Add flags to indicate that there are "never" side effects or that there "may be"
side effects for machine instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45022 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeGenInstruction.h b/utils/TableGen/CodeGenInstruction.h
index c209b13..8f1bf54 100644
--- a/utils/TableGen/CodeGenInstruction.h
+++ b/utils/TableGen/CodeGenInstruction.h
@@ -104,6 +104,8 @@
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.
diff --git a/utils/TableGen/CodeGenTarget.cpp b/utils/TableGen/CodeGenTarget.cpp
index 47bbecb..a2fe370 100644
--- a/utils/TableGen/CodeGenTarget.cpp
+++ b/utils/TableGen/CodeGenTarget.cpp
@@ -395,9 +395,15 @@
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");
diff --git a/utils/TableGen/InstrInfoEmitter.cpp b/utils/TableGen/InstrInfoEmitter.cpp
index 855a0f0..697a7e2 100644
--- a/utils/TableGen/InstrInfoEmitter.cpp
+++ b/utils/TableGen/InstrInfoEmitter.cpp
@@ -253,8 +253,9 @@
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...