Allow uint32 value on optimized frames if they are consumed by safe operations.

src/ia32/macro-assembler-ia32.cc

Index: src/ia32/macro-assembler-ia32.cc
diff --git a/src/ia32/macro-assembler-ia32.cc b/src/ia32/macro-assembler-ia32.cc
index 7d621a34fd972d767ab7f154fb1f994f8c153f76..422e966c0b844a8b548496b6ccb3cf5ff7b5f58d 100644
--- a/src/ia32/macro-assembler-ia32.cc
+++ b/src/ia32/macro-assembler-ia32.cc
@@ -155,6 +155,24 @@ void MacroAssembler::ClampUint8(Register reg) {
 }
 
 
+static double kUint32Bias =
+    static_cast<double>(static_cast<uint32_t>(0xFFFFFFFF)) + 1;
+
+
+void MacroAssembler::LoadUint32(XMMRegister dst,
+                                Register src,
+                                XMMRegister scratch) {
+  Label done;
+  cmp(src, Immediate(0));
+  movdbl(scratch,
+         Operand(reinterpret_cast<int32_t>(&kUint32Bias), RelocInfo::NONE));
+  cvtsi2sd(dst, src);
+  j(not_sign, &done, Label::kNear);
+  addsd(dst, scratch);
+  bind(&done);
+}
+
+
 void MacroAssembler::RecordWriteArray(Register object,
                                       Register value,
                                       Register index,