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8029015: PPC64 (part 216): opto: trap based null and range checks

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On PPC64 use tdi instruction that does a compare and raises SIGTRAP for NULL and range checks.

Reviewed-by: kvn
This commit is contained in:
Goetz Lindenmaier 2013-11-27 16:16:21 -08:00
parent fe89766184
commit ecca1bcc72
21 changed files with 244 additions and 53 deletions
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20
hotspot/src/share/vm/opto/compile.cpp
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@ -860,6 +860,10 @@ Compile::Compile( ciEnv* ci_env, C2Compiler* compiler, ciMethod* target, int osr
int next_slot = _orig_pc_slot + (sizeof(address) / VMRegImpl::stack_slot_size);
set_fixed_slots(next_slot);
// Compute when to use implicit null checks. Used by matching trap based
// nodes and NullCheck optimization.
set_allowed_deopt_reasons();
// Now generate code
Code_Gen();
if (failing()) return;
@ -948,7 +952,8 @@ Compile::Compile( ciEnv* ci_env,
_inlining_incrementally(false),
_print_inlining_list(NULL),
_print_inlining_idx(0),
_preserve_jvm_state(0) {
_preserve_jvm_state(0),
_allowed_reasons(0) {
C = this;
#ifndef PRODUCT
@ -3350,6 +3355,19 @@ bool Compile::too_many_recompiles(ciMethod* method,
}
}
// Compute when not to trap. Used by matching trap based nodes and
// NullCheck optimization.
void Compile::set_allowed_deopt_reasons() {
_allowed_reasons = 0;
if (is_method_compilation()) {
for (int rs = (int)Deoptimization::Reason_none+1; rs < Compile::trapHistLength; rs++) {
assert(rs < BitsPerInt, "recode bit map");
if (!too_many_traps((Deoptimization::DeoptReason) rs)) {
_allowed_reasons |= nth_bit(rs);
}
}
}
}
#ifndef PRODUCT
//------------------------------verify_graph_edges---------------------------