[LLVMbugs] [Bug 3976] Assert in TargetLowering::SimplifySetCC when using intergers >= 256 bits

Tue, 12 May 2015 05:50:20 -0700 

https://llvm.org/bugs/show_bug.cgi?id=3976

Paweł Bylica <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
                 CC|                            |[email protected]
         Resolution|FIXED                       |---

--- Comment #6 from Paweł Bylica <[email protected]> ---
The assertion failure can still occur.

Test case:
define i1 @test_ult(i256 %a) nounwind {
  %1 = icmp ult i256 %a, -6432394258550908438
  ret i1 %1
}

Possible fix:
http://reviews.llvm.org/D9147

If you think Damien's fix is better (using APInt instead of reducing to
int64_t) I can apply it to current code too.

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