[PATCH] D10593: [X86][AVX] Add support for shuffle decoding of vperm2f128/vperm2i128 with zero'd lanes

[Sanjay Patel]

================
Comment at: lib/Target/X86/X86ISelLowering.cpp:4455
@@ -4453,1 +4454,3 @@
     if (Mask.empty()) return false;
+    // Mask only contains -ve index if an element is zero.
+    if (std::any_of(Mask.begin(), Mask.end(), [](int M){ return M < 0; }))
----------------
-ve ?

================
Comment at: lib/Target/X86/X86ISelLowering.cpp:4456
@@ +4455,3 @@
+    // Mask only contains -ve index if an element is zero.
+    if (std::any_of(Mask.begin(), Mask.end(), [](int M){ return M < 0; }))
+      return false;
----------------
Should this check be:
  M == SM_SentinelZero


Repository:
  rL LLVM

http://reviews.llvm.org/D10593