[wasm] [asm.js] Fix asm.js issues around floating point globals.

src/asmjs/asm-wasm-builder.cc

Index: src/asmjs/asm-wasm-builder.cc
diff --git a/src/asmjs/asm-wasm-builder.cc b/src/asmjs/asm-wasm-builder.cc
index 60bdd9a5a8473311ae54c694fd1ec53783f33e63..091f7935f6e3b4db3651cd92f2204a5904c8f6a4 100644
--- a/src/asmjs/asm-wasm-builder.cc
+++ b/src/asmjs/asm-wasm-builder.cc
@@ -1339,13 +1339,16 @@ class AsmWasmBuilderImpl final : public AstVisitor<AsmWasmBuilderImpl> {
     bool returns_value = true;
     switch (call_type) {
       case Call::OTHER_CALL: {
-        DCHECK_EQ(kFuncScope, scope_);
         VariableProxy* proxy = expr->expression()->AsVariableProxy();
         if (proxy != nullptr) {
+          DCHECK(kFuncScope == scope_ ||
+                 typer_->VariableAsStandardMember(proxy->var()) ==
+                     AsmTyper::kMathFround);
           if (VisitStdlibFunction(expr, proxy)) {
             return true;
           }
         }
+        DCHECK(kFuncScope == scope_);
         VariableProxy* vp = expr->expression()->AsVariableProxy();
         DCHECK_NOT_NULL(vp);
         if (typer_->TypeOf(vp)->AsFFIType() != nullptr) {