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8151779: Some intrinsic flags could be replaced with one general flag

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Add ControlIntrinsic switch

Reviewed-by: neliasso, phh
This commit is contained in:
Xin Liu 2020-06-23 10:40:26 -07:00
parent 6986ab256d
commit 4076ca82d2
14 changed files with 641 additions and 119 deletions
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26
src/hotspot/share/classfile/vmSymbols.hpp
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@ -1635,7 +1635,10 @@ private:
vmSymbols::SID sig,
jshort flags);
// check if the intrinsic is disabled by course-grained flags.
static bool disabled_by_jvm_flags(vmIntrinsics::ID id);
public:
static ID find_id(const char* name);
// Given a method's class, name, signature, and access flags, report its ID.
static ID find_id(vmSymbols::SID holder,
vmSymbols::SID name,
@ -1685,12 +1688,25 @@ public:
// 'method' requires predicated logic.
static int predicates_needed(vmIntrinsics::ID id);
// Returns true if a compiler intrinsic is disabled by command-line flags
// and false otherwise.
static bool is_disabled_by_flags(const methodHandle& method);
// There are 2 kinds of JVM options to control intrinsics.
// 1. Disable/Control Intrinsic accepts a list of intrinsic IDs.
// ControlIntrinsic is recommended. DisableIntrinic will be deprecated.
// Currently, the DisableIntrinsic list prevails if an intrinsic appears on
// both lists.
//
// 2. Explicit UseXXXIntrinsics options. eg. UseAESIntrinsics, UseCRC32Intrinsics etc.
// Each option can control a group of intrinsics. The user can specify them but
// their final values are subject to hardware inspection (VM_Version::initialize).
// Stub generators are controlled by them.
//
// An intrinsic is enabled if and only if neither the fine-grained control(1) nor
// the corresponding coarse-grained control(2) disables it.
static bool is_disabled_by_flags(vmIntrinsics::ID id);
static bool is_intrinsic_disabled(vmIntrinsics::ID id);
static bool is_intrinsic_available(vmIntrinsics::ID id);
static bool is_disabled_by_flags(const methodHandle& method);
static bool is_intrinsic_available(vmIntrinsics::ID id) {
return !is_disabled_by_flags(id);
}
};
#endif // SHARE_CLASSFILE_VMSYMBOLS_HPP