[LLVMbugs] [Bug 12490] New: fatal error: error in backend: ran out of registers during register allocation

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=12490

             Bug #: 12490
           Summary: fatal error: error in backend: ran out of registers
                    during register allocation
           Product: clang
           Version: 3.0
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: LLVM Codegen
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: xtaotao at qq.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


I has tryed to build qt4.8.1 with clang, on Ubuntu 11.10, 32bit
the optimization level "O3" is succeeded, but "Oz" or "Os", clang failed with
the follow information:

fatal error: error in backend: ran out of registers during register allocation
fatal error: error in backend: ran out of registers during register allocation
make[1]: *** [.obj/release-shared/qdrawhelper_mmx.o] error 1
make[1]: *** [.obj/release-shared/qdrawhelper_mmx3dnow.o] error 1
fatal error: error in backend: ran out of registers during register allocation
make[1]: *** [.obj/release-shared/qdrawhelper_sse3dnow.o] error 1
fatal error: error in backend: ran out of registers during register allocation
make[1]: *** [.obj/release-shared/qdrawhelper_sse.o] error 1
make: *** [sub-gui-make_default-ordered] error 2

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