Unbreak non-SSE2 ia32 platforms.

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 4b9a62dbd863bc16aae785f89546119d9e983235..2e5fa56347105e9f97142dae783b058bd4406283 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -4586,7 +4586,13 @@ void LCodeGen::DoDeferredNumberTagI(LInstruction* instr,
       CpuFeatures::Scope feature_scope(SSE2);
       __ LoadUint32(xmm0, reg, xmm1);
     } else {
-      UNREACHABLE();
+      // There's no fild variant for unsigned values, so zero-extend to a 64-bit
+      // int manually.
+      __ push(Immediate(0));
+      __ push(reg);
+      __ fild_d(Operand(esp, 0));
+      __ pop(reg);
+      __ pop(reg);
     }
   }
 
@@ -4638,10 +4644,10 @@ void LCodeGen::DoNumberTagD(LNumberTagD* instr) {
   };
 
   Register reg = ToRegister(instr->result());
-  Register tmp = ToRegister(instr->temp());
 
   DeferredNumberTagD* deferred = new(zone()) DeferredNumberTagD(this, instr);
   if (FLAG_inline_new) {
+    Register tmp = ToRegister(instr->temp());
     __ AllocateHeapNumber(reg, tmp, no_reg, deferred->entry());
   } else {
     __ jmp(deferred->entry());