forked from OSchip/llvm-project
8be4ce254a
Currently we use both layout-after and layout-before edges to specify atom orders in the resulting executable. We have a complex piece of code in LayoutPass.cpp to deal with both types of layout specifiers. (In the following description, I denote "Atom A having a layout-after edge to B" as "A -> B", and A's layout-before to B as "A => B".) However, that complexity is not really needed for this reason: If there are atoms such that A => B, B -> A is always satisifed, so using only layout- after relationships will yield the same result as the current code. Actually we have a piece of complex code that verifies that, for each A -> B, B => [ X => Y => ... => Z => ] A is satsified, where X, Y, ... Z are all zero-size atoms. We can get rid of the code from our codebase because layout- before is basically redundant. I think we can simplify the code for layout-after even more than this, but I want to just remove this pass for now for simplicity. Layout-before edges are still there for dead-stripping, so this change won't break it. We will remove layout-before in a followup patch once we fix the dead-stripping pass. Differential Revision: http://llvm-reviews.chandlerc.com/D3164 llvm-svn: 204966 |
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| .. | ||
| CMakeLists.txt | ||
| GOTPass.cpp | ||
| LayoutPass.cpp | ||
| RoundTripNativePass.cpp | ||
| RoundTripYAMLPass.cpp | ||
| StubsPass.cpp | ||