Fix warnings about tautological compares by recent Clang versions.

src/ia32/assembler-ia32.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
 // are met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 1483 matching lines @@
 void Assembler::jmp(Handle<Code> code, RelocInfo::Mode rmode) {
   EnsureSpace ensure_space(this);
   ASSERT(RelocInfo::IsCodeTarget(rmode));
   EMIT(0xE9);
   emit(reinterpret_cast<intptr_t>(code.location()), rmode);
 }
 
 
 void Assembler::j(Condition cc, Label* L, Label::Distance distance) {
   EnsureSpace ensure_space(this);
-  ASSERT(0 <= cc && cc < 16);
+  ASSERT(0 <= cc && static_cast<int>(cc) < 16);
   if (L->is_bound()) {
     const int short_size = 2;
     const int long_size  = 6;
     int offs = L->pos() - pc_offset();
     ASSERT(offs <= 0);
     if (is_int8(offs - short_size)) {
       // 0111 tttn #8-bit disp
       EMIT(0x70 | cc);
       EMIT((offs - short_size) & 0xFF);
     } else {
@@ skipping 11 matching lines @@
     //       is the same however, seems to be rather unlikely case.
     EMIT(0x0F);
     EMIT(0x80 | cc);
     emit_disp(L, Displacement::OTHER);
   }
 }
 
 
 void Assembler::j(Condition cc, byte* entry, RelocInfo::Mode rmode) {
   EnsureSpace ensure_space(this);
-  ASSERT((0 <= cc) && (cc < 16));
+  ASSERT((0 <= cc) && (static_cast<int>(cc) < 16));
   // 0000 1111 1000 tttn #32-bit disp.
   EMIT(0x0F);
   EMIT(0x80 | cc);
   emit(entry - (pc_ + sizeof(int32_t)), rmode);
 }
 
 
 void Assembler::j(Condition cc, Handle<Code> code) {
   EnsureSpace ensure_space(this);
   // 0000 1111 1000 tttn #32-bit disp
@@ skipping 1099 matching lines @@
     fprintf(coverage_log, "%s\n", file_line);
     fflush(coverage_log);
   }
 }
 
 #endif
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32