[ConstantFolding] Combine an if statement into an earlier one that checked the same condition. NFC

llvm-svn: 304681

1 files changed, 3 insertions, 7 deletions

diff --git a/llvm/lib/Analysis/ConstantFolding.cpp b/llvm/lib/Analysis/ConstantFolding.cpp
index 4267ed24e9f..8170c38afb7 100644
--- a/llvm/lib/Analysis/ConstantFolding.cpp
+++ b/llvm/lib/Analysis/ConstantFolding.cpp
@@ -1584,6 +1584,9 @@ Constant *ConstantFoldScalarCall(StringRef Name, unsigned IntrinsicID, Type *Ty,
       // cosine(arg) is between -1 and 1. cosine(invalid arg) is NaN
       if (IntrinsicID == Intrinsic::cos)
         return Constant::getNullValue(Ty);
+      if (IntrinsicID == Intrinsic::bswap ||
+          IntrinsicID == Intrinsic::bitreverse)
+        return Operands[0];
     }
     if (auto *Op = dyn_cast<ConstantFP>(Operands[0])) {
       if (IntrinsicID == Intrinsic::convert_to_fp16) {
@@ -1828,13 +1831,6 @@ Constant *ConstantFoldScalarCall(StringRef Name, unsigned IntrinsicID, Type *Ty,
       }
     }
 
-    if (isa<UndefValue>(Operands[0])) {
-      if (IntrinsicID == Intrinsic::bswap ||
-          IntrinsicID == Intrinsic::bitreverse)
-        return Operands[0];
-      return nullptr;
-    }
-
     return nullptr;
   }