Allow negation of doubles in asm typer.

test/cctest/test-asm-validator.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/ast/ast.h"
 #include "src/ast/ast-expression-visitor.h"
 #include "src/ast/scopes.h"
 #include "src/parsing/parser.h"
@@ skipping 2348 matching lines @@
           CHECK_VAR(f32, Bounds(cache.kFloat32Array));
           CHECK_EXPR(Literal, Bounds(cache.kAsmFixnum));
         }
         CHECK_EXPR(Literal, Bounds(cache.kAsmDouble));
       }
     }
     CHECK_SKIP();
   }
   CHECK_FUNC_TYPES_END
 }
+
+TEST(NegateDouble) {
+  CHECK_FUNC_TYPES_BEGIN(
+      "function bar() { var x = 0.0; x = -x; }\n"
+      "function foo() { bar(); }") {
+    CHECK_EXPR(FunctionLiteral, FUNC_V_TYPE) {
+      CHECK_EXPR(Assignment, Bounds(cache.kAsmDouble)) {
+        CHECK_VAR(x, Bounds(cache.kAsmDouble));
+        CHECK_EXPR(Literal, Bounds(cache.kAsmDouble));
+      }
+      CHECK_EXPR(Assignment, Bounds(cache.kAsmDouble)) {
+        CHECK_VAR(x, Bounds(cache.kAsmDouble));
+        CHECK_EXPR(BinaryOperation, Bounds(cache.kAsmDouble)) {
+          CHECK_VAR(x, Bounds(cache.kAsmDouble));
+          CHECK_EXPR(Literal, Bounds(cache.kAsmDouble));
+        }
+      }
+    }
+    CHECK_SKIP();
+  }
+  CHECK_FUNC_TYPES_END
+}