Sync from internal Google development.

Many improvements, too many to mention.  One significant
perf regression warrants investigation:

omitfp.parsetoproto2_googlemessage1.upb_jit: 343 -> 252 (-26.53)
plain.parsetoproto2_googlemessage1.upb_jit: 334 -> 251 (-24.85)

25% regression for this benchmark is bad, but since I don't think
there's any fundamental design issue that caused it I'm going to
go ahead with the commit anyway.  Can investigate and fix later.

Other benchmarks were neutral or showed slight improvement.

1 files changed, 0 insertions, 121 deletions

diff --git a/tests/tests.c b/tests/tests.c
deleted file mode 100644
index 12ff4bb..0000000
--- a/tests/tests.c
+++ /dev/null
@@ -1,121 +0,0 @@
-
-
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include "upb/def.h"
-#include "upb/handlers.h"
-#include "upb/pb/decoder.h"
-#include "upb/pb/glue.h"
-#include "upb_test.h"
-
-const char *descriptor_file;
-
-static upb_symtab *load_test_proto() {
-  upb_symtab *s = upb_symtab_new();
-  ASSERT(s);
-  upb_status status = UPB_STATUS_INIT;
-  if (!upb_load_descriptor_file_into_symtab(s, descriptor_file, &status)) {
-    fprintf(stderr, "Error loading descriptor file: %s\n",
-            upb_status_getstr(&status));
-    exit(1);
-  }
-  upb_status_uninit(&status);
-  return s;
-}
-
-static upb_flow_t upb_test_onvalue(void *c, upb_value fval, upb_value val) {
-  (void)c;
-  (void)fval;
-  (void)val;
-  return UPB_CONTINUE;
-}
-
-static void test_upb_jit() {
-  upb_symtab *s = load_test_proto();
-  const upb_def *def = upb_symtab_lookup(s, "SimplePrimitives");
-  ASSERT(def);
-
-  upb_handlers *h = upb_handlers_new();
-  upb_handlerset hset = {NULL, NULL, &upb_test_onvalue, NULL, NULL, NULL, NULL};
-  upb_handlers_reghandlerset(h, upb_downcast_msgdef_const(def), &hset);
-  upb_decoderplan *p = upb_decoderplan_new(h, true);
-#ifdef UPB_USE_JIT_X64
-  ASSERT(upb_decoderplan_hasjitcode(p));
-#else
-  ASSERT(!upb_decoderplan_hasjitcode(p));
-#endif
-  upb_decoderplan_unref(p);
-  upb_symtab_unref(s);
-  upb_def_unref(def);
-  upb_handlers_unref(h);
-}
-
-static void test_upb_symtab() {
-  upb_symtab *s = load_test_proto();
-
-  // Test cycle detection by making a cyclic def's main refcount go to zero
-  // and then be incremented to one again.
-  const upb_def *def = upb_symtab_lookup(s, "A");
-  ASSERT(def);
-  upb_symtab_unref(s);
-  const upb_msgdef *m = upb_downcast_msgdef_const(def);
-  upb_msg_iter i = upb_msg_begin(m);
-  ASSERT(!upb_msg_done(i));
-  upb_fielddef *f = upb_msg_iter_field(i);
-  ASSERT(upb_hassubdef(f));
-  upb_def *def2 = f->def;
-
-  i = upb_msg_next(m, i);
-  ASSERT(upb_msg_done(i));  // "A" should only have one field.
-
-  ASSERT(upb_downcast_msgdef(def2));
-  upb_def_ref(def2);
-  upb_def_unref(def);
-  upb_def_unref(def2);
-}
-
-static void test_upb_two_fielddefs() {
-  upb_fielddef *f1 = upb_fielddef_new();
-  upb_fielddef *f2 = upb_fielddef_new();
-
-  ASSERT(upb_fielddef_ismutable(f1));
-  upb_fielddef_setname(f1, "");
-  upb_fielddef_setnumber(f1, 1937);
-  upb_fielddef_settype(f1, UPB_TYPE(FIXED64));
-  upb_fielddef_setlabel(f1, UPB_LABEL(REPEATED));
-  upb_fielddef_settypename(f1, "");
-  ASSERT(upb_fielddef_number(f1) == 1937);
-
-  ASSERT(upb_fielddef_ismutable(f2));
-  upb_fielddef_setname(f2, "");
-  upb_fielddef_setnumber(f2, 1572);
-  upb_fielddef_settype(f2, UPB_TYPE(BYTES));
-  upb_fielddef_setlabel(f2, UPB_LABEL(REPEATED));
-  upb_fielddef_settypename(f2, "");
-  ASSERT(upb_fielddef_number(f2) == 1572);
-
-  upb_fielddef_unref(f1);
-  upb_fielddef_unref(f2);
-}
-
-int main(int argc, char *argv[])
-{
-  if (argc < 2) {
-    fprintf(stderr, "Usage: test_cpp <descriptor file>\n");
-    return 1;
-  }
-  descriptor_file = argv[1];
-#define TEST(func) do { \
-  int assertions_before = num_assertions; \
-  printf("Running " #func "..."); fflush(stdout); \
-  func(); \
-  printf("ok (%d assertions).\n", num_assertions - assertions_before); \
-  } while (0)
-
-  TEST(test_upb_symtab);
-  TEST(test_upb_jit);
-  TEST(test_upb_two_fielddefs);
-  printf("All tests passed (%d assertions).\n", num_assertions);
-  return 0;
-}