Subzero: Crosstest test_arith properly tests i8/i16.

crosstest/test_arith.cpp

 //===- subzero/crosstest/test_arith.cpp - Arithmetic operator tests -------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // Implementation for crosstesting arithmetic operations.
 //
 //===----------------------------------------------------------------------===//
 
 // This aims to test all the arithmetic bitcode instructions across
 // all PNaCl primitive data types.
 
 #include <stdint.h>
 
 #include "test_arith.h"
 #include "xdefs.h"
 
+#if 0
+// The following is commented out, and instead, a python script auto-generates a
+// .ll file with the equivalent functionality.
+
 #define X(inst, op, isdiv, isshift)                                            \
   bool test##inst(bool a, bool b) { return a op b; }                           \
   uint8_t test##inst(uint8_t a, uint8_t b) { return a op b; }                  \
   uint16_t test##inst(uint16_t a, uint16_t b) { return a op b; }               \
   uint32_t test##inst(uint32_t a, uint32_t b) { return a op b; }               \
   uint64 test##inst(uint64 a, uint64 b) { return a op b; }                     \
   v4ui32 test##inst(v4ui32 a, v4ui32 b) { return a op b; }                     \
   v8ui16 test##inst(v8ui16 a, v8ui16 b) { return a op b; }                     \
   v16ui8 test##inst(v16ui8 a, v16ui8 b) { return a op b; }
 UINTOP_TABLE
@@ skipping 11 matching lines @@
 SINTOP_TABLE
 #undef X
 
 #define X(inst, op, func)                                                      \
   float test##inst(float a, float b) { return func(a op b); }                  \
   double test##inst(double a, double b) { return func(a op b); }               \
   v4f32 test##inst(v4f32 a, v4f32 b) { return func(a op b); }
 FPOP_TABLE
 #undef X
 
+#endif // 0
+
 #define X(mult_by)                                                             \
   bool testMultiplyBy##mult_by(bool a, bool /*unused*/) {                      \
     return a * (mult_by);                                                      \
   }                                                                            \
   bool testMultiplyByNeg##mult_by(bool a, bool /*unused*/) {                   \
     return a * (-(mult_by));                                                   \
   }                                                                            \
   uint8_t testMultiplyBy##mult_by(uint8_t a, uint8_t /*unused*/) {             \
     return a * (mult_by);                                                      \
   }                                                                            \
@@ skipping 13 matching lines @@
     return a * (-(mult_by));                                                   \
   }                                                                            \
   uint64_t testMultiplyBy##mult_by(uint64_t a, uint64_t /*unused*/) {          \
     return a * (mult_by);                                                      \
   }                                                                            \
   uint64_t testMultiplyByNeg##mult_by(uint64_t a, uint64_t /*unused*/) {       \
     return a * (-(mult_by));                                                   \
   }
 MULIMM_TABLE
 #undef X