[llvm] c49611f - Mark CFG as preserved in TypePromotion and InterleaveAccess passes

[David Green via llvm-commits]

Author: David Green
Date: 2021-09-22T18:58:00+01:00
New Revision: c49611f9097899e51a91ddc71eb295486f5271ea

URL: https://github.com/llvm/llvm-project/commit/c49611f9097899e51a91ddc71eb295486f5271ea
DIFF: https://github.com/llvm/llvm-project/commit/c49611f9097899e51a91ddc71eb295486f5271ea.diff

LOG: Mark CFG as preserved in TypePromotion and InterleaveAccess passes

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

Differential Revision: https://reviews.llvm.org/D110161

Added: 
    

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

Removed: 
    


################################################################################
diff  --git a/llvm/lib/CodeGen/InterleavedAccessPass.cpp b/llvm/lib/CodeGen/InterleavedAccessPass.cpp
index 24a57cc21c57..5a20580e5479 100644
--- a/llvm/lib/CodeGen/InterleavedAccessPass.cpp
+++ b/llvm/lib/CodeGen/InterleavedAccessPass.cpp
@@ -95,7 +95,7 @@ class InterleavedAccess : public FunctionPass {
 
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<DominatorTreeWrapperPass>();
-    AU.addPreserved<DominatorTreeWrapperPass>();
+    AU.setPreservesCFG();
   }
 
 private:

diff  --git a/llvm/lib/CodeGen/TypePromotion.cpp b/llvm/lib/CodeGen/TypePromotion.cpp
index f50b96921c21..df4d71b8f167 100644
--- a/llvm/lib/CodeGen/TypePromotion.cpp
+++ b/llvm/lib/CodeGen/TypePromotion.cpp
@@ -183,6 +183,7 @@ class TypePromotion : public FunctionPass {
   void getAnalysisUsage(AnalysisUsage &AU) const override {
     AU.addRequired<TargetTransformInfoWrapperPass>();
     AU.addRequired<TargetPassConfig>();
+    AU.setPreservesCFG();
   }
 
   StringRef getPassName() const override { return PASS_NAME; }

diff  --git a/llvm/test/CodeGen/ARM/O3-pipeline.ll b/llvm/test/CodeGen/ARM/O3-pipeline.ll
index 2a5ba7653da9..885632838a83 100644
--- a/llvm/test/CodeGen/ARM/O3-pipeline.ll
+++ b/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