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7153771: array bound check elimination for c1

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When possible optimize out array bound checks, inserting predicates when needed.

Reviewed-by: never, kvn, twisti
This commit is contained in:
Thomas Wuerthinger 2013-03-21 09:27:54 +01:00 • committed by Roland Westrelin
parent 2f4ecb86a2
commit 06ef4cddf7
40 changed files with 2861 additions and 153 deletions
Download patch file Download diff file Expand all files Collapse all files

38
hotspot/src/cpu/sparc/vm/c1_CodeStubs_sparc.cpp
View file

@ -51,6 +51,16 @@ RangeCheckStub::RangeCheckStub(CodeEmitInfo* info, LIR_Opr index,
void RangeCheckStub::emit_code(LIR_Assembler* ce) {
__ bind(_entry);
if (_info->deoptimize_on_exception()) {
address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
__ call(a, relocInfo::runtime_call_type);
__ delayed()->nop();
ce->add_call_info_here(_info);
ce->verify_oop_map(_info);
debug_only(__ should_not_reach_here());
return;
}
if (_index->is_register()) {
__ mov(_index->as_register(), G4);
} else {
@ -64,11 +74,22 @@ void RangeCheckStub::emit_code(LIR_Assembler* ce) {
__ delayed()->nop();
ce->add_call_info_here(_info);
ce->verify_oop_map(_info);
#ifdef ASSERT
__ should_not_reach_here();
#endif
debug_only(__ should_not_reach_here());
}
PredicateFailedStub::PredicateFailedStub(CodeEmitInfo* info) {
_info = new CodeEmitInfo(info);
}
void PredicateFailedStub::emit_code(LIR_Assembler* ce) {
__ bind(_entry);
address a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
__ call(a, relocInfo::runtime_call_type);
__ delayed()->nop();
ce->add_call_info_here(_info);
ce->verify_oop_map(_info);
debug_only(__ should_not_reach_here());
}
void CounterOverflowStub::emit_code(LIR_Assembler* ce) {
__ bind(_entry);
@ -99,10 +120,17 @@ void DivByZeroStub::emit_code(LIR_Assembler* ce) {
void ImplicitNullCheckStub::emit_code(LIR_Assembler* ce) {
address a;
if (_info->deoptimize_on_exception()) {
// Deoptimize, do not throw the exception, because it is probably wrong to do it here.
a = Runtime1::entry_for(Runtime1::predicate_failed_trap_id);
} else {
a = Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id);
}
ce->compilation()->implicit_exception_table()->append(_offset, __ offset());
__ bind(_entry);
__ call(Runtime1::entry_for(Runtime1::throw_null_pointer_exception_id),
relocInfo::runtime_call_type);
__ call(a, relocInfo::runtime_call_type);
__ delayed()->nop();
ce->add_call_info_here(_info);
ce->verify_oop_map(_info);