[llvm] fc7c79b - [X86] hasBZHI - simplify to a basic check as there's no need for a switch statement. NFCI.

[Simon Pilgrim via llvm-commits]

Author: Simon Pilgrim
Date: 2024-01-30T15:32:06Z
New Revision: fc7c79b60ca0846f1cc916b6b04eedd1fc21537e

URL: https://github.com/llvm/llvm-project/commit/fc7c79b60ca0846f1cc916b6b04eedd1fc21537e
DIFF: https://github.com/llvm/llvm-project/commit/fc7c79b60ca0846f1cc916b6b04eedd1fc21537e.diff

LOG: [X86] hasBZHI - simplify to a basic check as there's no need for a switch statement. NFCI.

Added: 
    

Modified: 
    llvm/lib/Target/X86/X86ISelLowering.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 89dd7f67ea9c1..531e00862558c 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -48331,14 +48331,8 @@ static SDValue getIndexFromUnindexedLoad(LoadSDNode *Ld) {
 }
 
 static bool hasBZHI(const X86Subtarget &Subtarget, MVT VT) {
-  if (Subtarget.hasBMI2() && VT.isScalarInteger()) {
-    switch (VT.getSizeInBits()) {
-    default: return false;
-    case 64: return Subtarget.is64Bit() ? true : false;
-    case 32: return true;
-    }
-  }
-  return false;
+  return Subtarget.hasBMI2() &&
+         (VT == MVT::i32 || (VT == MVT::i64 && Subtarget.is64Bit()));
 }
 
 // This function recognizes cases where X86 bzhi instruction can replace and