[PATCH] D84634: [NFC] [MIR] Document the reg state flags
Djordje Todorovic via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Jul 27 03:58:55 PDT 2020
djtodoro created this revision.
djtodoro added reviewers: craig.topper, aprantl, dblaikie.
djtodoro added a project: LLVM.
Herald added a subscriber: llvm-commits.
This patch adds documentation for the RegState enumeration.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D84634
Files:
llvm/include/llvm/CodeGen/MachineInstrBuilder.h
Index: llvm/include/llvm/CodeGen/MachineInstrBuilder.h
===================================================================
--- llvm/include/llvm/CodeGen/MachineInstrBuilder.h
+++ llvm/include/llvm/CodeGen/MachineInstrBuilder.h
@@ -40,20 +40,22 @@
namespace RegState {
- enum {
- Define = 0x2,
- Implicit = 0x4,
- Kill = 0x8,
- Dead = 0x10,
- Undef = 0x20,
- EarlyClobber = 0x40,
- Debug = 0x80,
- InternalRead = 0x100,
- Renamable = 0x200,
- DefineNoRead = Define | Undef,
- ImplicitDefine = Implicit | Define,
- ImplicitKill = Implicit | Kill
- };
+enum {
+ Define = 0x2, ///< Register definition.
+ Implicit = 0x4, ///< Not emitted register (e.g. carry, or
+ ///< temporary result).
+ Kill = 0x8, ///< The last use of a register.
+ Dead = 0x10, ///< Unused definition.
+ Undef = 0x20, ///< Value of the register doesn't matter.
+ EarlyClobber = 0x40, ///< Register definition happens before uses.
+ Debug = 0x80, ///< Register 'use' is for debugging purpose.
+ InternalRead = 0x100, ///< Register reads a value that is defined
+ ///< inside the same instruction or bundle.
+ Renamable = 0x200, ///< Register that may be renamed.
+ DefineNoRead = Define | Undef,
+ ImplicitDefine = Implicit | Define,
+ ImplicitKill = Implicit | Kill
+};
} // end namespace RegState
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