7033154: Improve C1 arraycopy performance

Summary: better static analysis. Take advantage of array copy stubs.
Reviewed-by: never

1 files changed, 1 insertions, 76 deletions

diff --git a/src/share/vm/opto/library_call.cpp b/src/share/vm/opto/library_call.cpp
index 5977ccd13..0f73e144d 100644
--- a/src/share/vm/opto/library_call.cpp
+++ b/src/share/vm/opto/library_call.cpp
@@ -4292,81 +4292,6 @@ bool LibraryCallKit::inline_native_clone(bool is_virtual) {
   return true;
 }
 
-
-// constants for computing the copy function
-enum {
-  COPYFUNC_UNALIGNED = 0,
-  COPYFUNC_ALIGNED = 1,                 // src, dest aligned to HeapWordSize
-  COPYFUNC_CONJOINT = 0,
-  COPYFUNC_DISJOINT = 2                 // src != dest, or transfer can descend
-};
-
-// Note:  The condition "disjoint" applies also for overlapping copies
-// where an descending copy is permitted (i.e., dest_offset <= src_offset).
-static address
-select_arraycopy_function(BasicType t, bool aligned, bool disjoint, const char* &name, bool dest_uninitialized) {
-  int selector =
-    (aligned  ? COPYFUNC_ALIGNED  : COPYFUNC_UNALIGNED) +
-    (disjoint ? COPYFUNC_DISJOINT : COPYFUNC_CONJOINT);
-
-#define RETURN_STUB(xxx_arraycopy) { \
-  name = #xxx_arraycopy; \
-  return StubRoutines::xxx_arraycopy(); }
-
-#define RETURN_STUB_PARM(xxx_arraycopy, parm) {           \
-  name = #xxx_arraycopy; \
-  return StubRoutines::xxx_arraycopy(parm); }
-
-  switch (t) {
-  case T_BYTE:
-  case T_BOOLEAN:
-    switch (selector) {
-    case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jbyte_arraycopy);
-    case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jbyte_arraycopy);
-    case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jbyte_disjoint_arraycopy);
-    case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jbyte_disjoint_arraycopy);
-    }
-  case T_CHAR:
-  case T_SHORT:
-    switch (selector) {
-    case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jshort_arraycopy);
-    case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jshort_arraycopy);
-    case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jshort_disjoint_arraycopy);
-    case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jshort_disjoint_arraycopy);
-    }
-  case T_INT:
-  case T_FLOAT:
-    switch (selector) {
-    case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jint_arraycopy);
-    case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jint_arraycopy);
-    case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jint_disjoint_arraycopy);
-    case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jint_disjoint_arraycopy);
-    }
-  case T_DOUBLE:
-  case T_LONG:
-    switch (selector) {
-    case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jlong_arraycopy);
-    case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jlong_arraycopy);
-    case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB(jlong_disjoint_arraycopy);
-    case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB(arrayof_jlong_disjoint_arraycopy);
-    }
-  case T_ARRAY:
-  case T_OBJECT:
-    switch (selector) {
-    case COPYFUNC_CONJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB_PARM(oop_arraycopy, dest_uninitialized);
-    case COPYFUNC_CONJOINT | COPYFUNC_ALIGNED:    RETURN_STUB_PARM(arrayof_oop_arraycopy, dest_uninitialized);
-    case COPYFUNC_DISJOINT | COPYFUNC_UNALIGNED:  RETURN_STUB_PARM(oop_disjoint_arraycopy, dest_uninitialized);
-    case COPYFUNC_DISJOINT | COPYFUNC_ALIGNED:    RETURN_STUB_PARM(arrayof_oop_disjoint_arraycopy, dest_uninitialized);
-    }
-  default:
-    ShouldNotReachHere();
-    return NULL;
-  }
-
-#undef RETURN_STUB
-#undef RETURN_STUB_PARM
-}
-
 //------------------------------basictype2arraycopy----------------------------
 address LibraryCallKit::basictype2arraycopy(BasicType t,
                                             Node* src_offset,
@@ -4399,7 +4324,7 @@ address LibraryCallKit::basictype2arraycopy(BasicType t,
     disjoint = true;
   }
 
-  return select_arraycopy_function(t, aligned, disjoint, name, dest_uninitialized);
+  return StubRoutines::select_arraycopy_function(t, aligned, disjoint, name, dest_uninitialized);
 }