index, so that there is no index-aliasing.
Bug: 35634932
Test: m -j20 test-art-host-run-test
Change-Id: Ief6e27f5bdbb30988ff4f318a34b4251c93865fa
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This reverts commit 8030c4100d2586fac39ed4007c61ee91d4ea4f25.
Change-Id: I79558d85484be5f5d04e4a44bea7201fece440f0
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Breaks libcore tests:
libcore.java.lang.ref.FinalizeTest#testWatchdogDoesNotFailForObjectsThatAreNearTheDeadline
libcore.java.util.ResourceLeakageDetectorTest#testDetectsUnclosedCloseGuard
org.apache.harmony.tests.java.lang.ref.ReferenceTest#test_finalizeReferenceInteraction
This reverts commit 589dac7f0ce078d19aad7e35bb0195c47ddf01d2.
Change-Id: I55115765c10762d5bc152d3425e4622560d8b9f4
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This adds a pass to eliminate some unnecessary heap loads/stores. It
first collects heap locations and then tracks values stored to those heap
locations. Alias analysis is done based on offset, type, singleton,
pre-existence, etc.
Change-Id: I11a9d8ef20d1b2f245607eb25118e9aff9be472a
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Change-Id: I8b57dafcd321c9afa1bbfc6a0674cbea15cbf10c
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