diff options
Diffstat (limited to 'lib/Target/Target.td')
| -rw-r--r-- | lib/Target/Target.td | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/Target/Target.td b/lib/Target/Target.td index 6e2ba91b95..a268e16410 100644 --- a/lib/Target/Target.td +++ b/lib/Target/Target.td @@ -203,22 +203,25 @@ class Instruction { bit usesCustomDAGSchedInserter = 0; // Pseudo instr needing special help. bit hasCtrlDep = 0; // Does this instruction r/w ctrl-flow chains? bit isNotDuplicable = 0; // Is it unsafe to duplicate this instruction? + bit isAsCheapAsAMove = 0; // As cheap (or cheaper) than a move instruction. // Side effect flags - When set, the flags have these meanings: // // hasSideEffects - The instruction has side effects that are not // captured by any operands of the instruction or other flags. + // // mayHaveSideEffects - Some instances of the instruction can have side // effects. The virtual method "isReallySideEffectFree" is called to // determine this. Load instructions are an example of where this is // useful. In general, loads always have side effects. However, loads from // constant pools don't. Individual back ends make this determination. + // // neverHasSideEffects - Set on an instruction with no pattern if it has no // side effects. bit hasSideEffects = 0; bit mayHaveSideEffects = 0; bit neverHasSideEffects = 0; - + InstrItinClass Itinerary = NoItinerary;// Execution steps used for scheduling. string Constraints = ""; // OperandConstraint, e.g. $src = $dst. |