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Add flags to indicate that there are "never" side effects or that there "may be"

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side effects for machine instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45022 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2007-12-14 01:48:59 +00:00
parent fd80072059
commit 6b1da9c39f
5 changed files with 29 additions and 3 deletions
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2
utils/TableGen/CodeGenInstruction.h
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@@ -104,6 +104,8 @@ namespace llvm {
bool hasCtrlDep;
bool isNotDuplicable;
bool hasOptionalDef;
bool mayHaveSideEffects;
bool neverHasSideEffects;
/// ParseOperandName - Parse an operand name like "$foo" or "$foo.bar",
/// where $foo is a whole operand and $foo.bar refers to a suboperand.

8
utils/TableGen/CodeGenTarget.cpp
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@@ -395,9 +395,15 @@ CodeGenInstruction::CodeGenInstruction(Record *R, const std::string &AsmStr)
usesCustomDAGSchedInserter = R->getValueAsBit("usesCustomDAGSchedInserter");
hasCtrlDep = R->getValueAsBit("hasCtrlDep");
isNotDuplicable = R->getValueAsBit("isNotDuplicable");
mayHaveSideEffects = R->getValueAsBit("mayHaveSideEffects");
neverHasSideEffects = R->getValueAsBit("neverHasSideEffects");
hasOptionalDef = false;
hasVariableNumberOfOperands = false;
if (mayHaveSideEffects && neverHasSideEffects)
throw R->getName() +
": cannot have both 'mayHaveSideEffects' and 'neverHasSideEffects' set!";
DagInit *DI;
try {
DI = R->getValueAsDag("OutOperandList");

5
utils/TableGen/InstrInfoEmitter.cpp
View File

@@ -253,8 +253,9 @@ void InstrInfoEmitter::emitRecord(const CodeGenInstruction &Inst, unsigned Num,
if (Inst.hasOptionalDef) OS << "|M_HAS_OPTIONAL_DEF";
if (Inst.usesCustomDAGSchedInserter)
OS << "|M_USES_CUSTOM_DAG_SCHED_INSERTION";
if (Inst.hasVariableNumberOfOperands)
OS << "|M_VARIABLE_OPS";
if (Inst.hasVariableNumberOfOperands) OS << "|M_VARIABLE_OPS";
if (Inst.mayHaveSideEffects) OS << "|M_MAY_HAVE_SIDE_EFFECTS";
if (Inst.neverHasSideEffects) OS << "|M_NEVER_HAS_SIDE_EFFECTS";
OS << ", 0";
// Emit all of the target-specific flags...