AuroraMiddleware/v8
1
0
Fork 0
Code Issues 2 Pull Requests Releases Wiki Activity

[turbofan] Allocation-free string to double conversion

Browse Source 
Bug: v8:7790
Change-Id: Ib5fe2727e52a62931cb1bd5ae84fa423a9f6c670
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2071262
Reviewed-by: Georg Neis <neis@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Nico Hartmann <nicohartmann@chromium.org>
Cr-Commit-Position: refs/heads/master@{#66464}
This commit is contained in:
Nico Hartmann 2020-02-25 14:58:28 +01:00 committed by Commit Bot
parent bf20d7d1d3
commit a6cea204df
1 changed files with 5 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
src/compiler/js-heap-broker.cc
View File

@ -828,9 +828,12 @@ StringData::StringData(JSHeapBroker* broker, ObjectData** storage,
is_external_string_(object->IsExternalString()),
is_seq_string_(object->IsSeqString()),
chars_as_strings_(broker->zone()) {
int flags = ALLOW_HEX | ALLOW_OCTAL | ALLOW_BINARY;
if (length_ <= kMaxLengthForDoubleConversion) {
to_number_ = StringToDouble(broker->isolate(), object, flags);
const int flags = ALLOW_HEX | ALLOW_OCTAL | ALLOW_BINARY;
uc16 buffer[kMaxLengthForDoubleConversion];
String::WriteToFlat(*object, buffer, 0, length_);
Vector<const uc16> v(buffer, length_);
to_number_ = StringToDouble(v, flags);
}
}