[turbofan] Fix more -Wsign-compare warnings.

test/cctest/test-assembler-arm.cc

 // Copyright 2012 the V8 project authors. 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.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1800 matching lines @@
 #endif
   F3 f = FUNCTION_CAST<F3>(code->entry());
   for (size_t i = 0; i < 128; ++i) {
     int32_t r, x = rng->NextInt(), y = rng->NextInt();
     Object* dummy = CALL_GENERATED_CODE(isolate, f, &r, x, y, 0, 0);
     CHECK_EQ(static_cast<int32_t>(static_cast<uint16_t>(x)) + y, r);
     USE(dummy);
   }
 }
 
-
 #define TEST_RBIT(expected_, input_)                       \
   t.input = input_;                                        \
   t.result = 0;                                            \
   dummy = CALL_GENERATED_CODE(isolate, f, &t, 0, 0, 0, 0); \
-  CHECK_EQ(expected_, t.result);
-
+  CHECK_EQ(static_cast<uint32_t>(expected_), t.result);
 
 TEST(rbit) {
   CcTest::InitializeVM();
   Isolate* const isolate = CcTest::i_isolate();
   HandleScope scope(isolate);
   Assembler assm(isolate, nullptr, 0);
 
   if (CpuFeatures::IsSupported(ARMv7)) {
     CpuFeatureScope scope(&assm, ARMv7);
 
@@ skipping 963 matching lines @@
   F4 f = FUNCTION_CAST<F4>(code->entry());
 
   Object* dummy = nullptr;
   USE(dummy);
 
 #ifndef V8_TARGET_LITTLE_ENDIAN
 #error This test assumes a little-endian layout.
 #endif
   uint64_t data = UINT64_C(0x84838281807f7e7d);
   dummy = CALL_GENERATED_CODE(isolate, f, &t, &data, 0, 0, 0);
-  CHECK_EQ(0x00007e7d, t.ldrh);
-  CHECK_EQ(0x00007e7d, t.ldrsh);
-  CHECK_EQ(0x807f7e7d, t.ldr);
+  CHECK_EQ(0x00007e7du, t.ldrh);
+  CHECK_EQ(0x00007e7du, t.ldrsh);
+  CHECK_EQ(0x807f7e7du, t.ldr);
   dummy = CALL_GENERATED_CODE(isolate, f, &t, &data, 1, 0, 0);
-  CHECK_EQ(0x00007f7e, t.ldrh);
-  CHECK_EQ(0x00007f7e, t.ldrsh);
-  CHECK_EQ(0x81807f7e, t.ldr);
+  CHECK_EQ(0x00007f7eu, t.ldrh);
+  CHECK_EQ(0x00007f7eu, t.ldrsh);
+  CHECK_EQ(0x81807f7eu, t.ldr);
   dummy = CALL_GENERATED_CODE(isolate, f, &t, &data, 2, 0, 0);
-  CHECK_EQ(0x0000807f, t.ldrh);
-  CHECK_EQ(0xffff807f, t.ldrsh);
-  CHECK_EQ(0x8281807f, t.ldr);
+  CHECK_EQ(0x0000807fu, t.ldrh);
+  CHECK_EQ(0xffff807fu, t.ldrsh);
+  CHECK_EQ(0x8281807fu, t.ldr);
   dummy = CALL_GENERATED_CODE(isolate, f, &t, &data, 3, 0, 0);
-  CHECK_EQ(0x00008180, t.ldrh);
-  CHECK_EQ(0xffff8180, t.ldrsh);
-  CHECK_EQ(0x83828180, t.ldr);
+  CHECK_EQ(0x00008180u, t.ldrh);
+  CHECK_EQ(0xffff8180u, t.ldrsh);
+  CHECK_EQ(0x83828180u, t.ldr);
 }
 
 TEST(unaligned_stores) {
   // All supported ARM targets allow unaligned accesses.
   CcTest::InitializeVM();
   Isolate* isolate = CcTest::i_isolate();
   HandleScope scope(isolate);
 
   Assembler assm(isolate, NULL, 0);
   __ strh(r3, MemOperand(r0, r2));
@@ skipping 146 matching lines @@
   HandleScope scope(isolate);
 
   Assembler assm(isolate, NULL, 0);
   __ mov(r0, Operand(isolate->factory()->infinity_value()));
   __ BlockConstPoolFor(1019);
   for (int i = 0; i < 1019; ++i) __ nop();
   __ vldr(d0, MemOperand(r0, 0));
 }
 
 #undef __