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Improved bytecode fusion algorithm #117

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Merged
CharlieTap merged 1 commit into from
Mar 9, 2026
Merged

Improved bytecode fusion algorithm #117

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12 changes: 11 additions & 1 deletion compiler/src/commonMain/kotlin/io/github/charlietap/chasm/compiler/Optimiser.kt
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Original file line number Diff line number Diff line change
@@ -1,8 +1,10 @@
package io.github.charlietap.chasm.compiler

import io.github.charlietap.chasm.compiler.passes.ControlFlowPass
import io.github.charlietap.chasm.compiler.passes.FrameSlotPass
import io.github.charlietap.chasm.compiler.passes.FusionPass
import io.github.charlietap.chasm.compiler.passes.GCPass
import io.github.charlietap.chasm.compiler.passes.JumpPass
import io.github.charlietap.chasm.compiler.passes.Pass
import io.github.charlietap.chasm.compiler.passes.PassContext
import io.github.charlietap.chasm.config.GCStrategy
Expand All @@ -24,6 +26,8 @@ fun Compiler(
module = module,
control = ::ControlFlowPass,
fusion = ::FusionPass,
frameSlot = ::FrameSlotPass,
jump = ::JumpPass,
gc = ::GCPass,
)

Expand All @@ -32,12 +36,18 @@ internal inline fun Compiler(
module: Module,
noinline control: Pass,
noinline fusion: Pass,
noinline frameSlot: Pass,
noinline jump: Pass,
noinline gc: Pass,
): Module {
val context = PassContext(config, module)
val passes = buildList {
add(control)
if (config.bytecodeFusion) add(fusion)
if (config.bytecodeFusion) {
add(fusion)
add(frameSlot)
add(jump)
}
if (config.gcStrategy != GCStrategy.MANUAL) add(gc)
}

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3 changes: 3 additions & 0 deletions compiler/src/commonMain/kotlin/io/github/charlietap/chasm/compiler/ext/InstructionExt.kt
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Expand Up @@ -15,6 +15,9 @@ internal fun Instruction.isAllocating(): Boolean = when (this) {
is FusedAggregateInstruction.StructNew,
is FusedAggregateInstruction.StructNewDefault,
is FusedAggregateInstruction.ArrayNew,
is FusedAggregateInstruction.ArrayNewData,
is FusedAggregateInstruction.ArrayNewDefault,
is FusedAggregateInstruction.ArrayNewElement,
is FusedAggregateInstruction.ArrayNewFixed,
-> true
else -> false
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