[LLVMbugs] [Bug 331] NEW: [X86] Large allocas on windows needs incremental stack probing

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Sat May 1 05:46:05 PDT 2004


           Summary: [X86] Large allocas on windows needs incremental stack
           Product: libraries
           Version: 1.0
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: X86 Backend
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: sabre at nondot.org

It looks like windows cannot grow the stack by more than 4K at a time, judging
by some code in the C front-end that LLVM doesn't use:

To fix this, we should either support an out-of-line alloca on windows like GCC
does, or inline the relevant code (which is probably a bad idea for something
this large).


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