Fix Vector256.Create(0,0,0..,C,C,C..) lowered to Vector256.Zero always

EgorBo · Jan 20, 2021 · 1809af6 · 1809af6
1 parent c4421ac
commit 1809af6
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/coreclr/jit/lowerxarch.cpp b/src/coreclr/jit/lowerxarch.cpp
@@ -1518,7 +1518,7 @@ void Lowering::LowerHWIntrinsicCreate(GenTreeHWIntrinsic* node)
         assert((simdSize == 8) || (simdSize == 12) || (simdSize == 16) || (simdSize == 32));
 
         if ((argCnt == 1) ||
-            ((vecCns.i64[0] == vecCns.i64[1]) && ((simdSize <= 16) || (vecCns.i64[2] == vecCns.i64[3]))))
+            ((vecCns.i64[0] == vecCns.i64[1]) && ((simdSize <= 16) || ((vecCns.i64[0] == vecCns.i64[2]) && (vecCns.i64[2] == vecCns.i64[3])))))
         {
             // If we are a single constant or if all parts are the same, we might be able to optimize
             // this even further for certain values, such as Zero or AllBitsSet.