6703dddac4
Only JSObject enumerables with enum cache (fast case properties, no interceptors, no enumerable properties on the prototype) are supported. HLoadKeyedGeneric with keys produced by for-in enumeration are recognized and rewritten into direct property load by index. For this enum-cache was extended to store property indices in a separate array (see handles.cc). New hydrogen instructions: - HForInPrepareMap: checks for-in fast case preconditions and returns map that contains enum-cache; - HForInCacheArray: extracts enum-cache array from the map; - HCheckMapValue: map check with HValue map instead of immediate; - HLoadFieldByIndex: load fast property by it's index, positive indexes denote in-object properties, negative - out of object properties; Changed hydrogen instructions: - HLoadKeyedFastElement: added hole check suppression for loads from internal FixedArrays that are knows to have no holes inside. R=fschneider@chromium.org BUG= TEST= Review URL: https://chromiumcodereview.appspot.com/9425045 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10794 ce2b1a6d-e550-0410-aec6-3dcde31c8c00 |
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| benchmarks | ||
| build | ||
| include | ||
| preparser | ||
| samples | ||
| src | ||
| test | ||
| tools | ||
| .gitignore | ||
| AUTHORS | ||
| ChangeLog | ||
| LICENSE | ||
| LICENSE.strongtalk | ||
| LICENSE.v8 | ||
| LICENSE.valgrind | ||
| Makefile | ||
| SConstruct | ||