tree 6b9df7ddbde68df51ede2991802319a2dc0e3bcf
parent 22376afd76214281a17a55662d007bdd799f954c
author David Majnemer <david.majnemer@gmail.com> 1419709538 +0000
committer David Majnemer <david.majnemer@gmail.com> 1419709538 +0000

PowerPC: CTR shouldn't fire if a TLS call is in the loop

Determining the address of a TLS variable results in a function call in
certain TLS models.  This means that a simple ICmpInst might actually
result in invalidating the CTR register.

In such cases, do not attempt to rely on the CTR register for loop
optimization purposes.

This fixes PR22034.

Differential Revision: http://reviews.llvm.org/D6786

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224890 91177308-0d34-0410-b5e6-96231b3b80d8