Subzero: Use a setcc sequence for better icmp lowering.

src/assembler_ia32.cpp

Index: src/assembler_ia32.cpp
diff --git a/src/assembler_ia32.cpp b/src/assembler_ia32.cpp
index b49f63a1ba9410c81d45e5f397dea41e70761f89..eedca918e0d7682ab6175d601ba79282f404a7f4 100644
--- a/src/assembler_ia32.cpp
+++ b/src/assembler_ia32.cpp
@@ -156,6 +156,14 @@ void AssemblerX8632::setcc(CondX86::BrCond condition, ByteRegister dst) {
   EmitUint8(0xC0 + dst);
 }
 
+// TODO(stichnot): Upstream to Dart.
+void AssemblerX8632::setcc(CondX86::BrCond condition, const Address &address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitUint8(0x0F);
+  EmitUint8(0x90 + condition);
+  EmitOperand(0, address);
+}
+
 void AssemblerX8632::mov(Type Ty, GPRRegister dst, const Immediate &imm) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   if (isByteSizedType(Ty)) {