[llvm-commits] Review request: ARM vector ctlz should use target-independent intrinsic

[Joel Jones]

This is one of the first steps at moving to replace target-dependent intrinsics with target-indepdent intrinsics.  The first instruction(s) to be handled are the vector versions of count leading zeros (ctlz).

The changes here are to clang so that it generates a target independent vector ctlz when it sees an ARM dependent vector ctlz.  The changes in llvm are to match the target independent vector ctlz and in VMCore/AutoUpgrade.cpp to update any existing bc files containing ARM dependent vector ctlzs with target-independent ctlzs.  There are also changes to an existing test case in llvm for ARM vector count instructions and a new test for the bitcode upgrade.

<rdar://problem/11831778>

Joel
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