[PATCH] D39410: [GVNHoist] Fix non-deterministic sort order of PHIs for identical instructions
Mandeep Singh Grang via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Oct 30 12:43:21 PDT 2017
This revision was automatically updated to reflect the committed changes.
Closed by commit rL316949: [GVNHoist] Fix non-deterministic sort order of PHIs for identical instructions (authored by mgrang).
Changed prior to commit:
https://reviews.llvm.org/D39410?vs=120764&id=120874#toc
Repository:
rL LLVM
https://reviews.llvm.org/D39410
Files:
llvm/trunk/lib/Transforms/Scalar/GVNHoist.cpp
Index: llvm/trunk/lib/Transforms/Scalar/GVNHoist.cpp
===================================================================
--- llvm/trunk/lib/Transforms/Scalar/GVNHoist.cpp
+++ llvm/trunk/lib/Transforms/Scalar/GVNHoist.cpp
@@ -703,7 +703,7 @@
// Vector of PHIs contains PHIs for different instructions.
// Sort the args according to their VNs, such that identical
// instructions are together.
- std::sort(CHIs.begin(), CHIs.end(), cmpVN);
+ std::stable_sort(CHIs.begin(), CHIs.end(), cmpVN);
auto TI = BB->getTerminator();
auto B = CHIs.begin();
// [PreIt, PHIIt) form a range of CHIs which have identical VNs.
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