[llvm] 4fdc4d8 - [NFC] [MIR] Document the reg state flags
Djordje Todorovic via llvm-commits
llvm-commits at lists.llvm.org
Mon Aug 3 00:03:42 PDT 2020
Author: Djordje Todorovic
Date: 2020-08-03T09:03:24+02:00
New Revision: 4fdc4d892b988bb9f2e06c3440971d28d6361722
URL: https://github.com/llvm/llvm-project/commit/4fdc4d892b988bb9f2e06c3440971d28d6361722
DIFF: https://github.com/llvm/llvm-project/commit/4fdc4d892b988bb9f2e06c3440971d28d6361722.diff
LOG: [NFC] [MIR] Document the reg state flags
This patch adds documentation for the RegState enumeration.
Differential Revision: https://reviews.llvm.org/D84634
Added:
Modified:
llvm/include/llvm/CodeGen/MachineInstrBuilder.h
Removed:
################################################################################
diff --git a/llvm/include/llvm/CodeGen/MachineInstrBuilder.h b/llvm/include/llvm/CodeGen/MachineInstrBuilder.h
index cabb9f1c97c9..b31e9cdb0e90 100644
--- a/llvm/include/llvm/CodeGen/MachineInstrBuilder.h
+++ b/llvm/include/llvm/CodeGen/MachineInstrBuilder.h
@@ -40,20 +40,30 @@ class MDNode;
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 {
+ /// Register definition.
+ Define = 0x2,
+ /// Not emitted register (e.g. carry, or temporary result).
+ Implicit = 0x4,
+ /// The last use of a register.
+ Kill = 0x8,
+ /// Unused definition.
+ Dead = 0x10,
+ /// Value of the register doesn't matter.
+ Undef = 0x20,
+ /// Register definition happens before uses.
+ EarlyClobber = 0x40,
+ /// Register 'use' is for debugging purpose.
+ Debug = 0x80,
+ /// Register reads a value that is defined inside the same instruction or
+ /// bundle.
+ InternalRead = 0x100,
+ /// Register that may be renamed.
+ Renamable = 0x200,
+ DefineNoRead = Define | Undef,
+ ImplicitDefine = Implicit | Define,
+ ImplicitKill = Implicit | Kill
+};
} // end namespace RegState
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