[PATCH] [compiler-rt] fix and simplify GetMaxVirtualAddress for ppc64*

[Jay Foad]

Just one more inline comment.

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Comment at: lib/sanitizer_common/sanitizer_posix.cc:85-86
@@ -84,3 +84,4 @@
   // one of 0x00000fffffffffffUL and 0x00003fffffffffffUL.
   // Note that with 'ulimit -s unlimited' the stack is moved away from the top
   // of the address space, so simply checking the stack address is not enough.
+  // Use helper macros to determine the frame size and handle bit-shifting.
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comment should be tweaked or removed

http://reviews.llvm.org/D6044