[llvm] b5c4456 - [InstCombine] Remove redundant folds in foldCastedBitwiseLogic() (NFCI)

[Nikita Popov via llvm-commits]

Author: Nikita Popov
Date: 2023-10-24T17:06:39+02:00
New Revision: b5c44564e55e93321e224937b817a40d69de59fd

URL: https://github.com/llvm/llvm-project/commit/b5c44564e55e93321e224937b817a40d69de59fd
DIFF: https://github.com/llvm/llvm-project/commit/b5c44564e55e93321e224937b817a40d69de59fd.diff

LOG: [InstCombine] Remove redundant folds in foldCastedBitwiseLogic() (NFCI)

The vector sext limitation the comment talks about has been removed
a long time ago, in https://reviews.llvm.org/D36213.

Added: 
    

Modified: 
    llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp b/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
index cedd8f47fe651f2..42734c42750f30e 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
@@ -1765,29 +1765,6 @@ Instruction *InstCombinerImpl::foldCastedBitwiseLogic(BinaryOperator &I) {
     return CastInst::Create(CastOpcode, NewOp, DestTy);
   }
 
-  // For now, only 'and'/'or' have optimizations after this.
-  if (LogicOpc == Instruction::Xor)
-    return nullptr;
-
-  // If this is logic(cast(icmp), cast(icmp)), try to fold this even if the
-  // cast is otherwise not optimizable.  This happens for vector sexts.
-  ICmpInst *ICmp0 = dyn_cast<ICmpInst>(Cast0Src);
-  ICmpInst *ICmp1 = dyn_cast<ICmpInst>(Cast1Src);
-  if (ICmp0 && ICmp1) {
-    if (Value *Res =
-            foldAndOrOfICmps(ICmp0, ICmp1, I, LogicOpc == Instruction::And))
-      return CastInst::Create(CastOpcode, Res, DestTy);
-    return nullptr;
-  }
-
-  // If this is logic(cast(fcmp), cast(fcmp)), try to fold this even if the
-  // cast is otherwise not optimizable.  This happens for vector sexts.
-  FCmpInst *FCmp0 = dyn_cast<FCmpInst>(Cast0Src);
-  FCmpInst *FCmp1 = dyn_cast<FCmpInst>(Cast1Src);
-  if (FCmp0 && FCmp1)
-    if (Value *R = foldLogicOfFCmps(FCmp0, FCmp1, LogicOpc == Instruction::And))
-      return CastInst::Create(CastOpcode, R, DestTy);
-
   return nullptr;
 }