Truffle:  revise instrumentation support APIs in ExecutionContext
rename initializeBytecode to getBytecode and eliminate extra copy
minor cleanups
mx: fixed incorrect test for subprocess being alive
HSAIL: fix for -UseHSAILDeoptimization
Contributed-by: Eric Caspole <eric.caspole@amd.com>
make FixedNodeProbabilityCache behave better in the presence of dead code
fix bug in ConditionalEliminationPhase that loses the connection from guard to checkcast PiNode
skip PiNode in AMD64HotSpotNodeLIRBuilder.filterCompression
small cleanup in LinearScan
preserve context in Debug.forceLog
put LoopSafepointEliminationPhase into an IncrementalCanonicalizerPhase
only canonicalize CustomizedUnsafeLoadFinalNode if the condition is constant