Author: [email protected]
Date: Tue Mar 31 08:03:02 2009
New Revision: 1656
Modified:
branches/bleeding_edge/src/codegen-ia32.cc
Log:
Keep the result of postfix increment and decrement in a register.
Review URL: http://codereview.chromium.org/56106
Modified: branches/bleeding_edge/src/codegen-ia32.cc
==============================================================================
--- branches/bleeding_edge/src/codegen-ia32.cc (original)
+++ branches/bleeding_edge/src/codegen-ia32.cc Tue Mar 31 08:03:02 2009
@@ -4799,17 +4799,25 @@
target.size() * kPointerSize);
Result value = frame_->Pop();
- value.ToRegister();
- ASSERT(value.is_valid());
// Postfix: Store the old value as the result.
if (is_postfix) {
- Result old_value = value;
- frame_->SetElementAt(target.size(), &old_value);
+ if (value.is_register()) {
+ Result old_value = allocator_->Allocate();
+ ASSERT(old_value.is_valid());
+ __ mov(old_value.reg(), value.reg());
+ frame_->SetElementAt(target.size(), &old_value);
+ } else {
+ ASSERT(value.is_constant());
+ Result old_value = value;
+ frame_->SetElementAt(target.size(), &old_value);
+ }
}
// Perform optimistic increment/decrement. Ensure the value is
// writable.
+ value.ToRegister();
+ ASSERT(value.is_valid());
frame_->Spill(value.reg());
ASSERT(allocator_->count(value.reg()) == 1);
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