diff --git a/compiler/cli/src/org/jetbrains/kotlin/cli/common/createFlexiblePhaseConfig.kt b/compiler/cli/src/org/jetbrains/kotlin/cli/common/createFlexiblePhaseConfig.kt
index b5171abc397..087e414c3e8 100644
--- a/compiler/cli/src/org/jetbrains/kotlin/cli/common/createFlexiblePhaseConfig.kt
+++ b/compiler/cli/src/org/jetbrains/kotlin/cli/common/createFlexiblePhaseConfig.kt
@@ -6,27 +6,35 @@
 package org.jetbrains.kotlin.cli.common
 
 import org.jetbrains.kotlin.backend.common.phaser.FlexiblePhaseConfig
+import org.jetbrains.kotlin.backend.common.phaser.PhaseSet
 import org.jetbrains.kotlin.cli.common.arguments.CommonCompilerArguments
+import org.jetbrains.kotlin.util.capitalizeDecapitalize.toLowerCaseAsciiOnly
 
 fun createFlexiblePhaseConfig(
     arguments: CommonCompilerArguments,
 ): FlexiblePhaseConfig {
     fun Array<String>?.asNonNullSet(): Set<String> = this?.toSet() ?: emptySet()
 
-    val toDumpBoth = arguments.phasesToDump.asNonNullSet()
-    val toValidateBoth = arguments.phasesToValidate.asNonNullSet()
+    val toDumpBoth = createPhaseSetFromArguments(arguments.phasesToDump)
+    val toValidateBoth = createPhaseSetFromArguments(arguments.phasesToValidate)
 
     return FlexiblePhaseConfig(
         disabled = arguments.disablePhases.asNonNullSet(),
         verbose = arguments.verbosePhases.asNonNullSet(),
-        toDumpStateBefore = arguments.phasesToDumpBefore.asNonNullSet() + toDumpBoth,
-        toDumpStateAfter = arguments.phasesToDumpAfter.asNonNullSet() + toDumpBoth,
-        toValidateStateBefore = arguments.phasesToValidateBefore.asNonNullSet() + toValidateBoth,
-        toValidateStateAfter = arguments.phasesToValidateAfter.asNonNullSet() + toValidateBoth,
+        toDumpStateBefore = createPhaseSetFromArguments(arguments.phasesToDumpBefore) + toDumpBoth,
+        toDumpStateAfter = createPhaseSetFromArguments(arguments.phasesToDumpAfter) + toDumpBoth,
+        toValidateStateBefore = createPhaseSetFromArguments(arguments.phasesToValidateBefore) + toValidateBoth,
+        toValidateStateAfter = createPhaseSetFromArguments(arguments.phasesToValidateAfter) + toValidateBoth,
         dumpOnlyFqName = arguments.dumpOnlyFqName,
         dumpToDirectory = arguments.dumpDirectory,
         needProfiling = arguments.profilePhases,
         checkConditions = arguments.checkPhaseConditions,
         checkStickyConditions = arguments.checkStickyPhaseConditions,
     )
+}
+
+private fun createPhaseSetFromArguments(names: Array<String>?): PhaseSet = when {
+    names == null -> PhaseSet.Enum(emptySet())
+    "all" in names.map { it.toLowerCaseAsciiOnly() } -> PhaseSet.ALL
+    else -> PhaseSet.Enum(names.map { it.toLowerCaseAsciiOnly() }.toSet())
 }
\ No newline at end of file
diff --git a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/phaser/FlexiblePhaseConfig.kt b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/phaser/FlexiblePhaseConfig.kt
index 74d8da7be45..02d5c3145e1 100644
--- a/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/phaser/FlexiblePhaseConfig.kt
+++ b/compiler/ir/backend.common/src/org/jetbrains/kotlin/backend/common/phaser/FlexiblePhaseConfig.kt
@@ -5,6 +5,8 @@
 
 package org.jetbrains.kotlin.backend.common.phaser
 
+import org.jetbrains.kotlin.util.capitalizeDecapitalize.toLowerCaseAsciiOnly
+
 /**
  * Phase configuration that does not know anything
  * about actual compiler pipeline upfront.
@@ -12,10 +14,10 @@ package org.jetbrains.kotlin.backend.common.phaser
 class FlexiblePhaseConfig(
     disabled: Set<String>,
     private val verbose: Set<String>,
-    private val toDumpStateBefore: Set<String>,
-    private val toDumpStateAfter: Set<String>,
-    private val toValidateStateBefore: Set<String>,
-    private val toValidateStateAfter: Set<String>,
+    private val toDumpStateBefore: PhaseSet,
+    private val toDumpStateAfter: PhaseSet,
+    private val toValidateStateBefore: PhaseSet,
+    private val toValidateStateAfter: PhaseSet,
     override val dumpToDirectory: String? = null,
     override val dumpOnlyFqName: String? = null,
     override val needProfiling: Boolean = false,
@@ -35,14 +37,37 @@ class FlexiblePhaseConfig(
     }
 
     override fun shouldDumpStateBefore(phase: AnyNamedPhase): Boolean =
-        phase.name in toDumpStateBefore
+        phase in toDumpStateBefore
 
     override fun shouldDumpStateAfter(phase: AnyNamedPhase): Boolean =
-        phase.name in toDumpStateAfter
+        phase in toDumpStateAfter
 
     override fun shouldValidateStateBefore(phase: AnyNamedPhase): Boolean =
-        phase.name in toValidateStateBefore
+        phase in toValidateStateBefore
 
     override fun shouldValidateStateAfter(phase: AnyNamedPhase): Boolean =
-        phase.name in toValidateStateAfter
+        phase in toValidateStateAfter
+}
+
+sealed class PhaseSet {
+    abstract operator fun contains(phase: AnyNamedPhase): Boolean
+
+    abstract operator fun plus(phaseSet: PhaseSet): PhaseSet
+
+    class Enum(val phases: Set<String>) : PhaseSet() {
+        override fun contains(phase: AnyNamedPhase): Boolean =
+            phase.name.toLowerCaseAsciiOnly() in phases
+
+        override fun plus(phaseSet: PhaseSet): PhaseSet = when (phaseSet) {
+            ALL -> ALL
+            is Enum -> Enum(phases + phaseSet.phases)
+        }
+    }
+    object ALL : PhaseSet() {
+        override fun contains(phase: AnyNamedPhase): Boolean =
+            true
+
+        override fun plus(phaseSet: PhaseSet): PhaseSet = ALL
+    }
+
 }