293366 - enable-optimize=-O2 with MS VC breaks CSS support

Status: RESOLVED WORKSFORME

(Core :: CSS Parsing and Computation, defect)

Description

[Frank Wein [:mcsmurf]]

When you compile Mozilla (or Firefox) with MS VC 6.0 (with SP5 and PP of course)
and enable-optimize=-O2, the CSS support seems to break. See Attachment 139836 [details]
for a screenshot.
The code that causes this can be found somewhere in
CSSParserImpl::DoTransferTempData in nsCSSParser.cpp. If you put #pragma
optimize("", off) [...] #pragma optimize("", on) around the function, the
problem goes away.

Comment 1

[Bernard Alleysson]

It works for me with Visual Studio .NET 2003 and Visual Studio 2005 Beta 2

Comment 2

[Ryan VanderMeulen [:RyanVM]]

WFM as well. Given that trunk building with VC6 isn't supported and all supported MSVC versions do work with -O2, resolving WORKSFORME.