[llvm] 5983cfd - [X86] LowerRotate - fix assertion. NFC.

[Simon Pilgrim via llvm-commits]

Author: Simon Pilgrim
Date: 2021-12-06T19:46:22Z
New Revision: 5983cfdc50b3110e3e6856d174e54147f2f6e6e3

URL: https://github.com/llvm/llvm-project/commit/5983cfdc50b3110e3e6856d174e54147f2f6e6e3
DIFF: https://github.com/llvm/llvm-project/commit/5983cfdc50b3110e3e6856d174e54147f2f6e6e3.diff

LOG: [X86] LowerRotate - fix assertion. NFC.

v32i16 rotation lowering is only lowered on non-BWI targets.

Added: 
    

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

Removed: 
    


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diff  --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index f412292dfd071..660cf626946ba 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -29844,9 +29844,9 @@ static SDValue LowerRotate(SDValue Op, const X86Subtarget &Subtarget,
     return splitVectorIntBinary(Op, DAG);
 
   assert((VT == MVT::v4i32 || VT == MVT::v8i16 || VT == MVT::v16i8 ||
-          ((VT == MVT::v8i32 || VT == MVT::v16i16 || VT == MVT::v32i8 ||
-            VT == MVT::v32i16) &&
-           Subtarget.hasAVX2())) &&
+          ((VT == MVT::v8i32 || VT == MVT::v16i16 || VT == MVT::v32i8) &&
+           Subtarget.hasAVX2()) ||
+          (VT == MVT::v32i16 && !Subtarget.useBWIRegs())) &&
          "Only vXi32/vXi16/vXi8 vector rotates supported");
 
   // Rotate by an uniform constant - expand back to shifts.