Update sanitizers w.r.t. the new comparisons instrumentation API

[tch1bo]

Summary

Added declarations of __sanitizer_cov_trace_const_cmp[1248] callbacks.
For more details, please see https://reviews.llvm.org/D36465.

[glider]

LGTM

[kcc]

LGTM

[glider]

Landed r310596.

lib/sanitizer_common/sanitizer_coverage_fuchsia.cc

SANITIZER_INTERFACE_ATTRIBUTE void __sanitizer_cov_dump() {
   __sanitizer_dump_trace_pc_guard_coverage();
 }
 // Default empty implementations (weak). Users should redefine them.
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_cmp, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_cmp1, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_cmp2, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_cmp4, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_cmp8, void) {}
+SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_const_cmp1, void) {}
+SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_const_cmp2, void) {}
+SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_const_cmp4, void) {}
+SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_const_cmp8, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_switch, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_div4, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_div8, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_gep, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_pc_indir, void) {}
 }  // extern "C"
 
 #endif  // !SANITIZER_FUCHSIA

lib/sanitizer_common/sanitizer_coverage_interface.inc

 INTERFACE_FUNCTION(__sanitizer_dump_coverage)
 INTERFACE_FUNCTION(__sanitizer_dump_trace_pc_guard_coverage)
 INTERFACE_WEAK_FUNCTION(__sancov_default_options)
 INTERFACE_WEAK_FUNCTION(__sanitizer_cov_trace_cmp)
 INTERFACE_WEAK_FUNCTION(__sanitizer_cov_trace_cmp1)
 INTERFACE_WEAK_FUNCTION(__sanitizer_cov_trace_cmp2)
 INTERFACE_WEAK_FUNCTION(__sanitizer_cov_trace_cmp4)
 INTERFACE_WEAK_FUNCTION(__sanitizer_cov_trace_cmp8)
+INTERFACE_WEAK_FUNCTION(__sanitizer_cov_trace_const_cmp1)
+INTERFACE_WEAK_FUNCTION(__sanitizer_cov_trace_const_cmp2)
+INTERFACE_WEAK_FUNCTION(__sanitizer_cov_trace_const_cmp4)
+INTERFACE_WEAK_FUNCTION(__sanitizer_cov_trace_const_cmp8)
 INTERFACE_WEAK_FUNCTION(__sanitizer_cov_trace_div4)
 INTERFACE_WEAK_FUNCTION(__sanitizer_cov_trace_div8)
 INTERFACE_WEAK_FUNCTION(__sanitizer_cov_trace_gep)
 INTERFACE_WEAK_FUNCTION(__sanitizer_cov_trace_pc_guard)
 INTERFACE_WEAK_FUNCTION(__sanitizer_cov_trace_pc_guard_init)
 INTERFACE_WEAK_FUNCTION(__sanitizer_cov_trace_pc_indir)
 INTERFACE_WEAK_FUNCTION(__sanitizer_cov_trace_switch)
 INTERFACE_WEAK_FUNCTION(__sanitizer_cov_8bit_counters_init)
 INTERFACE_WEAK_FUNCTION(__sanitizer_cov_pcs_init)

lib/sanitizer_common/sanitizer_coverage_libcdep_new.cc

SANITIZER_INTERFACE_ATTRIBUTE void __sanitizer_cov_reset() {
   __sancov::pc_guard_controller.Reset();
 }
 // Default empty implementations (weak). Users should redefine them.
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_cmp, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_cmp1, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_cmp2, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_cmp4, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_cmp8, void) {}
+SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_const_cmp1, void) {}
+SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_const_cmp2, void) {}
+SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_const_cmp4, void) {}
+SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_const_cmp8, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_switch, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_div4, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_div8, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_gep, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_trace_pc_indir, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_8bit_counters_init, void) {}
 SANITIZER_INTERFACE_WEAK_DEF(void, __sanitizer_cov_pcs_init, void) {}
 }  // extern "C"
 
 #endif  // !SANITIZER_FUCHSIA

lib/sanitizer_common/sanitizer_interface_internal.h

extern "C" {
   void __sanitizer_cov_trace_cmp1();
   SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
   void __sanitizer_cov_trace_cmp2();
   SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
   void __sanitizer_cov_trace_cmp4();
   SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
   void __sanitizer_cov_trace_cmp8();
   SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
+  void __sanitizer_cov_trace_const_cmp1();
+  SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
+  void __sanitizer_cov_trace_const_cmp2();
+  SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
+  void __sanitizer_cov_trace_const_cmp4();
+  SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
+  void __sanitizer_cov_trace_const_cmp8();
+  SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
   void __sanitizer_cov_trace_switch();
   SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
   void __sanitizer_cov_trace_div4();
   SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
   void __sanitizer_cov_trace_div8();
   SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE
   void __sanitizer_cov_trace_gep();
   SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE