Register Allocation

A group of interfaces that allow tools to define virtual registers and control the register allocation policy More...

Data Structures
class	gtpin::IGtRegAllocator
	Register allocation interface. More...
class	gtpin::GtVregType
	Type of the virtual register. More...
class	gtpin::IGtVreg
	Virtual register. More...
class	gtpin::IGtVregFactory
	Factory and container of virtual registers. More...
Enumerations
enum	gtpin::VREG_TYPE { ,   gtpin::VREG_TYPE_BYTE,   gtpin::VREG_TYPE_WORD,   gtpin::VREG_TYPE_DWORD,   gtpin::VREG_TYPE_QWORD,   gtpin::VREG_TYPE_OWORD,   gtpin::VREG_TYPE_HWORD,   gtpin::VREG_TYPE_DHWORD,   gtpin::VREG_TYPE_PTR,   gtpin::VREG_TYPE_GRF_REG }
	Type of the virtual register. More...
enum	gtpin::VREG_FLAG {   gtpin::VREG_FLAG_NONE = 0,   gtpin::VREG_FLAG_BUFFER_ADDR = 0x1,   gtpin::VREG_FLAG_COUNTER = 0x2,   gtpin::VREG_FLAG_SCRATCH = 0x4,   gtpin::VREG_FLAG_MSG_ADDR = 0x8,   gtpin::VREG_FLAG_MSG_DATA = 0x10 }
	Vreg flags; can be combined to specify multiple boolean properties of the virtual register. More...

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Detailed Description

A group of interfaces that allow tools to define virtual registers and control the register allocation policy

GTPin performs register allocation as a part of the compilation process that generates binary code for analysis. The Register Allocator is responsible for mapping tool-specific variables in the form of virtual registers into appropriate physical registers, or to the per-thread memory slots.
Interfaces, included in this group, provide methods for defining virtual registers and controlling the register allocation policy.

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Enumeration Type Documentation

enum gtpin::VREG_FLAG

Vreg flags; can be combined to specify multiple boolean properties of the virtual register.

Enumerator:

VREG_FLAG_NONE	"nothing special" flag
VREG_FLAG_BUFFER_ADDR	Deprecated (ignored) flag.
VREG_FLAG_COUNTER	Counter register - zero-initialized on entry to the kernel.
VREG_FLAG_SCRATCH	Scratch register - dead on entry to instrumentation procedure. < This flag is a hint that enables more effective liveness analysis.
VREG_FLAG_MSG_ADDR	Indicates message address payload register. Used as a register allocation hint.
VREG_FLAG_MSG_DATA	Indicates message data payload register. Used as a register allocation hint.

enum gtpin::VREG_TYPE

Type of the virtual register.

Enumerator:

VREG_TYPE_BYTE	1-byte general purpose virtual register
VREG_TYPE_WORD	2-byte general purpose virtual register
VREG_TYPE_DWORD	4-byte general purpose virtual register
VREG_TYPE_QWORD	8-byte general purpose virtual register
VREG_TYPE_OWORD	16-byte general purpose virtual register
VREG_TYPE_HWORD	32-byte general purpose virtual register
VREG_TYPE_DHWORD	64-byte general purpose virtual register
VREG_TYPE_PTR	Virtual register capable of holding memory pointer in the current configuration.
VREG_TYPE_GRF_REG	Virtual register capable of holding full GRF register in the current configuration.