Reviewers: Sven Panne,
Description:
Reland "Allow inlining of functions containing %_ArgumentsLength."
The layout test failures were unrelated to this change.
[email protected]
Please review this at https://codereview.chromium.org/355993002/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files (+13, -11 lines):
M src/ast.cc
M src/hydrogen.cc
Index: src/ast.cc
diff --git a/src/ast.cc b/src/ast.cc
index
53d27999ea073768fd0f879121cddf7964974732..bf16b9c076b8786ce1cb4a2eecf4963f79d70fe9
100644
--- a/src/ast.cc
+++ b/src/ast.cc
@@ -1117,11 +1117,9 @@ void
AstConstructionVisitor::VisitCallRuntime(CallRuntime* node) {
// optimize them.
add_flag(kDontInline);
} else if (node->function()->intrinsic_type == Runtime::INLINE &&
- (node->raw_name()->IsOneByteEqualTo("_ArgumentsLength") ||
- node->raw_name()->IsOneByteEqualTo("_Arguments"))) {
- // Don't inline the %_ArgumentsLength or %_Arguments because their
- // implementation will not work. There is no stack frame to get them
- // from.
+ node->raw_name()->IsOneByteEqualTo("_Arguments")) {
+ // Don't inline the %_Arguments because it's implementation will not
work.
+ // There is no stack frame to get them from.
add_flag(kDontInline);
}
}
Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index
6ae1466d62de54427cc9992af757099705339594..d447bbc9f76cbcb6d16990ed22233d11b154e1d1
100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -11310,13 +11310,17 @@ void
HOptimizedGraphBuilder::GenerateIsConstructCall(CallRuntime* call) {
// Support for arguments.length and arguments[?].
void HOptimizedGraphBuilder::GenerateArgumentsLength(CallRuntime* call) {
- // Our implementation of arguments (based on this stack frame or an
- // adapter below it) does not work for inlined functions. This runtime
- // function is blacklisted by AstNode::IsInlineable.
- ASSERT(function_state()->outer() == NULL);
ASSERT(call->arguments()->length() == 0);
- HInstruction* elements = Add<HArgumentsElements>(false);
- HArgumentsLength* result = New<HArgumentsLength>(elements);
+ HInstruction* result = NULL;
+ if (function_state()->outer() == NULL) {
+ HInstruction* elements = Add<HArgumentsElements>(false);
+ result = New<HArgumentsLength>(elements);
+ } else {
+ // Number of arguments without receiver.
+ int argument_count = environment()->
+ arguments_environment()->parameter_count() - 1;
+ result = New<HConstant>(argument_count);
+ }
return ast_context()->ReturnInstruction(result, call->id());
}
--
--
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