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3 Commits

Author SHA1 Message Date
George Rimar de83cbf37e [ELF] - Never use std::sort. 
It turns out we should not use the std::sort anymore.
r327219 added a new wrapper llvm::sort (D39245).
When EXPENSIVE_CHECKS is defined, it shuffles the
input container and that helps to find non-deterministic
ordering.

Patch changes code to use llvm::sort and std::stable_sort
instead of std::sort

Differential revision: https://reviews.llvm.org/D45969

llvm-svn: 330702
 2018-04-24 09:55:39 +00:00
George Rimar 97df22f110 [ELF] - Simplify. NFC. 
llvm-svn: 330597
 2018-04-23 14:41:49 +00:00
Michael J. Spencer b842725c1d [ELF] Add profile guided section layout 
This adds profile guided layout using the Call-Chain Clustering (C³) heuristic
from https://research.fb.com/wp-content/uploads/2017/01/cgo2017-hfsort-final1.pdf .

RFC: [llvm-dev] [RFC] Profile guided section layout
     http://lists.llvm.org/pipermail/llvm-dev/2017-June/114178.html

Pass `--call-graph-ordering-file <file>` to read a call graph profile where each
line has the format:

    <from symbol> <to symbol> <call count>

Differential Revision: https://reviews.llvm.org/D36351

llvm-svn: 330234
 2018-04-17 23:30:05 +00:00