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

MIPS: Introduce basic type feedback for for-in statements to avoid deopts.

Browse Source 
Port r10901 (a54f1a3).

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9586004
Patch from Daniel Kalmar <kalmard@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10985 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
vegorov@chromium.org 2012-03-09 12:30:04 +00:00
parent d46d9a38da
commit 95884b7c6b
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
src/mips/full-codegen-mips.cc
View File

@ -1015,6 +1015,16 @@ void FullCodeGenerator::VisitForInStatement(ForInStatement* stmt) {
// We got a fixed array in register v0. Iterate through that.
Label non_proxy;
__ bind(&fixed_array);
Handle<JSGlobalPropertyCell> cell =
isolate()->factory()->NewJSGlobalPropertyCell(
Handle<Object>(
Smi::FromInt(TypeFeedbackCells::kForInFastCaseMarker)));
RecordTypeFeedbackCell(stmt->PrepareId(), cell);
__ LoadHeapObject(a1, cell);
__ li(a2, Operand(Smi::FromInt(TypeFeedbackCells::kForInSlowCaseMarker)));
__ sw(a2, FieldMemOperand(a1, JSGlobalPropertyCell::kValueOffset));
__ li(a1, Operand(Smi::FromInt(1))); // Smi indicates slow check
__ lw(a2, MemOperand(sp, 0 * kPointerSize)); // Get enumerated object
STATIC_ASSERT(FIRST_JS_PROXY_TYPE == FIRST_SPEC_OBJECT_TYPE);