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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
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39
hotspot/src/cpu/sparc/vm/c1_LIRAssembler_sparc.cpp
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@ -3361,6 +3361,45 @@ void LIR_Assembler::get_thread(LIR_Opr result_reg) {
__ mov(G2_thread, result_reg->as_register());
}
#ifdef ASSERT
// emit run-time assertion
void LIR_Assembler::emit_assert(LIR_OpAssert* op) {
assert(op->code() == lir_assert, "must be");
if (op->in_opr1()->is_valid()) {
assert(op->in_opr2()->is_valid(), "both operands must be valid");
comp_op(op->condition(), op->in_opr1(), op->in_opr2(), op);
} else {
assert(op->in_opr2()->is_illegal(), "both operands must be illegal");
assert(op->condition() == lir_cond_always, "no other conditions allowed");
}
Label ok;
if (op->condition() != lir_cond_always) {
Assembler::Condition acond;
switch (op->condition()) {
case lir_cond_equal: acond = Assembler::equal; break;
case lir_cond_notEqual: acond = Assembler::notEqual; break;
case lir_cond_less: acond = Assembler::less; break;
case lir_cond_lessEqual: acond = Assembler::lessEqual; break;
case lir_cond_greaterEqual: acond = Assembler::greaterEqual; break;
case lir_cond_greater: acond = Assembler::greater; break;
case lir_cond_aboveEqual: acond = Assembler::greaterEqualUnsigned; break;
case lir_cond_belowEqual: acond = Assembler::lessEqualUnsigned; break;
default: ShouldNotReachHere();
};
__ br(acond, false, Assembler::pt, ok);
__ delayed()->nop();
}
if (op->halt()) {
const char* str = __ code_string(op->msg());
__ stop(str);
} else {
breakpoint();
}
__ bind(ok);
}
#endif
void LIR_Assembler::peephole(LIR_List* lir) {
LIR_OpList* inst = lir->instructions_list();