[Bug 45123] New: gdiplus/ graphicspath test crashes under clang-5.0.1 but not gcc-7.3.0

https://bugs.winehq.org/show_bug.cgi?id=45123

Bug ID: 45123
           Summary: gdiplus/graphicspath test crashes under clang-5.0.1
                    but not gcc-7.3.0
           Product: Wine
           Version: 3.7
          Hardware: x86
               URL: https://test.winehq.org/data/8dca6c35e11a104385242ed83
                    46ee05707b78ef7/linux_ae-gentoo-dbg-clang/gdiplus:grap
                    hicspath.html
                OS: Linux
            Status: NEW
          Keywords: download, source, testcase
          Severity: normal
          Priority: P2
         Component: gdiplus
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail]
      Distribution: Gentoo

Backtrace:
=>0 0x7eca42d9 widen_joint+0x139(p1=<is not available>, p2=<is not available>,
p3=<is not available>, pen=<is not available>, last_point=<has been optimized
away by compiler>)
[/var/lib/jenkins/home/workspace/wine-clang/dlls/gdiplus/graphicspath.c:1849]
in gdiplus (0x0033fc38)
  1 0x7eca2ac1 GdipWidenPath+0x3a0(path=<is not available>, pen=<is not
available>, matrix=<is not available>, flatness=<is not available>)
[/var/lib/jenkins/home/workspace/wine-clang/dlls/gdiplus/graphicspath.c:2029]
in gdiplus (0x0033fca8)
  2 0x7ed36262 func_graphicspath+0x3331() in gdiplus_test (0x0033fe08)
  3 0x7ed74968 main+0x457() in gdiplus_test (0x0033fea8)
  4 0x7ed74caa in gdiplus_test (+0x8fca9) (0x0033fee0)
  5 0x7b45df9c call_process_entry+0xb() in kernel32 (0x0033fef8)
  6 0x7b45e0f3 start_process+0x122(entry=0x7ed74f7a, peb=<is not available>)
[/var/lib/jenkins/home/workspace/wine-clang/dlls/kernel32/process.c:1099] in
kernel32 (0x0033ffdc)
  7 0x7b45dfaa start_process_wrapper+0x9() in kernel32 (0x0033ffec)
0x7eca42d9 widen_joint+0x139
[/var/lib/jenkins/home/workspace/wine-clang/dlls/gdiplus/graphicspath.c:1849]
in gdiplus: divps    %xmm5,%xmm0
1849                float dx0 = distance * (p2->X - p1->X) / length_0;