Instead of using RawObject* as keys, use Object*. Using handles eliminates any assumption
about the underlying GC implementation (e.g. requiring that old objects don't move).
Remove special handling of null_object by making HashMap more generic and
allowing the trait to specify the value used to indicate an empty element.
The goal is to use one unified, efficient implementation of the constant
pool on all architectures that require one (x64, arm64, mips).
R=vegorov@google.com, zra@google.com
Review URL: https://codereview.chromium.org//848703002
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@42901 260f80e4-7a28-3924-810f-c04153c831b5
Original CL: http://codereview.chromium.org/10872035/
It enables elimination of redundant expressions across
basic blocks.
Currently used for smi checks and class checks, but will
be extended to other expressions in a separate CL.
Additionally, this fixes a bug in the register allocator where
a blocked register was illegally assigned to an unallocated live range.
It also fixes a Mac compiler issue with the constructor of
DirectChainedHashMap.
Review URL: https://chromiumcodereview.appspot.com//10871060
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@11302 260f80e4-7a28-3924-810f-c04153c831b5
This CL contains:
A new CheckClassComp instruction. Currently it is used only for instance loads:
(LoadInstanceFieldComp)
A pass LocalCSE that performs block-local common subexpression elimination. To identify
redundant expressions I use a hash map per basic block. Computations that do not have
side effects can participate in CSE. For now, I only enabled it for CheckClass.
Any computation that participates in CSE must implement the AttributesEqual function.
Other smaller fixes:
Places where we can pass the correct initial size for GrowableArrays
that have a known size. We should consider having a FixedLengthArray for this purpose.
Made the accessors ic_data() and set_ic_data() use a const ICData*.
Review URL: https://chromiumcodereview.appspot.com//10824349
git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@10948 260f80e4-7a28-3924-810f-c04153c831b5
fschneider@google.com