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add: hidden option to disable slow wasm pass #67715

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Merged
merged 1 commit into from
Oct 18, 2023
Merged

add: hidden option to disable slow wasm pass #67715

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9 changes: 8 additions & 1 deletion llvm/lib/Target/WebAssembly/WebAssemblyTargetMachine.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,12 @@ static cl::opt<bool> WasmDisableExplicitLocals(
" instruction output for test purposes only."),
cl::init(false));

static cl::opt<bool> WasmDisableFixIrreducibleControlFlowPass(
"wasm-disable-fix-irreducible-control-flow-pass", cl::Hidden,
cl::desc("webassembly: disables the fix "
" irreducible control flow optimization pass"),
cl::init(false));

extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeWebAssemblyTarget() {
// Register the target.
RegisterTargetMachine<WebAssemblyTargetMachine> X(
Expand Down Expand Up @@ -537,7 +543,8 @@ void WebAssemblyPassConfig::addPreEmitPass() {
addPass(createWebAssemblyNullifyDebugValueLists());

// Eliminate multiple-entry loops.
addPass(createWebAssemblyFixIrreducibleControlFlow());
if (!WasmDisableFixIrreducibleControlFlowPass)
addPass(createWebAssemblyFixIrreducibleControlFlow());

// Do various transformations for exception handling.
// Every CFG-changing optimizations should come before this.
Expand Down