[PATCH] D23163: [AVX512][FastISel] Do not use K registers in TEST instructions

[Elena Demikhovsky via llvm-commits]

delena added inline comments.

================
Comment at: lib/Target/X86/X86FastISel.cpp:1694
@@ +1693,3 @@
+  // TEST instruction.
+  if (MRI.getRegClass(OpReg) == &X86::VK1RegClass) {
+    unsigned tmp = OpReg;
----------------
It may give incorrect result. If the OpReg is k-reg you can use k-shitft-left 15 with ktestw.


https://reviews.llvm.org/D23163