Add m-esr52 at 52.6.0

1 files changed, 1744 insertions, 0 deletions

diff --git a/js/src/wasm/WasmBinaryToText.cpp b/js/src/wasm/WasmBinaryToText.cpp
new file mode 100644
index 000000000..50b9d8358
--- /dev/null
+++ b/js/src/wasm/WasmBinaryToText.cpp
@@ -0,0 +1,1744 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ *
+ * Copyright 2015 Mozilla Foundation
+ *
+ * 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.
+ */
+
+#include "wasm/WasmBinaryToText.h"
+
+#include "jsnum.h"
+#include "jsprf.h"
+
+#include "vm/ArrayBufferObject.h"
+#include "vm/StringBuffer.h"
+#include "wasm/WasmAST.h"
+#include "wasm/WasmBinaryToAST.h"
+#include "wasm/WasmTextUtils.h"
+#include "wasm/WasmTypes.h"
+
+using namespace js;
+using namespace js::wasm;
+
+using mozilla::IsInfinite;
+using mozilla::IsNaN;
+using mozilla::IsNegativeZero;
+
+struct WasmRenderContext
+{
+    JSContext* cx;
+    AstModule* module;
+    WasmPrintBuffer& buffer;
+    GeneratedSourceMap* maybeSourceMap;
+    uint32_t indent;
+
+    uint32_t currentFuncIndex;
+
+    WasmRenderContext(JSContext* cx, AstModule* module, WasmPrintBuffer& buffer, GeneratedSourceMap* sourceMap)
+      : cx(cx), module(module), buffer(buffer), maybeSourceMap(sourceMap), indent(0), currentFuncIndex(0)
+    {}
+
+    StringBuffer& sb() { return buffer.stringBuffer(); }
+};
+
+/*****************************************************************************/
+// utilities
+
+// Return true on purpose, so that we have a useful error message to provide to
+// the user.
+static bool
+Fail(WasmRenderContext& c, const char* msg)
+{
+    c.buffer.stringBuffer().clear();
+
+    return c.buffer.append("There was a problem when rendering the wasm text format: ") &&
+           c.buffer.append(msg, strlen(msg)) &&
+           c.buffer.append("\nYou should consider file a bug on Bugzilla in the "
+                           "Core:::JavaScript Engine::JIT component at "
+                           "https://bugzilla.mozilla.org/enter_bug.cgi.");
+}
+
+static bool
+RenderIndent(WasmRenderContext& c)
+{
+    for (uint32_t i = 0; i < c.indent; i++) {
+        if (!c.buffer.append("  "))
+            return false;
+    }
+    return true;
+}
+
+static bool
+RenderInt32(WasmRenderContext& c, int32_t num)
+{
+    return NumberValueToStringBuffer(c.cx, Int32Value(num), c.sb());
+}
+
+static bool
+RenderInt64(WasmRenderContext& c, int64_t num)
+{
+    if (num < 0 && !c.buffer.append("-"))
+        return false;
+    if (!num)
+        return c.buffer.append("0");
+    return RenderInBase<10>(c.sb(), mozilla::Abs(num));
+}
+
+static bool
+RenderDouble(WasmRenderContext& c, RawF64 num)
+{
+    double d = num.fp();
+    if (IsNaN(d))
+        return RenderNaN(c.sb(), num);
+    if (IsNegativeZero(d))
+        return c.buffer.append("-0");
+    if (IsInfinite(d)) {
+        if (d > 0)
+            return c.buffer.append("infinity");
+        return c.buffer.append("-infinity");
+    }
+    return NumberValueToStringBuffer(c.cx, DoubleValue(d), c.sb());
+}
+
+static bool
+RenderFloat32(WasmRenderContext& c, RawF32 num)
+{
+    float f = num.fp();
+    if (IsNaN(f))
+        return RenderNaN(c.sb(), num);
+    return RenderDouble(c, RawF64(double(f)));
+}
+
+static bool
+RenderEscapedString(WasmRenderContext& c, const AstName& s)
+{
+    size_t length = s.length();
+    const char16_t* p = s.begin();
+    for (size_t i = 0; i < length; i++) {
+        char16_t byte = p[i];
+        switch (byte) {
+          case '\n':
+            if (!c.buffer.append("\\n"))
+                return false;
+            break;
+          case '\r':
+            if (!c.buffer.append("\\0d"))
+                return false;
+            break;
+          case '\t':
+            if (!c.buffer.append("\\t"))
+                return false;
+            break;
+          case '\f':
+            if (!c.buffer.append("\\0c"))
+                return false;
+            break;
+          case '\b':
+            if (!c.buffer.append("\\08"))
+                return false;
+            break;
+          case '\\':
+            if (!c.buffer.append("\\\\"))
+                return false;
+            break;
+          case '"' :
+            if (!c.buffer.append("\\\""))
+                return false;
+            break;
+          case '\'':
+            if (!c.buffer.append("\\'"))
+                return false;
+            break;
+          default:
+            if (byte >= 32 && byte < 127) {
+                if (!c.buffer.append((char)byte))
+                    return false;
+            } else {
+                char digit1 = byte / 16, digit2 = byte % 16;
+                if (!c.buffer.append("\\"))
+                    return false;
+                if (!c.buffer.append((char)(digit1 < 10 ? digit1 + '0' : digit1 + 'a' - 10)))
+                    return false;
+                if (!c.buffer.append((char)(digit2 < 10 ? digit2 + '0' : digit2 + 'a' - 10)))
+                    return false;
+            }
+            break;
+        }
+    }
+    return true;
+}
+
+static bool
+RenderExprType(WasmRenderContext& c, ExprType type)
+{
+    switch (type) {
+      case ExprType::Void: return true; // ignoring void
+      case ExprType::I32: return c.buffer.append("i32");
+      case ExprType::I64: return c.buffer.append("i64");
+      case ExprType::F32: return c.buffer.append("f32");
+      case ExprType::F64: return c.buffer.append("f64");
+      default:;
+    }
+
+    MOZ_CRASH("bad type");
+}
+
+static bool
+RenderValType(WasmRenderContext& c, ValType type)
+{
+    return RenderExprType(c, ToExprType(type));
+}
+
+static bool
+RenderName(WasmRenderContext& c, const AstName& name)
+{
+    return c.buffer.append(name.begin(), name.end());
+}
+
+static bool
+RenderRef(WasmRenderContext& c, const AstRef& ref)
+{
+    if (ref.name().empty())
+        return RenderInt32(c, ref.index());
+
+    return RenderName(c, ref.name());
+}
+
+static bool
+RenderBlockNameAndSignature(WasmRenderContext& c, const AstName& name, ExprType type)
+{
+    if (!name.empty()) {
+        if (!c.buffer.append(' '))
+            return false;
+
+        if (!RenderName(c, name))
+            return false;
+    }
+
+    if (!IsVoid(type)) {
+        if (!c.buffer.append(' '))
+            return false;
+
+        if (!RenderExprType(c, type))
+            return false;
+    }
+
+    return true;
+}
+
+static bool
+RenderExpr(WasmRenderContext& c, AstExpr& expr, bool newLine = true);
+
+#define MAP_AST_EXPR(c, expr)                                                         \
+    if (c.maybeSourceMap) {                                                           \
+        uint32_t lineno = c.buffer.lineno();                                          \
+        uint32_t column = c.buffer.column();                                          \
+        if (!c.maybeSourceMap->exprlocs().emplaceBack(lineno, column, expr.offset())) \
+            return false;                                                             \
+    }
+
+/*****************************************************************************/
+// binary format parsing and rendering
+
+static bool
+RenderNop(WasmRenderContext& c, AstNop& nop)
+{
+    if (!RenderIndent(c))
+        return false;
+    MAP_AST_EXPR(c, nop);
+    return c.buffer.append("nop");
+}
+
+static bool
+RenderDrop(WasmRenderContext& c, AstDrop& drop)
+{
+    if (!RenderExpr(c, drop.value()))
+        return false;
+
+    if (!RenderIndent(c))
+        return false;
+    MAP_AST_EXPR(c, drop);
+    return c.buffer.append("drop");
+}
+
+static bool
+RenderUnreachable(WasmRenderContext& c, AstUnreachable& unreachable)
+{
+    if (!RenderIndent(c))
+        return false;
+    MAP_AST_EXPR(c, unreachable);
+    return c.buffer.append("unreachable");
+}
+
+static bool
+RenderCallArgs(WasmRenderContext& c, const AstExprVector& args)
+{
+    for (uint32_t i = 0; i < args.length(); i++) {
+        if (!RenderExpr(c, *args[i]))
+            return false;
+    }
+
+    return true;
+}
+
+static bool
+RenderCall(WasmRenderContext& c, AstCall& call)
+{
+    if (!RenderCallArgs(c, call.args()))
+        return false;
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, call);
+    if (call.op() == Op::Call) {
+        if (!c.buffer.append("call "))
+            return false;
+    } else {
+        return Fail(c, "unexpected operator");
+    }
+
+    return RenderRef(c, call.func());
+}
+
+static bool
+RenderCallIndirect(WasmRenderContext& c, AstCallIndirect& call)
+{
+    if (!RenderCallArgs(c, call.args()))
+        return false;
+
+    if (!RenderExpr(c, *call.index()))
+        return false;
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, call);
+    if (!c.buffer.append("call_indirect "))
+        return false;
+    return RenderRef(c, call.sig());
+}
+
+static bool
+RenderConst(WasmRenderContext& c, AstConst& cst)
+{
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, cst);
+    if (!RenderValType(c, cst.val().type()))
+        return false;
+    if (!c.buffer.append(".const "))
+        return false;
+
+    switch (ToExprType(cst.val().type())) {
+      case ExprType::I32:
+        return RenderInt32(c, (int32_t)cst.val().i32());
+      case ExprType::I64:
+        return RenderInt64(c, (int64_t)cst.val().i64());
+      case ExprType::F32:
+        return RenderFloat32(c, cst.val().f32());
+      case ExprType::F64:
+        return RenderDouble(c, cst.val().f64());
+      default:
+        break;
+    }
+
+    return false;
+}
+
+static bool
+RenderGetLocal(WasmRenderContext& c, AstGetLocal& gl)
+{
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, gl);
+    if (!c.buffer.append("get_local "))
+        return false;
+    return RenderRef(c, gl.local());
+}
+
+static bool
+RenderSetLocal(WasmRenderContext& c, AstSetLocal& sl)
+{
+    if (!RenderExpr(c, sl.value()))
+        return false;
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, sl);
+    if (!c.buffer.append("set_local "))
+        return false;
+    return RenderRef(c, sl.local());
+}
+
+static bool
+RenderTeeLocal(WasmRenderContext& c, AstTeeLocal& tl)
+{
+    if (!RenderExpr(c, tl.value()))
+        return false;
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, tl);
+    if (!c.buffer.append("tee_local "))
+        return false;
+    return RenderRef(c, tl.local());
+}
+
+static bool
+RenderGetGlobal(WasmRenderContext& c, AstGetGlobal& gg)
+{
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, gg);
+    if (!c.buffer.append("get_global "))
+        return false;
+    return RenderRef(c, gg.global());
+}
+
+static bool
+RenderSetGlobal(WasmRenderContext& c, AstSetGlobal& sg)
+{
+    if (!RenderExpr(c, sg.value()))
+        return false;
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, sg);
+    if (!c.buffer.append("set_global "))
+        return false;
+    return RenderRef(c, sg.global());
+}
+
+static bool
+RenderExprList(WasmRenderContext& c, const AstExprVector& exprs)
+{
+    for (uint32_t i = 0; i < exprs.length(); i++) {
+        if (!RenderExpr(c, *exprs[i]))
+            return false;
+    }
+    return true;
+}
+
+static bool
+RenderBlock(WasmRenderContext& c, AstBlock& block)
+{
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, block);
+    if (block.op() == Op::Block) {
+        if (!c.buffer.append("block"))
+            return false;
+    } else if (block.op() == Op::Loop) {
+        if (!c.buffer.append("loop"))
+            return false;
+    } else {
+        return Fail(c, "unexpected block kind");
+    }
+
+    if (!RenderBlockNameAndSignature(c, block.name(), block.type()))
+        return false;
+
+    if (!c.buffer.append('\n'))
+        return false;
+
+    c.indent++;
+    if (!RenderExprList(c, block.exprs()))
+        return false;
+    c.indent--;
+
+    if (!RenderIndent(c))
+        return false;
+
+    return c.buffer.append("end");
+}
+
+static bool
+RenderFirst(WasmRenderContext& c, AstFirst& first)
+{
+    return RenderExprList(c, first.exprs());
+}
+
+static bool
+RenderCurrentMemory(WasmRenderContext& c, AstCurrentMemory& cm)
+{
+    if (!RenderIndent(c))
+        return false;
+
+    return c.buffer.append("current_memory\n");
+}
+
+static bool
+RenderGrowMemory(WasmRenderContext& c, AstGrowMemory& gm)
+{
+    if (!RenderExpr(c, *gm.operand()))
+        return false;
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, gm);
+    return c.buffer.append("grow_memory\n");
+}
+
+static bool
+RenderUnaryOperator(WasmRenderContext& c, AstUnaryOperator& unary)
+{
+    if (!RenderExpr(c, *unary.operand()))
+        return false;
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, unary);
+    const char* opStr;
+    switch (unary.op()) {
+      case Op::I32Eqz:     opStr = "i32.eqz"; break;
+      case Op::I32Clz:     opStr = "i32.clz"; break;
+      case Op::I32Ctz:     opStr = "i32.ctz"; break;
+      case Op::I32Popcnt:  opStr = "i32.popcnt"; break;
+      case Op::I64Clz:     opStr = "i64.clz"; break;
+      case Op::I64Ctz:     opStr = "i64.ctz"; break;
+      case Op::I64Popcnt:  opStr = "i64.popcnt"; break;
+      case Op::F32Abs:     opStr = "f32.abs"; break;
+      case Op::F32Neg:     opStr = "f32.neg"; break;
+      case Op::F32Ceil:    opStr = "f32.ceil"; break;
+      case Op::F32Floor:   opStr = "f32.floor"; break;
+      case Op::F32Sqrt:    opStr = "f32.sqrt"; break;
+      case Op::F32Trunc:   opStr = "f32.trunc"; break;
+      case Op::F32Nearest: opStr = "f32.nearest"; break;
+      case Op::F64Abs:     opStr = "f64.abs"; break;
+      case Op::F64Neg:     opStr = "f64.neg"; break;
+      case Op::F64Ceil:    opStr = "f64.ceil"; break;
+      case Op::F64Floor:   opStr = "f64.floor"; break;
+      case Op::F64Nearest: opStr = "f64.nearest"; break;
+      case Op::F64Sqrt:    opStr = "f64.sqrt"; break;
+      case Op::F64Trunc:   opStr = "f64.trunc"; break;
+      default:               return Fail(c, "unexpected unary operator");
+    }
+
+    return c.buffer.append(opStr, strlen(opStr));
+}
+
+static bool
+RenderBinaryOperator(WasmRenderContext& c, AstBinaryOperator& binary)
+{
+    if (!RenderExpr(c, *binary.lhs()))
+        return false;
+    if (!RenderExpr(c, *binary.rhs()))
+        return false;
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, binary);
+    const char* opStr;
+    switch (binary.op()) {
+      case Op::I32Add:      opStr = "i32.add"; break;
+      case Op::I32Sub:      opStr = "i32.sub"; break;
+      case Op::I32Mul:      opStr = "i32.mul"; break;
+      case Op::I32DivS:     opStr = "i32.div_s"; break;
+      case Op::I32DivU:     opStr = "i32.div_u"; break;
+      case Op::I32RemS:     opStr = "i32.rem_s"; break;
+      case Op::I32RemU:     opStr = "i32.rem_u"; break;
+      case Op::I32And:      opStr = "i32.and"; break;
+      case Op::I32Or:       opStr = "i32.or"; break;
+      case Op::I32Xor:      opStr = "i32.xor"; break;
+      case Op::I32Shl:      opStr = "i32.shl"; break;
+      case Op::I32ShrS:     opStr = "i32.shr_s"; break;
+      case Op::I32ShrU:     opStr = "i32.shr_u"; break;
+      case Op::I32Rotl:     opStr = "i32.rotl"; break;
+      case Op::I32Rotr:     opStr = "i32.rotr"; break;
+      case Op::I64Add:      opStr = "i64.add"; break;
+      case Op::I64Sub:      opStr = "i64.sub"; break;
+      case Op::I64Mul:      opStr = "i64.mul"; break;
+      case Op::I64DivS:     opStr = "i64.div_s"; break;
+      case Op::I64DivU:     opStr = "i64.div_u"; break;
+      case Op::I64RemS:     opStr = "i64.rem_s"; break;
+      case Op::I64RemU:     opStr = "i64.rem_u"; break;
+      case Op::I64And:      opStr = "i64.and"; break;
+      case Op::I64Or:       opStr = "i64.or"; break;
+      case Op::I64Xor:      opStr = "i64.xor"; break;
+      case Op::I64Shl:      opStr = "i64.shl"; break;
+      case Op::I64ShrS:     opStr = "i64.shr_s"; break;
+      case Op::I64ShrU:     opStr = "i64.shr_u"; break;
+      case Op::I64Rotl:     opStr = "i64.rotl"; break;
+      case Op::I64Rotr:     opStr = "i64.rotr"; break;
+      case Op::F32Add:      opStr = "f32.add"; break;
+      case Op::F32Sub:      opStr = "f32.sub"; break;
+      case Op::F32Mul:      opStr = "f32.mul"; break;
+      case Op::F32Div:      opStr = "f32.div"; break;
+      case Op::F32Min:      opStr = "f32.min"; break;
+      case Op::F32Max:      opStr = "f32.max"; break;
+      case Op::F32CopySign: opStr = "f32.copysign"; break;
+      case Op::F64Add:      opStr = "f64.add"; break;
+      case Op::F64Sub:      opStr = "f64.sub"; break;
+      case Op::F64Mul:      opStr = "f64.mul"; break;
+      case Op::F64Div:      opStr = "f64.div"; break;
+      case Op::F64Min:      opStr = "f64.min"; break;
+      case Op::F64Max:      opStr = "f64.max"; break;
+      case Op::F64CopySign: opStr = "f64.copysign"; break;
+      default:                return Fail(c, "unexpected binary operator");
+    }
+
+    return c.buffer.append(opStr, strlen(opStr));
+}
+
+static bool
+RenderTernaryOperator(WasmRenderContext& c, AstTernaryOperator& ternary)
+{
+    if (!RenderExpr(c, *ternary.op0()))
+        return false;
+    if (!RenderExpr(c, *ternary.op1()))
+        return false;
+    if (!RenderExpr(c, *ternary.op2()))
+        return false;
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, ternary);
+    const char* opStr;
+    switch (ternary.op()) {
+      case Op::Select: opStr = "select"; break;
+      default:           return Fail(c, "unexpected ternary operator");
+    }
+
+    return c.buffer.append(opStr, strlen(opStr));
+}
+
+static bool
+RenderComparisonOperator(WasmRenderContext& c, AstComparisonOperator& comp)
+{
+    if (!RenderExpr(c, *comp.lhs()))
+        return false;
+    if (!RenderExpr(c, *comp.rhs()))
+        return false;
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, comp);
+    const char* opStr;
+    switch (comp.op()) {
+      case Op::I32Eq:  opStr = "i32.eq"; break;
+      case Op::I32Ne:  opStr = "i32.ne"; break;
+      case Op::I32LtS: opStr = "i32.lt_s"; break;
+      case Op::I32LtU: opStr = "i32.lt_u"; break;
+      case Op::I32LeS: opStr = "i32.le_s"; break;
+      case Op::I32LeU: opStr = "i32.le_u"; break;
+      case Op::I32GtS: opStr = "i32.gt_s"; break;
+      case Op::I32GtU: opStr = "i32.gt_u"; break;
+      case Op::I32GeS: opStr = "i32.ge_s"; break;
+      case Op::I32GeU: opStr = "i32.ge_u"; break;
+      case Op::I64Eq:  opStr = "i64.eq"; break;
+      case Op::I64Ne:  opStr = "i64.ne"; break;
+      case Op::I64LtS: opStr = "i64.lt_s"; break;
+      case Op::I64LtU: opStr = "i64.lt_u"; break;
+      case Op::I64LeS: opStr = "i64.le_s"; break;
+      case Op::I64LeU: opStr = "i64.le_u"; break;
+      case Op::I64GtS: opStr = "i64.gt_s"; break;
+      case Op::I64GtU: opStr = "i64.gt_u"; break;
+      case Op::I64GeS: opStr = "i64.ge_s"; break;
+      case Op::I64GeU: opStr = "i64.ge_u"; break;
+      case Op::F32Eq:  opStr = "f32.eq"; break;
+      case Op::F32Ne:  opStr = "f32.ne"; break;
+      case Op::F32Lt:  opStr = "f32.lt"; break;
+      case Op::F32Le:  opStr = "f32.le"; break;
+      case Op::F32Gt:  opStr = "f32.gt"; break;
+      case Op::F32Ge:  opStr = "f32.ge"; break;
+      case Op::F64Eq:  opStr = "f64.eq"; break;
+      case Op::F64Ne:  opStr = "f64.ne"; break;
+      case Op::F64Lt:  opStr = "f64.lt"; break;
+      case Op::F64Le:  opStr = "f64.le"; break;
+      case Op::F64Gt:  opStr = "f64.gt"; break;
+      case Op::F64Ge:  opStr = "f64.ge"; break;
+      default:           return Fail(c, "unexpected comparison operator");
+    }
+
+    return c.buffer.append(opStr, strlen(opStr));
+}
+
+static bool
+RenderConversionOperator(WasmRenderContext& c, AstConversionOperator& conv)
+{
+    if (!RenderExpr(c, *conv.operand()))
+        return false;
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, conv);
+    const char* opStr;
+    switch (conv.op()) {
+      case Op::I32WrapI64:        opStr = "i32.wrap/i64"; break;
+      case Op::I32TruncSF32:      opStr = "i32.trunc_s/f32"; break;
+      case Op::I32TruncUF32:      opStr = "i32.trunc_u/f32"; break;
+      case Op::I32ReinterpretF32: opStr = "i32.reinterpret/f32"; break;
+      case Op::I32TruncSF64:      opStr = "i32.trunc_s/f64"; break;
+      case Op::I32TruncUF64:      opStr = "i32.trunc_u/f64"; break;
+      case Op::I64ExtendSI32:     opStr = "i64.extend_s/i32"; break;
+      case Op::I64ExtendUI32:     opStr = "i64.extend_u/i32"; break;
+      case Op::I64TruncSF32:      opStr = "i64.trunc_s/f32"; break;
+      case Op::I64TruncUF32:      opStr = "i64.trunc_u/f32"; break;
+      case Op::I64TruncSF64:      opStr = "i64.trunc_s/f64"; break;
+      case Op::I64TruncUF64:      opStr = "i64.trunc_u/f64"; break;
+      case Op::I64ReinterpretF64: opStr = "i64.reinterpret/f64"; break;
+      case Op::F32ConvertSI32:    opStr = "f32.convert_s/i32"; break;
+      case Op::F32ConvertUI32:    opStr = "f32.convert_u/i32"; break;
+      case Op::F32ReinterpretI32: opStr = "f32.reinterpret/i32"; break;
+      case Op::F32ConvertSI64:    opStr = "f32.convert_s/i64"; break;
+      case Op::F32ConvertUI64:    opStr = "f32.convert_u/i64"; break;
+      case Op::F32DemoteF64:      opStr = "f32.demote/f64"; break;
+      case Op::F64ConvertSI32:    opStr = "f64.convert_s/i32"; break;
+      case Op::F64ConvertUI32:    opStr = "f64.convert_u/i32"; break;
+      case Op::F64ConvertSI64:    opStr = "f64.convert_s/i64"; break;
+      case Op::F64ConvertUI64:    opStr = "f64.convert_u/i64"; break;
+      case Op::F64ReinterpretI64: opStr = "f64.reinterpret/i64"; break;
+      case Op::F64PromoteF32:     opStr = "f64.promote/f32"; break;
+      case Op::I32Eqz:            opStr = "i32.eqz"; break;
+      case Op::I64Eqz:            opStr = "i64.eqz"; break;
+      default:                      return Fail(c, "unexpected conversion operator");
+    }
+    return c.buffer.append(opStr, strlen(opStr));
+}
+
+static bool
+RenderIf(WasmRenderContext& c, AstIf& if_)
+{
+    if (!RenderExpr(c, if_.cond()))
+        return false;
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, if_);
+    if (!c.buffer.append("if"))
+        return false;
+    if (!RenderBlockNameAndSignature(c, if_.name(), if_.type()))
+        return false;
+    if (!c.buffer.append('\n'))
+        return false;
+
+    c.indent++;
+    if (!RenderExprList(c, if_.thenExprs()))
+        return false;
+    c.indent--;
+
+    if (if_.hasElse()) {
+        if (!RenderIndent(c))
+            return false;
+
+        if (!c.buffer.append("else\n"))
+            return false;
+
+        c.indent++;
+        if (!RenderExprList(c, if_.elseExprs()))
+            return false;
+        c.indent--;
+    }
+
+    if (!RenderIndent(c))
+        return false;
+
+    return c.buffer.append("end");
+}
+
+static bool
+RenderLoadStoreBase(WasmRenderContext& c, const AstLoadStoreAddress& lsa)
+{
+    return RenderExpr(c, lsa.base());
+}
+
+static bool
+RenderLoadStoreAddress(WasmRenderContext& c, const AstLoadStoreAddress& lsa, uint32_t defaultAlignLog2)
+{
+    if (lsa.offset() != 0) {
+        if (!c.buffer.append(" offset="))
+            return false;
+        if (!RenderInt32(c, lsa.offset()))
+            return false;
+    }
+
+    uint32_t alignLog2 = lsa.flags();
+    if (defaultAlignLog2 != alignLog2) {
+        if (!c.buffer.append(" align="))
+            return false;
+        if (!RenderInt32(c, 1 << alignLog2))
+            return false;
+    }
+
+    return true;
+}
+
+static bool
+RenderLoad(WasmRenderContext& c, AstLoad& load)
+{
+    if (!RenderLoadStoreBase(c, load.address()))
+        return false;
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, load);
+    uint32_t defaultAlignLog2;
+    switch (load.op()) {
+      case Op::I32Load8S:
+        if (!c.buffer.append("i32.load8_s"))
+            return false;
+        defaultAlignLog2 = 0;
+        break;
+      case Op::I64Load8S:
+        if (!c.buffer.append("i64.load8_s"))
+            return false;
+        defaultAlignLog2 = 0;
+        break;
+      case Op::I32Load8U:
+        if (!c.buffer.append("i32.load8_u"))
+            return false;
+        defaultAlignLog2 = 0;
+        break;
+      case Op::I64Load8U:
+        if (!c.buffer.append("i64.load8_u"))
+            return false;
+        defaultAlignLog2 = 0;
+        break;
+      case Op::I32Load16S:
+        if (!c.buffer.append("i32.load16_s"))
+            return false;
+        defaultAlignLog2 = 1;
+        break;
+      case Op::I64Load16S:
+        if (!c.buffer.append("i64.load16_s"))
+            return false;
+        defaultAlignLog2 = 1;
+        break;
+      case Op::I32Load16U:
+        if (!c.buffer.append("i32.load16_u"))
+            return false;
+        defaultAlignLog2 = 1;
+        break;
+      case Op::I64Load16U:
+        if (!c.buffer.append("i64.load16_u"))
+            return false;
+        defaultAlignLog2 = 1;
+        break;
+      case Op::I64Load32S:
+        if (!c.buffer.append("i64.load32_s"))
+            return false;
+        defaultAlignLog2 = 2;
+        break;
+      case Op::I64Load32U:
+        if (!c.buffer.append("i64.load32_u"))
+            return false;
+        defaultAlignLog2 = 2;
+        break;
+      case Op::I32Load:
+        if (!c.buffer.append("i32.load"))
+            return false;
+        defaultAlignLog2 = 2;
+        break;
+      case Op::I64Load:
+        if (!c.buffer.append("i64.load"))
+            return false;
+        defaultAlignLog2 = 3;
+        break;
+      case Op::F32Load:
+        if (!c.buffer.append("f32.load"))
+            return false;
+        defaultAlignLog2 = 2;
+        break;
+      case Op::F64Load:
+        if (!c.buffer.append("f64.load"))
+            return false;
+        defaultAlignLog2 = 3;
+        break;
+      default:
+        return Fail(c, "unexpected load operator");
+    }
+
+    return RenderLoadStoreAddress(c, load.address(), defaultAlignLog2);
+}
+
+static bool
+RenderStore(WasmRenderContext& c, AstStore& store)
+{
+    if (!RenderLoadStoreBase(c, store.address()))
+        return false;
+
+    if (!RenderExpr(c, store.value()))
+        return false;
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, store);
+    uint32_t defaultAlignLog2;
+    switch (store.op()) {
+      case Op::I32Store8:
+        if (!c.buffer.append("i32.store8"))
+            return false;
+        defaultAlignLog2 = 0;
+        break;
+      case Op::I64Store8:
+        if (!c.buffer.append("i64.store8"))
+            return false;
+        defaultAlignLog2 = 0;
+        break;
+      case Op::I32Store16:
+        if (!c.buffer.append("i32.store16"))
+            return false;
+        defaultAlignLog2 = 1;
+        break;
+      case Op::I64Store16:
+        if (!c.buffer.append("i64.store16"))
+            return false;
+        defaultAlignLog2 = 1;
+        break;
+      case Op::I64Store32:
+        if (!c.buffer.append("i64.store32"))
+            return false;
+        defaultAlignLog2 = 2;
+        break;
+      case Op::I32Store:
+        if (!c.buffer.append("i32.store"))
+            return false;
+        defaultAlignLog2 = 2;
+        break;
+      case Op::I64Store:
+        if (!c.buffer.append("i64.store"))
+            return false;
+        defaultAlignLog2 = 3;
+        break;
+      case Op::F32Store:
+        if (!c.buffer.append("f32.store"))
+            return false;
+        defaultAlignLog2 = 2;
+        break;
+      case Op::F64Store:
+        if (!c.buffer.append("f64.store"))
+            return false;
+        defaultAlignLog2 = 3;
+        break;
+      default:
+        return Fail(c, "unexpected store operator");
+    }
+
+    return RenderLoadStoreAddress(c, store.address(), defaultAlignLog2);
+}
+
+static bool
+RenderBranch(WasmRenderContext& c, AstBranch& branch)
+{
+    Op op = branch.op();
+    MOZ_ASSERT(op == Op::BrIf || op == Op::Br);
+
+    if (op == Op::BrIf) {
+        if (!RenderExpr(c, branch.cond()))
+            return false;
+    }
+
+    if (branch.maybeValue()) {
+        if (!RenderExpr(c, *(branch.maybeValue())))
+            return false;
+    }
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, branch);
+    if (op == Op::BrIf ? !c.buffer.append("br_if ") : !c.buffer.append("br "))
+        return false;
+
+    return RenderRef(c, branch.target());
+}
+
+static bool
+RenderBrTable(WasmRenderContext& c, AstBranchTable& table)
+{
+    if (table.maybeValue()) {
+        if (!RenderExpr(c, *(table.maybeValue())))
+            return false;
+    }
+
+    // Index
+    if (!RenderExpr(c, table.index()))
+        return false;
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, table);
+    if (!c.buffer.append("br_table "))
+        return false;
+
+    uint32_t tableLength = table.table().length();
+    for (uint32_t i = 0; i < tableLength; i++) {
+        if (!RenderRef(c, table.table()[i]))
+            return false;
+
+        if (!c.buffer.append(" "))
+            return false;
+    }
+
+    return RenderRef(c, table.def());
+}
+
+static bool
+RenderReturn(WasmRenderContext& c, AstReturn& ret)
+{
+    if (ret.maybeExpr()) {
+        if (!RenderExpr(c, *(ret.maybeExpr())))
+            return false;
+    }
+
+    if (!RenderIndent(c))
+        return false;
+
+    MAP_AST_EXPR(c, ret);
+    return c.buffer.append("return");
+}
+
+static bool
+RenderExpr(WasmRenderContext& c, AstExpr& expr, bool newLine /* = true */)
+{
+    switch (expr.kind()) {
+      case AstExprKind::Drop:
+        if (!RenderDrop(c, expr.as<AstDrop>()))
+            return false;
+        break;
+      case AstExprKind::Nop:
+        if (!RenderNop(c, expr.as<AstNop>()))
+            return false;
+        break;
+      case AstExprKind::Unreachable:
+        if (!RenderUnreachable(c, expr.as<AstUnreachable>()))
+            return false;
+        break;
+      case AstExprKind::Call:
+        if (!RenderCall(c, expr.as<AstCall>()))
+            return false;
+        break;
+      case AstExprKind::CallIndirect:
+        if (!RenderCallIndirect(c, expr.as<AstCallIndirect>()))
+            return false;
+        break;
+      case AstExprKind::Const:
+        if (!RenderConst(c, expr.as<AstConst>()))
+            return false;
+        break;
+      case AstExprKind::GetLocal:
+        if (!RenderGetLocal(c, expr.as<AstGetLocal>()))
+            return false;
+        break;
+      case AstExprKind::SetLocal:
+        if (!RenderSetLocal(c, expr.as<AstSetLocal>()))
+            return false;
+        break;
+      case AstExprKind::GetGlobal:
+        if (!RenderGetGlobal(c, expr.as<AstGetGlobal>()))
+            return false;
+        break;
+      case AstExprKind::SetGlobal:
+        if (!RenderSetGlobal(c, expr.as<AstSetGlobal>()))
+            return false;
+        break;
+      case AstExprKind::TeeLocal:
+        if (!RenderTeeLocal(c, expr.as<AstTeeLocal>()))
+            return false;
+        break;
+      case AstExprKind::Block:
+        if (!RenderBlock(c, expr.as<AstBlock>()))
+            return false;
+        break;
+      case AstExprKind::If:
+        if (!RenderIf(c, expr.as<AstIf>()))
+            return false;
+        break;
+      case AstExprKind::UnaryOperator:
+        if (!RenderUnaryOperator(c, expr.as<AstUnaryOperator>()))
+            return false;
+        break;
+      case AstExprKind::BinaryOperator:
+        if (!RenderBinaryOperator(c, expr.as<AstBinaryOperator>()))
+            return false;
+        break;
+      case AstExprKind::TernaryOperator:
+        if (!RenderTernaryOperator(c, expr.as<AstTernaryOperator>()))
+            return false;
+        break;
+      case AstExprKind::ComparisonOperator:
+        if (!RenderComparisonOperator(c, expr.as<AstComparisonOperator>()))
+            return false;
+        break;
+      case AstExprKind::ConversionOperator:
+        if (!RenderConversionOperator(c, expr.as<AstConversionOperator>()))
+            return false;
+        break;
+      case AstExprKind::Load:
+        if (!RenderLoad(c, expr.as<AstLoad>()))
+            return false;
+        break;
+      case AstExprKind::Store:
+        if (!RenderStore(c, expr.as<AstStore>()))
+            return false;
+        break;
+      case AstExprKind::Branch:
+        if (!RenderBranch(c, expr.as<AstBranch>()))
+            return false;
+        break;
+      case AstExprKind::BranchTable:
+        if (!RenderBrTable(c, expr.as<AstBranchTable>()))
+            return false;
+        break;
+      case AstExprKind::Return:
+        if (!RenderReturn(c, expr.as<AstReturn>()))
+            return false;
+        break;
+      case AstExprKind::First:
+        newLine = false;
+        if (!RenderFirst(c, expr.as<AstFirst>()))
+            return false;
+        break;
+      case AstExprKind::CurrentMemory:
+        if (!RenderCurrentMemory(c, expr.as<AstCurrentMemory>()))
+            return false;
+        break;
+      case AstExprKind::GrowMemory:
+        if (!RenderGrowMemory(c, expr.as<AstGrowMemory>()))
+            return false;
+        break;
+      default:
+        MOZ_CRASH("Bad AstExprKind");
+    }
+
+    return !newLine || c.buffer.append("\n");
+}
+
+static bool
+RenderSignature(WasmRenderContext& c, const AstSig& sig, const AstNameVector* maybeLocals = nullptr)
+{
+    uint32_t paramsNum = sig.args().length();
+
+    if (maybeLocals) {
+        for (uint32_t i = 0; i < paramsNum; i++) {
+            if (!c.buffer.append(" (param "))
+                return false;
+            const AstName& name = (*maybeLocals)[i];
+            if (!name.empty()) {
+                if (!RenderName(c, name))
+                    return false;
+                if (!c.buffer.append(" "))
+                    return false;
+            }
+            ValType arg = sig.args()[i];
+            if (!RenderValType(c, arg))
+                return false;
+            if (!c.buffer.append(")"))
+                return false;
+        }
+    } else if (paramsNum > 0) {
+        if (!c.buffer.append(" (param"))
+            return false;
+        for (uint32_t i = 0; i < paramsNum; i++) {
+            if (!c.buffer.append(" "))
+                return false;
+            ValType arg = sig.args()[i];
+            if (!RenderValType(c, arg))
+                return false;
+        }
+        if (!c.buffer.append(")"))
+            return false;
+    }
+    if (sig.ret() != ExprType::Void) {
+        if (!c.buffer.append(" (result "))
+            return false;
+        if (!RenderExprType(c, sig.ret()))
+            return false;
+        if (!c.buffer.append(")"))
+            return false;
+    }
+    return true;
+}
+
+static bool
+RenderTypeSection(WasmRenderContext& c, const AstModule::SigVector& sigs)
+{
+    uint32_t numSigs = sigs.length();
+    if (!numSigs)
+        return true;
+
+    for (uint32_t sigIndex = 0; sigIndex < numSigs; sigIndex++) {
+        const AstSig* sig = sigs[sigIndex];
+        if (!RenderIndent(c))
+            return false;
+        if (!c.buffer.append("(type"))
+            return false;
+        if (!sig->name().empty()) {
+            if (!c.buffer.append(" "))
+                return false;
+            if (!RenderName(c, sig->name()))
+                return false;
+        }
+        if (!c.buffer.append(" (func"))
+            return false;
+        if (!RenderSignature(c, *sig))
+            return false;
+        if (!c.buffer.append("))\n"))
+            return false;
+    }
+    return true;
+}
+
+static bool
+RenderLimits(WasmRenderContext& c, const Limits& limits)
+{
+    if (!RenderInt32(c, limits.initial))
+        return false;
+    if (limits.maximum) {
+        if (!c.buffer.append(" "))
+            return false;
+        if (!RenderInt32(c, *limits.maximum))
+            return false;
+    }
+    return true;
+}
+
+static bool
+RenderResizableTable(WasmRenderContext& c, const Limits& table)
+{
+    if (!c.buffer.append("(table "))
+        return false;
+    if (!RenderLimits(c, table))
+        return false;
+    return c.buffer.append(" anyfunc)");
+}
+
+static bool
+RenderTableSection(WasmRenderContext& c, const AstModule& module)
+{
+    if (!module.hasTable())
+        return true;
+    for (const AstResizable& table : module.tables()) {
+        if (table.imported)
+            continue;
+        if (!RenderIndent(c))
+            return false;
+        if (!RenderResizableTable(c, table.limits))
+            return false;
+        if (!c.buffer.append("\n"))
+            return false;
+    }
+    return true;
+}
+
+static bool
+RenderInlineExpr(WasmRenderContext& c, AstExpr& expr)
+{
+    if (!c.buffer.append("("))
+        return false;
+
+    uint32_t prevIndent = c.indent;
+    c.indent = 0;
+    if (!RenderExpr(c, expr, /* newLine */ false))
+        return false;
+    c.indent = prevIndent;
+
+    return c.buffer.append(")");
+}
+
+static bool
+RenderElemSection(WasmRenderContext& c, const AstModule& module)
+{
+    for (const AstElemSegment* segment : module.elemSegments()) {
+        if (!RenderIndent(c))
+            return false;
+        if (!c.buffer.append("(elem "))
+            return false;
+        if (!RenderInlineExpr(c, *segment->offset()))
+            return false;
+
+        for (const AstRef& elem : segment->elems()) {
+            if (!c.buffer.append(" "))
+                return false;
+
+            uint32_t index = elem.index();
+            AstName name = index < module.funcImportNames().length()
+                           ? module.funcImportNames()[index]
+                           : module.funcs()[index - module.funcImportNames().length()]->name();
+
+            if (name.empty()) {
+                if (!RenderInt32(c, index))
+                    return false;
+            } else {
+                if (!RenderName(c, name))
+                    return false;
+            }
+        }
+
+        if (!c.buffer.append(")\n"))
+            return false;
+    }
+
+    return true;
+}
+
+static bool
+RenderGlobal(WasmRenderContext& c, const AstGlobal& glob, bool inImport = false)
+{
+    if (!c.buffer.append("(global "))
+        return false;
+
+    if (!inImport) {
+        if (!RenderName(c, glob.name()))
+            return false;
+        if (!c.buffer.append(" "))
+            return false;
+    }
+
+    if (glob.isMutable()) {
+        if (!c.buffer.append("(mut "))
+            return false;
+        if (!RenderValType(c, glob.type()))
+            return false;
+        if (!c.buffer.append(")"))
+            return false;
+    } else {
+        if (!RenderValType(c, glob.type()))
+            return false;
+    }
+
+    if (glob.hasInit()) {
+        if (!c.buffer.append(" "))
+            return false;
+        if (!RenderInlineExpr(c, glob.init()))
+            return false;
+    }
+
+    if (!c.buffer.append(")"))
+        return false;
+
+    return inImport || c.buffer.append("\n");
+}
+
+static bool
+RenderGlobalSection(WasmRenderContext& c, const AstModule& module)
+{
+    if (module.globals().empty())
+        return true;
+
+    for (const AstGlobal* global : module.globals()) {
+        if (!RenderIndent(c))
+            return false;
+        if (!RenderGlobal(c, *global))
+            return false;
+    }
+
+    return true;
+}
+
+static bool
+RenderResizableMemory(WasmRenderContext& c, Limits memory)
+{
+    if (!c.buffer.append("(memory "))
+        return false;
+
+    MOZ_ASSERT(memory.initial % PageSize == 0);
+    memory.initial /= PageSize;
+
+    if (memory.maximum) {
+        MOZ_ASSERT(*memory.maximum % PageSize == 0);
+        *memory.maximum /= PageSize;
+    }
+
+    if (!RenderLimits(c, memory))
+        return false;
+
+    return c.buffer.append(")");
+}
+
+static bool
+RenderImport(WasmRenderContext& c, AstImport& import, const AstModule& module)
+{
+    if (!RenderIndent(c))
+        return false;
+    if (!c.buffer.append("(import "))
+        return false;
+    if (!RenderName(c, import.name()))
+        return false;
+    if (!c.buffer.append(" \""))
+        return false;
+
+    const AstName& moduleName = import.module();
+    if (!RenderEscapedString(c, moduleName))
+        return false;
+
+    if (!c.buffer.append("\" \""))
+        return false;
+
+    const AstName& fieldName = import.field();
+    if (!RenderEscapedString(c, fieldName))
+        return false;
+
+    if (!c.buffer.append("\" "))
+        return false;
+
+    switch (import.kind()) {
+      case DefinitionKind::Function: {
+        const AstSig* sig = module.sigs()[import.funcSig().index()];
+        if (!RenderSignature(c, *sig))
+            return false;
+        break;
+      }
+      case DefinitionKind::Table: {
+        if (!RenderResizableTable(c, import.limits()))
+            return false;
+        break;
+      }
+      case DefinitionKind::Memory: {
+        if (!RenderResizableMemory(c, import.limits()))
+            return false;
+        break;
+      }
+      case DefinitionKind::Global: {
+        const AstGlobal& glob = import.global();
+        if (!RenderGlobal(c, glob, /* inImport */ true))
+            return false;
+        break;
+      }
+    }
+
+    return c.buffer.append(")\n");
+}
+
+static bool
+RenderImportSection(WasmRenderContext& c, const AstModule& module)
+{
+    for (AstImport* import : module.imports()) {
+        if (!RenderImport(c, *import, module))
+            return false;
+    }
+    return true;
+}
+
+static bool
+RenderExport(WasmRenderContext& c, AstExport& export_,
+             const AstModule::NameVector& funcImportNames,
+             const AstModule::FuncVector& funcs)
+{
+    if (!RenderIndent(c))
+        return false;
+    if (!c.buffer.append("(export \""))
+        return false;
+    if (!RenderEscapedString(c, export_.name()))
+        return false;
+    if (!c.buffer.append("\" "))
+        return false;
+
+    switch (export_.kind()) {
+      case DefinitionKind::Function: {
+        uint32_t index = export_.ref().index();
+        AstName name = index < funcImportNames.length()
+                       ? funcImportNames[index]
+                       : funcs[index - funcImportNames.length()]->name();
+        if (name.empty()) {
+            if (!RenderInt32(c, index))
+                return false;
+        } else {
+            if (!RenderName(c, name))
+                return false;
+        }
+        break;
+      }
+      case DefinitionKind::Table: {
+        if (!c.buffer.append("table"))
+            return false;
+        break;
+      }
+      case DefinitionKind::Memory: {
+        if (!c.buffer.append("memory"))
+            return false;
+        break;
+      }
+      case DefinitionKind::Global: {
+        if (!c.buffer.append("global"))
+            return false;
+        if (!RenderRef(c, export_.ref()))
+            return false;
+        break;
+      }
+    }
+
+    return c.buffer.append(")\n");
+}
+
+static bool
+RenderExportSection(WasmRenderContext& c, const AstModule::ExportVector& exports,
+                    const AstModule::NameVector& funcImportNames,
+                    const AstModule::FuncVector& funcs)
+{
+    uint32_t numExports = exports.length();
+    for (uint32_t i = 0; i < numExports; i++) {
+        if (!RenderExport(c, *exports[i], funcImportNames, funcs))
+            return false;
+    }
+    return true;
+}
+
+static bool
+RenderFunctionBody(WasmRenderContext& c, AstFunc& func, const AstModule::SigVector& sigs)
+{
+    const AstSig* sig = sigs[func.sig().index()];
+
+    size_t startExprIndex = c.maybeSourceMap ? c.maybeSourceMap->exprlocs().length() : 0;
+    uint32_t startLineno = c.buffer.lineno();
+
+    uint32_t argsNum = sig->args().length();
+    uint32_t localsNum = func.vars().length();
+    if (localsNum > 0) {
+        if (!RenderIndent(c))
+            return false;
+        for (uint32_t i = 0; i < localsNum; i++) {
+            if (!c.buffer.append("(local "))
+                return false;
+            const AstName& name = func.locals()[argsNum + i];
+            if (!name.empty()) {
+                if (!RenderName(c, name))
+                    return false;
+                if (!c.buffer.append(" "))
+                    return false;
+            }
+            ValType local = func.vars()[i];
+            if (!RenderValType(c, local))
+                return false;
+            if (!c.buffer.append(") "))
+                return false;
+        }
+        if (!c.buffer.append("\n"))
+            return false;
+    }
+
+
+    uint32_t exprsNum = func.body().length();
+    for (uint32_t i = 0; i < exprsNum; i++) {
+        if (!RenderExpr(c, *func.body()[i]))
+            return false;
+    }
+
+    size_t endExprIndex = c.maybeSourceMap ? c.maybeSourceMap->exprlocs().length() : 0;
+    uint32_t endLineno = c.buffer.lineno();
+
+    if (c.maybeSourceMap) {
+        if (!c.maybeSourceMap->functionlocs().emplaceBack(startExprIndex, endExprIndex,
+                                                          startLineno, endLineno))
+            return false;
+    }
+
+    return true;
+}
+
+static bool
+RenderCodeSection(WasmRenderContext& c, const AstModule::FuncVector& funcs,
+                  const AstModule::SigVector& sigs)
+{
+    uint32_t numFuncBodies = funcs.length();
+    for (uint32_t funcIndex = 0; funcIndex < numFuncBodies; funcIndex++) {
+        AstFunc* func = funcs[funcIndex];
+        uint32_t sigIndex = func->sig().index();
+        AstSig* sig = sigs[sigIndex];
+
+        if (!RenderIndent(c))
+            return false;
+        if (!c.buffer.append("(func "))
+            return false;
+        if (!func->name().empty()) {
+            if (!RenderName(c, func->name()))
+                return false;
+        }
+
+        if (!RenderSignature(c, *sig, &(func->locals())))
+            return false;
+        if (!c.buffer.append("\n"))
+            return false;
+
+        c.currentFuncIndex = funcIndex;
+
+        c.indent++;
+        if (!RenderFunctionBody(c, *func, sigs))
+            return false;
+        c.indent--;
+        if (!RenderIndent(c))
+            return false;
+        if (!c.buffer.append(")\n"))
+            return false;
+    }
+
+    return true;
+}
+
+static bool
+RenderMemorySection(WasmRenderContext& c, const AstModule& module)
+{
+    if (!module.hasMemory())
+        return true;
+
+    for (const AstResizable& memory : module.memories()) {
+        if (memory.imported)
+            continue;
+        if (!RenderIndent(c))
+            return false;
+        if (!RenderResizableMemory(c, memory.limits))
+            return false;
+        if (!c.buffer.append("\n"))
+            return false;
+    }
+
+    return true;
+}
+
+static bool
+RenderDataSection(WasmRenderContext& c, const AstModule& module)
+{
+    uint32_t numSegments = module.dataSegments().length();
+    if (!numSegments)
+        return true;
+
+    for (const AstDataSegment* seg : module.dataSegments()) {
+        if (!RenderIndent(c))
+            return false;
+        if (!c.buffer.append("(data "))
+            return false;
+        if (!RenderInlineExpr(c, *seg->offset()))
+            return false;
+        if (!c.buffer.append("\n"))
+            return false;
+
+        c.indent++;
+        for (const AstName& fragment : seg->fragments()) {
+            if (!RenderIndent(c))
+                return false;
+            if (!c.buffer.append("\""))
+                return false;
+            if (!RenderEscapedString(c, fragment))
+                return false;
+            if (!c.buffer.append("\"\n"))
+                return false;
+        }
+        c.indent--;
+
+        if (!RenderIndent(c))
+            return false;
+        if (!c.buffer.append(")\n"))
+            return false;
+    }
+
+    return true;
+}
+
+static bool
+RenderStartSection(WasmRenderContext& c, AstModule& module)
+{
+    if (!module.hasStartFunc())
+        return true;
+
+    if (!RenderIndent(c))
+        return false;
+    if (!c.buffer.append("(start "))
+        return false;
+    if (!RenderRef(c, module.startFunc().func()))
+        return false;
+    if (!c.buffer.append(")\n"))
+        return false;
+
+    return true;
+}
+
+static bool
+RenderModule(WasmRenderContext& c, AstModule& module)
+{
+    if (!c.buffer.append("(module\n"))
+        return false;
+
+    c.indent++;
+
+    if (!RenderTypeSection(c, module.sigs()))
+        return false;
+
+    if (!RenderImportSection(c, module))
+        return false;
+
+    if (!RenderTableSection(c, module))
+        return false;
+
+    if (!RenderMemorySection(c, module))
+        return false;
+
+    if (!RenderGlobalSection(c, module))
+        return false;
+
+    if (!RenderExportSection(c, module.exports(), module.funcImportNames(), module.funcs()))
+        return false;
+
+    if (!RenderStartSection(c, module))
+        return false;
+
+    if (!RenderElemSection(c, module))
+        return false;
+
+    if (!RenderCodeSection(c, module.funcs(), module.sigs()))
+        return false;
+
+    if (!RenderDataSection(c, module))
+        return false;
+
+    c.indent--;
+
+    if (!c.buffer.append(")"))
+        return false;
+
+    return true;
+}
+
+#undef MAP_AST_EXPR
+
+/*****************************************************************************/
+// Top-level functions
+
+bool
+wasm::BinaryToText(JSContext* cx, const uint8_t* bytes, size_t length, StringBuffer& buffer, GeneratedSourceMap* sourceMap)
+{
+    LifoAlloc lifo(AST_LIFO_DEFAULT_CHUNK_SIZE);
+
+    AstModule* module;
+    if (!BinaryToAst(cx, bytes, length, lifo, &module))
+        return false;
+
+    WasmPrintBuffer buf(buffer);
+    WasmRenderContext c(cx, module, buf, sourceMap);
+
+    if (!RenderModule(c, *module)) {
+        if (!cx->isExceptionPending())
+            ReportOutOfMemory(cx);
+        return false;
+    }
+
+    return true;
+}