diff --git a/llvm/lib/Target/X86/X86LegalizerInfo.cpp b/llvm/lib/Target/X86/X86LegalizerInfo.cpp
--- a/llvm/lib/Target/X86/X86LegalizerInfo.cpp
+++ b/llvm/lib/Target/X86/X86LegalizerInfo.cpp
@@ -105,7 +105,7 @@
       .clampScalar(0, s32, s64);
 
     if (Subtarget.hasPOPCNT()) {
-      // popcount
+      // popcount (POPCNT)
       getActionDefinitionsBuilder(G_CTPOP)
         .legalFor({{s16, s16}, {s32, s32}, {s64, s64}})
         .widenScalarToNextPow2(1, /*Min=*/16)
diff --git a/llvm/test/CodeGen/X86/GlobalISel/legalize-bswap.mir b/llvm/test/CodeGen/X86/GlobalISel/legalize-bswap.mir
--- a/llvm/test/CodeGen/X86/GlobalISel/legalize-bswap.mir
+++ b/llvm/test/CodeGen/X86/GlobalISel/legalize-bswap.mir
@@ -2,7 +2,7 @@
 # RUN: llc -mtriple=x86_64-linux-gnu -run-pass=legalizer %s -o - | FileCheck %s --check-prefix=X86-64
 # RUN: llc -mtriple=i386-linux-gnu -run-pass=legalizer %s -o - | FileCheck %s --check-prefix=X86-32
 
-# test BSWAP s16, s32, and s64
+# test BSWAP s16, s17, s32, and s64
 
 ...
 ---