generate side-effect info
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26672 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/IntrinsicEmitter.cpp b/utils/TableGen/IntrinsicEmitter.cpp
index 680264f..c77b9ba 100644
--- a/utils/TableGen/IntrinsicEmitter.cpp
+++ b/utils/TableGen/IntrinsicEmitter.cpp
@@ -100,6 +100,9 @@
// Emit mod/ref info for each function.
EmitModRefInfo(Ints, OS);
+
+ // Emit side effect info for each function.
+ EmitSideEffectInfo(Ints, OS);
}
void IntrinsicEmitter::EmitEnumInfo(const std::vector<CodeGenIntrinsic> &Ints,
@@ -191,3 +194,25 @@
}
OS << "#endif\n\n";
}
+
+void IntrinsicEmitter::
+EmitSideEffectInfo(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
+ OS << "// isInstructionTriviallyDead code.\n";
+ OS << "#ifdef GET_SIDE_EFFECT_INFO\n";
+ OS << " switch (F->getIntrinsicID()) {\n";
+ OS << " default: break;\n";
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
+ switch (Ints[i].ModRef) {
+ default: break;
+ case CodeGenIntrinsic::NoMem:
+ case CodeGenIntrinsic::ReadArgMem:
+ case CodeGenIntrinsic::ReadMem:
+ OS << " case Intrinsic::" << Ints[i].EnumName << ":\n";
+ break;
+ }
+ }
+ OS << " return true; // These intrinsics have no side effects.\n";
+ OS << " }\n";
+ OS << "#endif\n\n";
+
+}