diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/tools/wasm2js.cpp | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/src/tools/wasm2js.cpp b/src/tools/wasm2js.cpp index 06ab81263..e7b62c16a 100644 --- a/src/tools/wasm2js.cpp +++ b/src/tools/wasm2js.cpp @@ -179,6 +179,14 @@ static void optimizeJS(Ref ast) { return false; }; + auto isSignedBitwise = [](Ref node) { + if (node->isArray() && !node->empty() && node[0] == BINARY) { + auto op = node[1]; + return op == OR || op == AND || op == XOR || op == RSHIFT || op == LSHIFT; + } + return false; + }; + auto isUnary = [](Ref node, IString op) { return node->isArray() && !node->empty() && node[0] == UNARY_PREFIX && node[1] == op; @@ -275,9 +283,9 @@ static void optimizeJS(Ref ast) { // x | 0 going into a bitwise op => skip the | 0 node[2] = removeOrZero(node[2]); node[3] = removeOrZero(node[3]); - // x | 0 | 0 => x | 0 + // (x | 0 or similar) | 0 => (x | 0 or similar) if (isOrZero(node)) { - if (isBitwise(node[2])) { + if (isSignedBitwise(node[2])) { replaceInPlace(node, node[2]); } } |