[X86] div and rem constant exprs invalidate iterators!

[llvmbot]

Bugzilla Link	123
Resolution	FIXED
Resolved on	Feb 22, 2010 12:48
Version	1.0
OS	All
Reporter	LLVM Bugzilla Contributor

Extended Description

The kimwitu++ bytecode file
(/home/vadve/criswell/Downloads/CXXCode/kimwitu++-2.3.8/src/Gen.linux) hits the
following assertion:

lli: /home/vadve/criswell/llvm/lib/Target/X86/InstSelectSimple.cpp:52:
llvm::MachineInstrBuilder llvm::BMI(llvm::MachineBasicBlock*,
__gnu_cxx::__normal_iterator<llvm::MachineInstr**,
std::vector<llvm::MachineInstr*, std::allocatorllvm::MachineInstr* > >&, int,
unsigned int): Assertion `I >= MBB->begin() && I <= MBB->end() && "Bad
iterator!"' failed.

[llvmbot]

assigned to @lattner

[lattner]

I can reproduce this with just the _ZN9__gnu_cxx16__stl_next_primeEm function
and LLC. I'm looking into it.

Thanks!

-Chris

[lattner]

Fixed, here's the patch:
http://mail.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20031117/009616.html

Thanks,

-Chris