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8130832: Extend the WhiteBox API to provide information about the availability of compiler intrinsics

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Add a new method, sun.hotspot.WhiteBox.isIntrinsicAvailable, that can be used to determine if an intrinsic is available.

Reviewed-by: kvn, jrose
This commit is contained in:
Zoltan Majo 2015-07-28 19:20:42 +02:00
parent f3d31d3866
commit 422cd18f23
14 changed files with 1347 additions and 607 deletions
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20
hotspot/src/share/vm/classfile/vmSymbols.hpp
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@ -1368,6 +1368,26 @@ public:
// Raw conversion:
static ID for_raw_conversion(BasicType src, BasicType dest);
// The methods below provide information related to compiling intrinsics.
// (1) Information needed by the C1 compiler.
static bool preserves_state(vmIntrinsics::ID id);
static bool can_trap(vmIntrinsics::ID id);
// (2) Information needed by the C2 compiler.
// Returns true if the intrinsic for method 'method' will perform a virtual dispatch.
static bool does_virtual_dispatch(vmIntrinsics::ID id);
// A return value larger than 0 indicates that the intrinsic for method
// 'method' requires predicated logic.
static int predicates_needed(vmIntrinsics::ID id);
// Returns true if an intrinsic is disabled by command-line flags and
// false otherwise. Implements functionality common to the C1
// and the C2 compiler.
static bool is_disabled_by_flags(vmIntrinsics::ID id);
};
#endif // SHARE_VM_CLASSFILE_VMSYMBOLS_HPP