fix-merge-MergeFunctions-scheduling

===================================================================

Gbp-Pq: Name fix-merge-MergeFunctions-scheduling.diff

diff --git a/llvm/lib/Passes/PassBuilder.cpp b/llvm/lib/Passes/PassBuilder.cpp
index 0bc955dbbfea321c8a8f3f5c7e875fe126ba4dd8..bf9f05d3098f4de932b48702978e28fae099e865 100644 (file)
--- a/llvm/lib/Passes/PassBuilder.cpp
+++ b/llvm/lib/Passes/PassBuilder.cpp
@@ -1416,23 +1416,6 @@ PassBuilder::buildModuleOptimizationPipeline(OptimizationLevel Level,
 
   addVectorPasses(Level, OptimizePM, /* IsFullLTO */ false);
 
-  // Split out cold code. Splitting is done late to avoid hiding context from
-  // other optimizations and inadvertently regressing performance. The tradeoff
-  // is that this has a higher code size cost than splitting early.
-  if (EnableHotColdSplit && !LTOPreLink)
-    MPM.addPass(HotColdSplittingPass());
-
-  // Search the code for similar regions of code. If enough similar regions can
-  // be found where extracting the regions into their own function will decrease
-  // the size of the program, we extract the regions, a deduplicate the
-  // structurally similar regions.
-  if (EnableIROutliner)
-    MPM.addPass(IROutlinerPass());
-
-  // Merge functions if requested.
-  if (PTO.MergeFunctions)
-    MPM.addPass(MergeFunctionsPass());
-
   // LoopSink pass sinks instructions hoisted by LICM, which serves as a
   // canonicalization pass that enables other optimizations. As a result,
   // LoopSink pass needs to be a very late IR pass to avoid undoing LICM
@@ -1459,6 +1442,23 @@ PassBuilder::buildModuleOptimizationPipeline(OptimizationLevel Level,
   for (auto &C : OptimizerLastEPCallbacks)
     C(MPM, Level);
 
+  // Split out cold code. Splitting is done late to avoid hiding context from
+  // other optimizations and inadvertently regressing performance. The tradeoff
+  // is that this has a higher code size cost than splitting early.
+  if (EnableHotColdSplit && !LTOPreLink)
+    MPM.addPass(HotColdSplittingPass());
+
+  // Search the code for similar regions of code. If enough similar regions can
+  // be found where extracting the regions into their own function will decrease
+  // the size of the program, we extract the regions, a deduplicate the
+  // structurally similar regions.
+  if (EnableIROutliner)
+    MPM.addPass(IROutlinerPass());
+
+  // Merge functions if requested.
+  if (PTO.MergeFunctions)
+    MPM.addPass(MergeFunctionsPass());
+
   if (PTO.CallGraphProfile)
     MPM.addPass(CGProfilePass());