Hal Finkel d73bfba7eb [PowerPC] Use 16-byte alignment for modern cores for functions/loops ...

Most modern PowerPC cores prefer that functions and loops start on
16-byte-aligned boundaries (*), so instruct block placement, etc. to make this
happen. The branch selector has also been adjusted so account for the extra
nops that might now be inserted before loop headers.

(*) Some cores actually prefer other alignments for small loops, but that will
    be addressed in a follow-up commit.

llvm-svn: 225115

2015-01-03 14:58:25 +00:00

8.3 KiB

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