tree db36954274f9385c314bdc674ff6119569f916ad
parent 6fcbdddb021da27376e62c32623f92b3904b6211
author Jim Stichnoth <stichnot@chromium.org> 1415309525 -0800
committer Jim Stichnoth <stichnot@chromium.org> 1415309525 -0800

Subzero: Implement InstList in terms of llvm::ilist<> .

Use LLVM's intrusive list ADT template to implement instruction lists.  This embeds prev/next pointers into the instruction, and as such, iterators essentially double as instruction pointers.  This means stripping off one level of indirection when dereferencing, and also the range-based for loop can't be used.

The performance difference in translation time seems to be 1-2%.

I tried to also do this for the much less used PhiList and AssignList, but ran into SFINAE problems.

BUG= none
R=jvoung@chromium.org

Review URL: https://codereview.chromium.org/709533002