[PATCH] [PPC64] Implement the ICBT Instruction for POWER8

[hfinkel at anl.gov]

LGTM.


================
Comment at: test/CodeGen/PowerPC/ppc64-icbt-pwr7.ll:3
@@ +2,3 @@
+; Based on the ppc64-prefetch.ll test
+; RUN: not llc -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 < %s 2>&1 | FileCheck %s
+ 
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Please add a FIXME to this test. Crashing is not really the correct behavior here, we really should just emit nothing.

http://reviews.llvm.org/D6967

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