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successfully! woohoo...

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   incorrect results (canonicalization was dropped several commits ago).
2. Add support for fscanf.
3. Suppress a warning about cast to pointer from non-pointer-sized integer.

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#'s.

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Fix PR1358 and test/Assembler/2007-04-25-AssemblerFoldExternWeak.ll, by
creating forward decl globals with linkage extern_weak to defeat implicit
constant folding.

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I just introduced), stub out function reading, purge aggregate values from
the value table before reading functions.

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Change UsedPhysRegs from array bool to BitVector to save some space. Setting / getting its states now go through MachineFunction.

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clobbered by a call.

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when promoted to 64-bits

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