Reviewed-by: kamg, dsamersoff

Summary: Call collect_stack_roots() before collect_simple_roots() as an optimization.
Reviewed-by: ysr, dsamersoff, dcubed
Contributed-by: ashok.srinivasa.murthy@oracle.com

Summary: VM_HeapWalkOperation::doit() should only reset mark bits when necessary.
Reviewed-by: dsamersoff, ysr, dholmes, dcubed
Contributed-by: ashok.srinivasa.murthy@oracle.com

Reviewed-by: twisti, kvn, jrose

Reviewed-by: iveresov, never

Reviewed-by: never, twisti

Summary: Mark all associated (same box and obj) lock and unlock nodes for elimination if some of them marked already.
Reviewed-by: iveresov, never

Reviewed-by: kvn, jrose

Reviewed-by: kvn, jrose

Summary: Removed extra change from another bug fix that caused this regression
Reviewed-by: phh, dcubed, kvn, kamg, never

Summary: change the default setting of the flag AllowInvokeGeneric to false
Reviewed-by: never

7049415: Failure of resolution of sym.reference to the c.s.s. should be wrapped in BootstrapMethodError
Summary: Delegate invokedynamic linkage errors to MethodHandleNatives.raiseException.
Reviewed-by: never

Summary: optimize cmp_ne(xor(X,1),0) to cmp_eq(X,0) only for boolean values X.
Reviewed-by: never

Summary: Fix initialization of a newly-allocated array with arraycopy
Reviewed-by: never

Reviewed-by: kvn, jrose

Summary: Save and restore the argument registers around the call to checkcast_arraycopy
Reviewed-by: never, roland

Summary: Use ins_encode %{ %} form to encode cadd_cmpLTMask() instruction and remove unused code.
Reviewed-by: never

Reviewed-by: kvn, iveresov, jrose

Summary: ciObject::can_be_constant() and should_be_constant() should use is_perm() instead of !is_scavengable()
Reviewed-by: never, jrose

Summary: Fixed invalid casts in address computation
Reviewed-by: kvn, never
Contributed-by: thomas.salter@unisys.com

Summary: The code incorrectly used is_instptr() instead of is_oopptr() to get const_oop.
Reviewed-by: never

Summary: Do a one-step look-ahead, when sweeping free or garbage blocks, to avoid overstepping sweep limit, which may become a non-block-boundary because of a heap expansion delta coalescing with a previously co-terminal free block.
Reviewed-by: brutisso, tonyp

Summary: Unrewrite bytecodes for OOM error allocating the constant pool cache.
Reviewed-by: dcubed, acorn, never

Summary: Replace the assert in PhiNode::Ideal with check to avoid transformation of new phi.
Reviewed-by: never

Summary: New limit for unrolled loop should be set only for zero trip guard and loop iteration test.
Reviewed-by: never

Summary: Missing fail flag set in strings concatenation code.
Reviewed-by: never

Summary: Update the HS21 build number to 14
Reviewed-by: jcoomes