X64: Always use rax as left register from DoInstanceOfKnownGlobal.

On IA32 we use InstanceofStub::left(), but on x64 we have just used rax and rdx directly. This fixes the assertion crashes on x64 crankshaft.

Review URL: http://codereview.chromium.org/6596101

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7010 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index 59c0935..f0ab11e 100644 (file)
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -1158,7 +1158,7 @@ LInstruction* LChunkBuilder::DoInstanceOf(HInstanceOf* instr) {
 LInstruction* LChunkBuilder::DoInstanceOfKnownGlobal(
     HInstanceOfKnownGlobal* instr) {
   LInstanceOfKnownGlobal* result =
-      new LInstanceOfKnownGlobal(UseRegisterAtStart(instr->value()));
+      new LInstanceOfKnownGlobal(UseFixed(instr->value(), rax));
   return MarkAsCall(DefineFixed(result, rax), instr);
 }