Generalize some alias analysis logic from atomic
intrinsics to any IntrWriteArgMem intrinsics.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64551 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/IntrinsicEmitter.cpp b/utils/TableGen/IntrinsicEmitter.cpp
index 53081ff..37fc670 100644
--- a/utils/TableGen/IntrinsicEmitter.cpp
+++ b/utils/TableGen/IntrinsicEmitter.cpp
@@ -48,6 +48,9 @@
// Emit the intrinsic parameter attributes.
EmitAttributes(Ints, OS);
+ // Emit intrinsic alias analysis mod/ref behavior.
+ EmitModRefBehavior(Ints, OS);
+
// Emit a list of intrinsics with corresponding GCC builtins.
EmitGCCBuiltinList(Ints, OS);
@@ -481,6 +484,37 @@
OS << "#endif // GET_INTRINSIC_ATTRIBUTES\n\n";
}
+/// EmitModRefBehavior - Determine intrinsic alias analysis mod/ref behavior.
+void IntrinsicEmitter::
+EmitModRefBehavior(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
+ OS << "// Determine intrinsic alias analysis mod/ref behavior.\n";
+ OS << "#ifdef GET_INTRINSIC_MODREF_BEHAVIOR\n";
+ OS << "switch (id) {\n";
+ OS << "default:\n return UnknownModRefBehavior;\n";
+ for (unsigned i = 0, e = Ints.size(); i != e; ++i) {
+ if (Ints[i].ModRef == CodeGenIntrinsic::WriteMem)
+ continue;
+ OS << "case " << TargetPrefix << "Intrinsic::" << Ints[i].EnumName
+ << ":\n";
+ switch (Ints[i].ModRef) {
+ default:
+ assert(false && "Unknown Mod/Ref type!");
+ case CodeGenIntrinsic::NoMem:
+ OS << " return DoesNotAccessMemory;\n";
+ break;
+ case CodeGenIntrinsic::ReadArgMem:
+ case CodeGenIntrinsic::ReadMem:
+ OS << " return OnlyReadsMemory;\n";
+ break;
+ case CodeGenIntrinsic::WriteArgMem:
+ OS << " return AccessesArguments;\n";
+ break;
+ }
+ }
+ OS << "}\n";
+ OS << "#endif // GET_INTRINSIC_MODREF_BEHAVIOR\n\n";
+}
+
void IntrinsicEmitter::
EmitGCCBuiltinList(const std::vector<CodeGenIntrinsic> &Ints, std::ostream &OS){
OS << "// Get the GCC builtin that corresponds to an LLVM intrinsic.\n";