From 4a93abc816ee5c68bb893ac0af741cb567a939ed Mon Sep 17 00:00:00 2001
From: Lars T Hansen <lhansen@mozilla.com>
Date: Thu, 31 Jan 2019 13:48:48 +0100
Subject: [PATCH] Bug 1524201 - add message to static_assert.  r=bugfix, CLOSED
 TREE

---
 js/src/jit/arm/Assembler-arm.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/js/src/jit/arm/Assembler-arm.cpp b/js/src/jit/arm/Assembler-arm.cpp
index c0dd6620c873..869c0aedfe3c 100644
--- a/js/src/jit/arm/Assembler-arm.cpp
+++ b/js/src/jit/arm/Assembler-arm.cpp
@@ -1115,8 +1115,8 @@ VFPRegister VFPRegister::singleOverlay(unsigned int which) const {
   return VFPRegister(code_, Single);
 }
 
-// This is necessary for sintOverlay() to make any kind of sense.
-static_assert(FloatRegisters::TotalDouble <= 16);
+static_assert(FloatRegisters::TotalDouble <= 16,
+              "We assume that every Double register also has an Integer personality");
 
 VFPRegister VFPRegister::sintOverlay(unsigned int which) const {
   MOZ_ASSERT(!_isInvalid);