[PATCH] D110161: [TypePromotion][InterleaveAccess] Mark CFG as preserved in TypePromotion and InterleaveAccess passes

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: avieira, SjoerdMeijer, samparker, NickGuy.
Herald added a subscriber: hiraditya.
dmgreen requested review of this revision.
Herald added a project: LLVM.

Neither of these passes modify the CFG, allowing us to preserve DomTree and LoopInfo across them by using setPreservesCFG.


https://reviews.llvm.org/D110161

Files:
  llvm/lib/CodeGen/InterleavedAccessPass.cpp
  llvm/lib/CodeGen/TypePromotion.cpp
  llvm/test/CodeGen/ARM/O3-pipeline.ll


Index: llvm/test/CodeGen/ARM/O3-pipeline.ll
===================================================================
--- llvm/test/CodeGen/ARM/O3-pipeline.ll
+++ llvm/test/CodeGen/ARM/O3-pipeline.ll
@@ -47,8 +47,6 @@
 ; CHECK-NEXT:      Transform functions to use DSP intrinsics
 ; CHECK-NEXT:      Interleaved Access Pass
 ; CHECK-NEXT:      Type Promotion
-; CHECK-NEXT:      Dominator Tree Construction
-; CHECK-NEXT:      Natural Loop Information
 ; CHECK-NEXT:      CodeGen Prepare
 ; CHECK-NEXT:      Dominator Tree Construction
 ; CHECK-NEXT:      Exception handling preparation
Index: llvm/lib/CodeGen/TypePromotion.cpp
===================================================================
--- llvm/lib/CodeGen/TypePromotion.cpp
+++ llvm/lib/CodeGen/TypePromotion.cpp
@@ -183,6 +183,7 @@
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<TargetTransformInfoWrapperPass>();
     AU.addRequired<TargetPassConfig>();
+    AU.setPreservesCFG();
   }
 
   StringRef getPassName() const override { return PASS_NAME; }
Index: llvm/lib/CodeGen/InterleavedAccessPass.cpp
===================================================================
--- llvm/lib/CodeGen/InterleavedAccessPass.cpp
+++ llvm/lib/CodeGen/InterleavedAccessPass.cpp
@@ -95,7 +95,7 @@
 
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<DominatorTreeWrapperPass>();
-    AU.addPreserved<DominatorTreeWrapperPass>();
+    AU.setPreservesCFG();
   }
 
 private:


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D110161.373879.patch
Type: text/x-patch
Size: 1480 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20210921/1aa389dd/attachment.bin>