Selectively invert ICMP operands for better address optimization

src/IceTargetLoweringX8664.cpp

 //===- subzero/src/IceTargetLoweringX8664.cpp - x86-64 lowering -----------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 757 matching lines @@
 // Validate the enum values in ICMPX8664_TABLE.
 namespace dummy2 {
 // Define a temporary set of enum values based on low-level table entries.
 enum _tmp_enum {
 #define X(val, C_32, C1_64, C2_64, C3_64) _tmp_##val,
   ICMPX8664_TABLE
 #undef X
       _num
 };
 // Define a set of constants based on high-level table entries.
-#define X(tag, str) static const int _table1_##tag = InstIcmp::tag;
+#define X(tag, reverse, str) static const int _table1_##tag = InstIcmp::tag;
 ICEINSTICMP_TABLE
 #undef X
 // Define a set of constants based on low-level table entries, and ensure the
 // table entry keys are consistent.
 #define X(val, C_32, C1_64, C2_64, C3_64)                                      \
   static const int _table2_##val = _tmp_##val;                                 \
   static_assert(                                                               \
       _table1_##val == _table2_##val,                                          \
       "Inconsistency between ICMPX8664_TABLE and ICEINSTICMP_TABLE");
 ICMPX8664_TABLE
 #undef X
 // Repeat the static asserts with respect to the high-level table entries in
 // case the high-level table has extra entries.
-#define X(tag, str)                                                            \
+#define X(tag, reverse, str)                                                   \
   static_assert(                                                               \
       _table1_##tag == _table2_##tag,                                          \
       "Inconsistency between ICMPX8664_TABLE and ICEINSTICMP_TABLE");
 ICEINSTICMP_TABLE
 #undef X
 } // end of namespace dummy2
 
 // Validate the enum values in ICETYPEX8664_TABLE.
 namespace dummy3 {
 // Define a temporary set of enum values based on low-level table entries.
@@ skipping 22 matching lines @@
 #define X(tag, sizeLog2, align, elts, elty, str, rcstr)                        \
   static_assert(_table1_##tag == _table2_##tag,                                \
                 "Inconsistency between ICETYPEX8664_TABLE and ICETYPE_TABLE");
 ICETYPE_TABLE
 #undef X
 } // end of namespace dummy3
 } // end of anonymous namespace
 
 } // end of namespace X8664
 } // end of namespace Ice