Index: llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
===================================================================
--- llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
+++ llvm/lib/Target/AMDGPU/AMDGPUISelLowering.cpp
@@ -5016,7 +5016,7 @@
         SelBits *= 8;
         Known.One |= ((RHSKnown.One.getZExtValue() >> SelBits) & 0xff) << I;
         Known.Zero |= ((RHSKnown.Zero.getZExtValue() >> SelBits) & 0xff) << I;
-      } else if (SelBits < 7) {
+      } else if (SelBits < 8) {
         SelBits = (SelBits & 3) * 8;
         Known.One |= ((LHSKnown.One.getZExtValue() >> SelBits) & 0xff) << I;
         Known.Zero |= ((LHSKnown.Zero.getZExtValue() >> SelBits) & 0xff) << I;