diff options
| -rw-r--r-- | src/passes/CoalesceLocals.cpp | 5 | ||||
| -rw-r--r-- | src/wasm2js.h | 1 |
2 files changed, 6 insertions, 0 deletions
diff --git a/src/passes/CoalesceLocals.cpp b/src/passes/CoalesceLocals.cpp index 232685001..e5416971b 100644 --- a/src/passes/CoalesceLocals.cpp +++ b/src/passes/CoalesceLocals.cpp @@ -19,6 +19,11 @@ // is similar to register allocation, however, there is never any // spilling, and there isn't a fixed number of locals. // +// NB: This pass is nonlinear in the number of locals. It is best to run it +// after the number of locals has been somewhat reduced by other passes, +// for example by simplify-locals (to remove unneeded uses of locals) and +// reorder-locals (to sort them by # of uses and remove all unneeded ones). +// #include <algorithm> #include <memory> diff --git a/src/wasm2js.h b/src/wasm2js.h index cc2cfa128..1fe5db0c1 100644 --- a/src/wasm2js.h +++ b/src/wasm2js.h @@ -326,6 +326,7 @@ Ref Wasm2JSBuilder::processWasm(Module* wasm, Name funcName) { if (options.optimizeLevel > 0) { runner.add("remove-unused-names"); runner.add("merge-blocks"); + runner.add("reorder-locals"); runner.add("coalesce-locals"); } runner.add("reorder-locals"); |