[Bug c++/25199] New: crashing code output from -mtune=pentium4 but not -mtune=pentiumpro

["caolanm at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>]

A fairly tricky one. OOo compiled with -mtune=pentium4 will crash e.g.
http://qa.openoffice.org/issues/show_bug.cgi?id=58368 eventually on drawing
stuff. Problem traced to a particular file. Compied with -mtune=pentiumpro
instead and crash dissappears.

So taking -E code, attached here as salgdi.ii, comiling as 

a)
g++ -S -Os -fno-strict-aliasing -fvisibility=hidden -mtune=pentiumpro
-fvisibility-inlines-hidden -g -fno-exceptions -fpic -o pentiumpro-salgdi.s
salgdi.ii
g++ -c -fpic -o ../../../unxlngi6.pro/slo/salgdi.o pentiumpro-salgdi.s

and all is well, and as 

b)
++ -S -Os -fno-strict-aliasing -fvisibility=hidden -mtune=pentium4
-fvisibility-inlines-hidden -g -fno-exceptions -fpic -o pentium4-salgdi.s
salgdi.ii
g++ -c -fpic -o ../../../unxlngi6.pro/slo/salgdi.o pentium4-salgdi.s

all is not well. 

.s also attached in an attempt to be useful


-- 
           Summary: crashing code output from -mtune=pentium4 but not -
                    mtune=pentiumpro
           Product: gcc
           Version: 4.0.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: caolanm at redhat dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25199