[PATCH] D28694: Add loop pass insertion point EP_LateLoopOptimizations

Krzysztof Parzyszek via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Fri Jan 20 11:00:55 PST 2017

kparzysz updated this revision to Diff 85160.
kparzysz retitled this revision from "Add pass insertion point EP_BeforeLoopIdiom" to "Add loop pass insertion point EP_LateLoopOptimizations".
kparzysz edited the summary of this revision.
kparzysz added a comment.

Isolated the extension point alone in this patch.




Index: lib/Transforms/IPO/PassManagerBuilder.cpp
--- lib/Transforms/IPO/PassManagerBuilder.cpp
+++ lib/Transforms/IPO/PassManagerBuilder.cpp
@@ -316,7 +316,9 @@
   MPM.add(createIndVarSimplifyPass());        // Canonicalize indvars
   MPM.add(createLoopIdiomPass());             // Recognize idioms like memset.
+  addExtensionsToPM(EP_LateLoopOptimizations, MPM);
   MPM.add(createLoopDeletionPass());          // Delete dead loops
   if (EnableLoopInterchange) {
     MPM.add(createLoopInterchangePass()); // Interchange loops
Index: include/llvm/Transforms/IPO/PassManagerBuilder.h
--- include/llvm/Transforms/IPO/PassManagerBuilder.h
+++ include/llvm/Transforms/IPO/PassManagerBuilder.h
@@ -100,6 +100,14 @@
     /// will be inserted after each instance of the instruction combiner pass.
+    /// EP_LateLoopOptimizations - This extension point allows adding late loop
+    /// canonicalization and simplification passes. This is the last point in
+    /// the loop optimization pipeline before loop deletion. Each pass added
+    /// here must be an instance of LoopPass.
+    /// This is the place to add passes that can remove loops, such as target-
+    /// specific loop idiom recognition.
+    EP_LateLoopOptimizations,
     /// EP_CGSCCOptimizerLate - This extension point allows adding CallGraphSCC
     /// passes at the end of the main CallGraphSCC passes and before any
     /// function simplification passes run by CGPassManager.

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