[llvm-commits] Add -arm-long-calls support for ARMFastISel

[Jush Lu]

Hi,

This patch adds -arm-long-calls support for ARMFastISel.

It can generate arm long calls for global functions, runtime library
calls, and memory intrinsics such as llvm.memset.

The testtcases in the patch show how they work. Basically, these long
calls work by blx instructions as the call to non-global callee does
in r157336.

Please help me review, thanks.

Thanks,
Jush
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