[PATCH] D48935: [llvm-exegesis] Provide a way to handle memory instructions.

[Guillaume Chatelet via Phabricator via llvm-commits]

gchatelet accepted this revision.
gchatelet added inline comments.
This revision is now accepted and ready to land.


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Comment at: tools/llvm-exegesis/lib/BenchmarkRunner.h:77
+        : UnalignedPtr(new char[kSize + kAlignment]),
+          AlignedPtr(UnalignedPtr + kAlignment -
+                     (reinterpret_cast<intptr_t>(UnalignedPtr) % kAlignment)) {}
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courbet wrote:
> gchatelet wrote:
> > Why not [aligned_alloc](https://en.cppreference.com/w/c/memory/aligned_alloc) ?
> > 
> the alignment of aligned_alloc has to be an alignment for a valid object. Some X86 instructions require 512 byte alignment, wich is not the alignment of any valid object. 
I don't understand why you can't use `aligned_alloc(1024, 1<<20);`?


Repository:
  rL LLVM

https://reviews.llvm.org/D48935