[#llvm-MCInstrInfo]
= xref:llvm.adoc[llvm]::MCInstrInfo
:relfileprefix: ../
:mrdocs:

Interface to description of machine instruction set.

== Synopsis

Declared in `<llvm/MC/MCInstrInfo.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class MCInstrInfo;
----

== Type Aliases

[cols="1,4"]
|===
| Name| Description
| xref:llvm/MCInstrInfo/ComplexDeprecationPredicate.adoc[`ComplexDeprecationPredicate`] 
| Function pointer type for complex instruction deprecation checks.
|===


== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:llvm/MCInstrInfo/InitMCInstrInfo.adoc[`InitMCInstrInfo`] 
| Initialize MCInstrInfo, called by TableGen auto‐generated routines. _DO NOT USE_.
| xref:llvm/MCInstrInfo/get.adoc[`get`] 
| Return the machine instruction descriptor that corresponds to the specified instruction opcode.
| xref:llvm/MCInstrInfo/getDeprecatedInfo.adoc[`getDeprecatedInfo`] 
| Returns true if a certain instruction is deprecated and if so returns the reason in `Info.`
| xref:llvm/MCInstrInfo/getName.adoc[`getName`] 
| Returns the name for the instructions with the given opcode.
| xref:llvm/MCInstrInfo/getNumOpcodes.adoc[`getNumOpcodes`] 
| Return the number of instruction opcodes described by this info.
| xref:llvm/MCInstrInfo/getOpRegClassID.adoc[`getOpRegClassID`] 
| Return the register class ID for `OpInfo` under `HwModeId.`
| xref:llvm/MCInstrInfo/getRegClassByHwModeTable.adoc[`getRegClassByHwModeTable`] 
| Return the register‐class lookup row for the given hardware mode.
|===


== Protected Data Members

[cols="1,4"]
|===
| Name| Description
| xref:llvm/MCInstrInfo/NumRegClassByHwModes.adoc[`NumRegClassByHwModes`] 
| Number of register‐class entries per hardware mode in the lookup tables.
| xref:llvm/MCInstrInfo/RegClassByHwModeTables.adoc[`RegClassByHwModeTables`] 
| Flattened [NumHwModes][NumRegClassByHwModes]register‐class lookup tables.
|===


== Derived Classes

[cols="1,4"]
|===
| Name| Description
| xref:llvm/TargetInstrInfo.adoc[`TargetInstrInfo`] 
| TargetInstrInfo ‐ Interface to description of machine instruction set
|===


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