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7033154: Improve C1 arraycopy performance

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Better static analysis. Take advantage of array copy stubs.

Reviewed-by: never
This commit is contained in:
Roland Westrelin 2011-04-03 12:00:54 +02:00
parent 00eca5e982
commit f94d7776ca
13 changed files with 720 additions and 146 deletions
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74
hotspot/src/share/vm/runtime/stubRoutines.cpp
View file

@ -433,3 +433,77 @@ address StubRoutines::select_fill_function(BasicType t, bool aligned, const char
#undef RETURN_STUB
}
// 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).
address
StubRoutines::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
}