[LLVMbugs] [Bug 4149] New: JIT fails when requiring exact size

[bugzilla-daemon at cs.uiuc.edu]

http://llvm.org/bugs/show_bug.cgi?id=4149

           Summary: JIT fails when requiring exact size
           Product: new-bugs
           Version: unspecified
          Platform: PC
        OS/Version: Windows NT
            Status: NEW
          Severity: normal
          Priority: P2
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: nicolas at capens.net
                CC: llvmbugs at cs.uiuc.edu


When JITMemoryManager.SizeRequired is set to true, recent revisions hit the
assert in X86InstrInfo::sizeOfImm.

The SizeRequired flag is very useful when using a custom JITMemoryManager
implementation (e.g. to compile functions eagerly instead of lazily).
Unfortunately this feature was broken in revision 68645. For reproducing this
it should suffice to set SizeRequired to true in the constructor of
JITMemoryManager, and then run the Fibonacci sample.


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