Peter Collingbourne d9a479e5a0 Thumb2: When optimizing for size, do not if-convert branches involving comparisons with zero.
This allows the constant island pass to lower these branches to cbn?z
instructions, resulting in a shorter instruction sequence.

Differential Revision: http://reviews.llvm.org/D9183

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235638 91177308-0d34-0410-b5e6-96231b3b80d8
2015-04-23 20:31:30 +00:00
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