Implement inlining of instanceof tests on ARM.

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index 533d32c747427cb9ee3a9aad1d3fb54af98c3b62..2ef4501258fd473c643dd668eaf48168a2ac7d37 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -1337,7 +1337,18 @@ void LCodeGen::DoCmpMapAndBranch(LCmpMapAndBranch* instr) {
 
 
 void LCodeGen::DoInstanceOf(LInstanceOf* instr) {
-  Abort("DoInstanceOf unimplemented.");
+  // we expect object and function in registers r1 and r0.

[Søren Thygesen Gjesse, 2010/12/20 13:07:10]

Please start comment with uppercase letter.

[Karl Klose, 2010/12/21 08:56:37]

Done.

+  InstanceofStub stub(InstanceofStub::kArgsInRegisters);
+  CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);
+
+  Label true_value, done;
+  __ tst(r0, r0);

[Søren Thygesen Gjesse, 2010/12/20 13:07:10]

I think this can be done with conditional moves and no branching.

[Karl Klose, 2010/12/21 08:56:37]

Done.

+  __ b(eq, &true_value);
+  __ mov(r0, Operand(Factory::false_value()));
+  __ b(&done);
+  __ bind(&true_value);
+  __ mov(r0, Operand(Factory::true_value()));
+  __  bind(&done);
 }