Subzero: Refactor x86 register definitions to use the alias mechanism.

unittest/AssemblerX8632/GPRArith.cpp

Index: unittest/AssemblerX8632/GPRArith.cpp
diff --git a/unittest/AssemblerX8632/GPRArith.cpp b/unittest/AssemblerX8632/GPRArith.cpp
index 309e345983a11335af157ffba04d609cf3b88431..c5ed29a8b98e95a173618cd51a4e0ddaa0a247e1 100644
--- a/unittest/AssemblerX8632/GPRArith.cpp
+++ b/unittest/AssemblerX8632/GPRArith.cpp
@@ -54,8 +54,7 @@ TEST_F(AssemblerX8632Test, SetCC) {
     __ cmp(IceType_i32, GPRRegister::Encoded_Reg_##Src0,                       \
            GPRRegister::Encoded_Reg_##Src1);                                   \
     __ mov(IceType_i32, GPRRegister::Encoded_Reg_##Dest, Immediate(0));        \
-    __ setcc(Cond::Br_##C,                                                     \
-             RegX8632::getEncodedByteReg(GPRRegister::Encoded_Reg_##Dest));    \
+    __ setcc(Cond::Br_##C, GPRRegister::Encoded_Reg_##Dest);                   \
     __ setcc(Cond::Br_##C, dwordAddress(T0));                                  \
                                                                                \
     AssembledTest test = assemble();                                           \
@@ -1756,7 +1755,7 @@ TEST_F(AssemblerX8632Test, Bt) {
     __ mov(IceType_i32, GPRRegister::Encoded_Reg_##Dst, Immediate(Value0));    \
     __ mov(IceType_i32, GPRRegister::Encoded_Reg_##Src, Immediate(Value1));    \
     __ bt(GPRRegister::Encoded_Reg_##Dst, GPRRegister::Encoded_Reg_##Src);     \
-    __ setcc(Cond::Br_b, ByteRegister::Encoded_Reg_al);                        \
+    __ setcc(Cond::Br_b, GPRRegister::Encoded_Reg_al);                         \
     __ And(IceType_i32, GPRRegister::Encoded_Reg_eax, Immediate(0xFFu));       \
                                                                                \
     AssembledTest test = assemble();                                           \