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/*
* Copyright 2015 WebAssembly Community Group participants
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//
// Lowers 64-bit ints to pairs of 32-bit ints, plus some library routines
//
// This is useful for wasm2asm, as JS has no native 64-bit integer support.
//
#include <wasm.h>
#include <pass.h>
namespace wasm {
cashew::IString GET_HIGH("getHigh");
struct LowerInt64 : public Pass {
MixedArena* allocator;
std::map<Expression*, Expression*> fixes; // fixed nodes, outputs of lowering, mapped to their high bits
void prepare(PassRunner* runner, Module *module) override {
allocator = runner->allocator;
}
void makeGetHigh() {
auto ret = allocator->alloc<CallImport>();
ret->target = GET_HIGH;
ret->type = i32;
return ret;
}
void fixCall(CallBase *call) {
auto& operands = call->operands;
for (size_t i = 0; i < operands.size(); i++) {
auto fix = fixes.find(operands[i]);
if (fix != fixes.end()) {
operands.insert(operands.begin() + i + 1, *fix);
}
}
if (curr->type == i64) {
curr->type = i32;
fixes[curr] = makeGetHigh();
}
}
void visitCall(Call *curr) override {
fixCall(curr);
}
void visitCallImport(CallImport *curr) override {
fixCall(curr);
}
void visitCallIndirect(CallIndirect *curr) override {
fixCall(curr);
}
void visitGetLocal(GetLocal *curr) override {
}
void visitSetLocal(SetLocal *curr) override {
}
void visitLoad(Load *curr) override {
}
void visitStore(Store *curr) override {
}
void visitConst(Const *curr) override {
}
void visitUnary(Unary *curr) override {
}
void visitBinary(Binary *curr) override {
}
void visitSelect(Select *curr) override {
}
void visitHost(Host *curr) override {
}
void visitNop(Nop *curr) override {
}
void visitUnreachable(Unreachable *curr) override {
}
void visitFunctionType(FunctionType *curr) override {
}
void visitImport(Import *curr) override {
}
void visitExport(Export *curr) override {
}
void visitFunction(Function *curr) override {
}
void visitTable(Table *curr) override {
}
void visitMemory(Memory *curr) override {
}
void visitModule(Module *curr) override {
}
};
static RegisterPass<LowerInt64> registerPass("lower-i64", "lowers i64 into pairs of i32s");
} // namespace wasm
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