runtime/vm/intermediate_language_x64.cc - Issue 157833004: Disable hoisting CheckClass due to excessive deoptimization.

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Unified Diff: runtime/vm/intermediate_language_x64.cc

Issue 157833004: Disable hoisting CheckClass due to excessive deoptimization. (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/

Patch Set: Created 6 years, 10 months ago

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Index: runtime/vm/intermediate_language_x64.cc

===================================================================

--- runtime/vm/intermediate_language_x64.cc (revision 32457)

+++ runtime/vm/intermediate_language_x64.cc (working copy)

@@ -4587,9 +4587,10 @@

void CheckClassInstr::EmitNativeCode(FlowGraphCompiler* compiler) {

+ const DeoptReasonId deopt_reason =

+ licm_hoisted_ ? kDeoptHoistedCheckClass : kDeoptCheckClass;

if (IsNullCheck()) {

- Label* deopt = compiler->AddDeoptStub(deopt_id(),

- kDeoptCheckClass);

+ Label* deopt = compiler->AddDeoptStub(deopt_id(), deopt_reason);

__ CompareObject(locs()->in(0).reg(),

Object::null_object(), PP);

__ j(EQUAL, deopt);

@@ -4600,8 +4601,7 @@

(unary_checks().NumberOfChecks() > 1));

- Label* deopt = compiler->AddDeoptStub(deopt_id(),

- kDeoptCheckClass);

+ Label* deopt = compiler->AddDeoptStub(deopt_id(), deopt_reason);

Label is_ok;

intptr_t cix = 0;

if (unary_checks().GetReceiverClassIdAt(cix) == kSmiCid) {

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