[PATCH] D121922: Reland "Use a stable-sort when combining bases"

[Sterling Augustine via Phabricator via llvm-commits]

This revision was not accepted when it landed; it landed in state "Needs Review".
This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rGbd38234d7603: Reland "Use a stable-sort when combining bases" (authored by saugustine).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D121922/new/

https://reviews.llvm.org/D121922

Files:
  llvm/lib/Target/ARM/ARMISelLowering.cpp


Index: llvm/lib/Target/ARM/ARMISelLowering.cpp
===================================================================
--- llvm/lib/Target/ARM/ARMISelLowering.cpp
+++ llvm/lib/Target/ARM/ARMISelLowering.cpp
@@ -15977,10 +15977,10 @@
   // Try to fold with other users. Non-constant updates are considered
   // first, and constant updates are sorted to not break a sequence of
   // strided accesses (if there is any).
-  std::sort(BaseUpdates.begin(), BaseUpdates.end(),
-            [](BaseUpdateUser &LHS, BaseUpdateUser &RHS) {
-              return LHS.ConstInc < RHS.ConstInc;
-            });
+  std::stable_sort(BaseUpdates.begin(), BaseUpdates.end(),
+                   [](const BaseUpdateUser &LHS, const BaseUpdateUser &RHS) {
+                     return LHS.ConstInc < RHS.ConstInc;
+                   });
   for (BaseUpdateUser &User : BaseUpdates) {
     if (TryCombineBaseUpdate(Target, User, /*SimpleConstIncOnly=*/false, DCI))
       return SDValue();


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