Revert "[IR] Initial introduction of llvm.experimental.memset_pattern (#97583)"

This reverts commit 7ff3a9acd84654c9ec2939f45ba27f162ae7fbc3.

Recent scheduling changes means tests need to be re-generated. Reverting
to green while I do that.

3 files changed, 1 insertions, 19 deletions

diff --git a/llvm/lib/CodeGen/PreISelIntrinsicLowering.cpp b/llvm/lib/CodeGen/PreISelIntrinsicLowering.cpp
index 4a3d167..3373b76e 100644
--- a/llvm/lib/CodeGen/PreISelIntrinsicLowering.cpp
+++ b/llvm/lib/CodeGen/PreISelIntrinsicLowering.cpp
@@ -320,13 +320,6 @@ bool PreISelIntrinsicLowering::expandMemIntrinsicUses(Function &F) const {
       Memset->eraseFromParent();
       break;
     }
-    case Intrinsic::experimental_memset_pattern: {
-      auto *Memset = cast<MemSetPatternInst>(Inst);
-      expandMemSetPatternAsLoop(Memset);
-      Changed = true;
-      Memset->eraseFromParent();
-      break;
-    }
     default:
       llvm_unreachable("unhandled intrinsic");
     }
@@ -346,7 +339,6 @@ bool PreISelIntrinsicLowering::lowerIntrinsics(Module &M) const {
     case Intrinsic::memmove:
     case Intrinsic::memset:
     case Intrinsic::memset_inline:
-    case Intrinsic::experimental_memset_pattern:
       Changed |= expandMemIntrinsicUses(F);
       break;
     case Intrinsic::load_relative:
diff --git a/llvm/lib/IR/Verifier.cpp b/llvm/lib/IR/Verifier.cpp
index 6ee0a5a..24e7b48 100644
--- a/llvm/lib/IR/Verifier.cpp
+++ b/llvm/lib/IR/Verifier.cpp
@@ -5519,8 +5519,7 @@ void Verifier::visitIntrinsicCall(Intrinsic::ID ID, CallBase &Call) {
   case Intrinsic::memcpy_inline:
   case Intrinsic::memmove:
   case Intrinsic::memset:
-  case Intrinsic::memset_inline:
-  case Intrinsic::experimental_memset_pattern: {
+  case Intrinsic::memset_inline: {
     break;
   }
   case Intrinsic::memcpy_element_unordered_atomic:
diff --git a/llvm/lib/Transforms/Utils/LowerMemIntrinsics.cpp b/llvm/lib/Transforms/Utils/LowerMemIntrinsics.cpp
index 91291b4..5462170 100644
--- a/llvm/lib/Transforms/Utils/LowerMemIntrinsics.cpp
+++ b/llvm/lib/Transforms/Utils/LowerMemIntrinsics.cpp
@@ -970,15 +970,6 @@ void llvm::expandMemSetAsLoop(MemSetInst *Memset) {
                    Memset->isVolatile());
 }
 
-void llvm::expandMemSetPatternAsLoop(MemSetPatternInst *Memset) {
-  createMemSetLoop(/* InsertBefore=*/Memset,
-                   /* DstAddr=*/Memset->getRawDest(),
-                   /* CopyLen=*/Memset->getLength(),
-                   /* SetValue=*/Memset->getValue(),
-                   /* Alignment=*/Memset->getDestAlign().valueOrOne(),
-                   Memset->isVolatile());
-}
-
 void llvm::expandAtomicMemCpyAsLoop(AtomicMemCpyInst *AtomicMemcpy,
                                     const TargetTransformInfo &TTI,
                                     ScalarEvolution *SE) {