Version 3.22.2
Performance and stability improvements on all platforms.
git-svn-id: http://v8.googlecode.com/svn/trunk@16953 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/src/full-codegen.cc b/src/full-codegen.cc
index f1877fb..c4ae1d7 100644
--- a/src/full-codegen.cc
+++ b/src/full-codegen.cc
@@ -1618,8 +1618,7 @@
void BackEdgeTable::Patch(Isolate* isolate,
Code* unoptimized) {
DisallowHeapAllocation no_gc;
- Code* replacement_code =
- isolate->builtins()->builtin(Builtins::kOnStackReplacement);
+ Code* patch = isolate->builtins()->builtin(Builtins::kOnStackReplacement);
// Iterate over the back edge table and patch every interrupt
// call to an unconditional call to the replacement code.
@@ -1631,7 +1630,7 @@
ASSERT_EQ(INTERRUPT, GetBackEdgeState(isolate,
unoptimized,
back_edges.pc(i)));
- PatchAt(unoptimized, back_edges.pc(i), replacement_code);
+ PatchAt(unoptimized, back_edges.pc(i), ON_STACK_REPLACEMENT, patch);
}
}
@@ -1643,8 +1642,7 @@
void BackEdgeTable::Revert(Isolate* isolate,
Code* unoptimized) {
DisallowHeapAllocation no_gc;
- Code* interrupt_code =
- isolate->builtins()->builtin(Builtins::kInterruptCheck);
+ Code* patch = isolate->builtins()->builtin(Builtins::kInterruptCheck);
// Iterate over the back edge table and revert the patched interrupt calls.
ASSERT(unoptimized->back_edges_patched_for_osr());
@@ -1653,10 +1651,10 @@
BackEdgeTable back_edges(unoptimized, &no_gc);
for (uint32_t i = 0; i < back_edges.length(); i++) {
if (static_cast<int>(back_edges.loop_depth(i)) <= loop_nesting_level) {
- ASSERT_EQ(ON_STACK_REPLACEMENT, GetBackEdgeState(isolate,
- unoptimized,
- back_edges.pc(i)));
- RevertAt(unoptimized, back_edges.pc(i), interrupt_code);
+ ASSERT_NE(INTERRUPT, GetBackEdgeState(isolate,
+ unoptimized,
+ back_edges.pc(i)));
+ PatchAt(unoptimized, back_edges.pc(i), INTERRUPT, patch);
}
}
@@ -1667,6 +1665,29 @@
}
+void BackEdgeTable::AddStackCheck(CompilationInfo* info) {
+ DisallowHeapAllocation no_gc;
+ Isolate* isolate = info->isolate();
+ Code* code = info->shared_info()->code();
+ Address pc = code->instruction_start() + info->osr_pc_offset();
+ ASSERT_EQ(ON_STACK_REPLACEMENT, GetBackEdgeState(isolate, code, pc));
+ Code* patch = isolate->builtins()->builtin(Builtins::kOsrAfterStackCheck);
+ PatchAt(code, pc, OSR_AFTER_STACK_CHECK, patch);
+}
+
+
+void BackEdgeTable::RemoveStackCheck(CompilationInfo* info) {
+ DisallowHeapAllocation no_gc;
+ Isolate* isolate = info->isolate();
+ Code* code = info->shared_info()->code();
+ Address pc = code->instruction_start() + info->osr_pc_offset();
+ if (GetBackEdgeState(isolate, code, pc) == OSR_AFTER_STACK_CHECK) {
+ Code* patch = isolate->builtins()->builtin(Builtins::kOnStackReplacement);
+ PatchAt(code, pc, ON_STACK_REPLACEMENT, patch);
+ }
+}
+
+
#ifdef DEBUG
bool BackEdgeTable::Verify(Isolate* isolate,
Code* unoptimized,