From 30a0dbb70d9e0c94a9bdc3d28e7c1c57d9891912 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper@intel.com>
Date: Thu, 30 Jul 2020 21:50:17 -0700
Subject: [PATCH] [X86] Remove x86_sse42_crc32_64_64 from
 X86TTIImpl::simplifyDemandedUseBitsIntrinsic

It doesn't do any simplifying. It just computes known bits. We
can just let InstCombine call computeKnownBits which will handle
this just as well.
---
 llvm/lib/Target/X86/X86InstCombineIntrinsic.cpp | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/llvm/lib/Target/X86/X86InstCombineIntrinsic.cpp b/llvm/lib/Target/X86/X86InstCombineIntrinsic.cpp
index 91341f9..aea355a 100644
--- a/llvm/lib/Target/X86/X86InstCombineIntrinsic.cpp
+++ b/llvm/lib/Target/X86/X86InstCombineIntrinsic.cpp
@@ -1785,10 +1785,6 @@ Optional<Value *> X86TTIImpl::simplifyDemandedUseBitsIntrinsic(
     KnownBitsComputed = true;
     break;
   }
-  case Intrinsic::x86_sse42_crc32_64_64:
-    Known.Zero.setBitsFrom(32);
-    KnownBitsComputed = true;
-    break;
   }
   return None;
 }
-- 
2.7.4