diff --git a/llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-copy-prop-disabled.mir b/llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-copy-prop-disabled.mir
--- a/llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-copy-prop-disabled.mir
+++ b/llvm/test/CodeGen/AArch64/GlobalISel/prelegalizercombiner-copy-prop-disabled.mir
@@ -3,6 +3,11 @@
 # RUN:                                                                | FileCheck --check-prefix=ENABLED %s
 # RUN: llc -run-pass=aarch64-prelegalizer-combiner -global-isel -verify-machineinstrs %s -o - \
 # RUN:     --aarch64prelegalizercombinerhelper-disable-rule=copy_prop | FileCheck --check-prefix=DISABLED %s
+# RUN: llc -run-pass=aarch64-prelegalizer-combiner -global-isel -verify-machineinstrs %s -o - \
+# RUN:     --aarch64prelegalizercombinerhelper-disable-rule="*" | FileCheck --check-prefix=DISABLED %s
+# RUN: llc -run-pass=aarch64-prelegalizer-combiner -global-isel -verify-machineinstrs %s -o - \
+# RUN:     --aarch64prelegalizercombinerhelper-disable-rule="*,!copy_prop" \
+# RUN:    | FileCheck --check-prefix=ENABLED %s
 
 # REQUIRES: asserts
 
diff --git a/llvm/utils/TableGen/GICombinerEmitter.cpp b/llvm/utils/TableGen/GICombinerEmitter.cpp
--- a/llvm/utils/TableGen/GICombinerEmitter.cpp
+++ b/llvm/utils/TableGen/GICombinerEmitter.cpp
@@ -904,6 +904,7 @@
      << "public:\n"
      << "  bool parseCommandLineOption();\n"
      << "  bool isRuleDisabled(unsigned ID) const;\n"
+     << "  bool setRuleEnabled(StringRef RuleIdentifier);\n"
      << "  bool setRuleDisabled(StringRef RuleIdentifier);\n"
      << "\n"
      << "};\n"
@@ -932,30 +933,43 @@
 
   emitNameMatcher(OS);
 
-  OS << "bool " << getClassName()
-     << "RuleConfig::setRuleDisabled(StringRef RuleIdentifier) {\n"
+  OS << "static Optional<std::pair<uint64_t, uint64_t>> "
+        "getRuleRangeForIdentifier(StringRef RuleIdentifier) {\n"
      << "  std::pair<StringRef, StringRef> RangePair = "
         "RuleIdentifier.split('-');\n"
      << "  if (!RangePair.second.empty()) {\n"
-     << "    const auto First = getRuleIdxForIdentifier(RangePair.first);\n"
-     << "    const auto Last = getRuleIdxForIdentifier(RangePair.second);\n"
+     << "    const auto First = "
+        "getRuleIdxForIdentifier(RangePair.first);\n"
+     << "    const auto Last = "
+        "getRuleIdxForIdentifier(RangePair.second);\n"
      << "    if (!First.hasValue() || !Last.hasValue())\n"
-     << "      return false;\n"
+     << "      return None;\n"
      << "    if (First >= Last)\n"
-     << "      report_fatal_error(\"Beginning of range should be before end of "
-        "range\");\n"
-     << "    for (auto I = First.getValue(); I < Last.getValue(); ++I)\n"
-     << "      DisabledRules.set(I);\n"
-     << "    return true;\n"
+     << "      report_fatal_error(\"Beginning of range should be before "
+        "end of range\");\n"
+     << "    return {{ *First, *Last + 1 }};\n"
+     << "  } else if (RangePair.first == \"*\") {\n"
+     << "    return {{ 0, " << Rules.size() << " }};\n"
      << "  } else {\n"
      << "    const auto I = getRuleIdxForIdentifier(RangePair.first);\n"
      << "    if (!I.hasValue())\n"
-     << "      return false;\n"
-     << "    DisabledRules.set(I.getValue());\n"
-     << "    return true;\n"
+     << "      return None;\n"
+     << "    return {{*I, *I + 1}};\n"
      << "  }\n"
-     << "  return false;\n"
-     << "}\n";
+     << "  return None;\n"
+     << "}\n\n";
+
+  for (bool Enabled : {true, false}) {
+    OS << "bool " << getClassName() << "RuleConfig::setRule"
+       << (Enabled ? "Enabled" : "Disabled") << "(StringRef RuleIdentifier) {\n"
+       << "  auto MaybeRange = getRuleRangeForIdentifier(RuleIdentifier);\n"
+       << "  if(!MaybeRange.hasValue())\n"
+       << "    return false;\n"
+       << "  for (auto I = MaybeRange->first; I < MaybeRange->second; ++I)\n"
+       << "    DisabledRules." << (Enabled ? "reset" : "set") << "(I);\n"
+       << "  return true;\n"
+       << "}\n\n";
+  }
 
   OS << "bool " << getClassName()
      << "RuleConfig::isRuleDisabled(unsigned RuleID) const {\n"
@@ -974,9 +988,13 @@
      << "    cl::cat(GICombinerOptionCategory));\n"
      << "\n"
      << "bool " << getClassName() << "RuleConfig::parseCommandLineOption() {\n"
-     << "  for (const auto &Identifier : " << Name << "Option)\n"
-     << "    if (!setRuleDisabled(Identifier))\n"
+     << "  for (StringRef Identifier : " << Name << "Option) {\n"
+     << "    bool Enabled = Identifier.consume_front(\"!\");\n"
+     << "    if (Enabled && !setRuleEnabled(Identifier))\n"
      << "      return false;\n"
+     << "    if (!Enabled && !setRuleDisabled(Identifier))\n"
+     << "      return false;\n"
+     << "  }\n"
      << "  return true;\n"
      << "}\n\n";