Reapply optimization of DeoptimizeIf for ia32 broken in r13633.

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index 8892142cb1b7411ffbe085ea7ba1a43b2703084d..c3319d9057205a3c25fe60a86d644d052b4fc022 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -896,6 +896,11 @@ void LCodeGen::DeoptimizeIf(Condition cc, LEnvironment* environment) {
     } else {
       __ jmp(entry, RelocInfo::RUNTIME_ENTRY);
     }
+  } else if (!needs_lazy_deopt && frame_is_built_) {
+    // Optimization for ia32 only that skips the indirection through a
+    // jump table entry for conditional deopts if possible.
+    ASSERT(cc != no_condition);
+    __ j(cc, entry, RelocInfo::RUNTIME_ENTRY);
   } else {
     // We often have several deopts to the same entry, reuse the last
     // jump entry if this is the case.