[GIsel] Update a comment and make it more precise.

This only covers ANYEXT/ZEXT. SEXT is covered in another test
I just checked in.

diff --git a/llvm/test/CodeGen/AArch64/GlobalISel/combine-ext-debugloc.mir b/llvm/test/CodeGen/AArch64/GlobalISel/combine-ext-debugloc.mir
index 7f02d1e..d03c6f3 100644 (file)
--- a/llvm/test/CodeGen/AArch64/GlobalISel/combine-ext-debugloc.mir
+++ b/llvm/test/CodeGen/AArch64/GlobalISel/combine-ext-debugloc.mir
@@ -1,6 +1,6 @@
 # RUN: llc -O0 -verify-machineinstrs -mtriple aarch64-- -run-pass=legalizer %s -o - | FileCheck %s
 
-# Check that when we combine SEXT/ZEXT/ANYEXT we assign the correct location.
+# Check that when we combine ZEXT/ANYEXT we assign the correct location.
 # CHECK: !8 = !DILocation(line: 23, column: 5, scope: !4)
 # CHECK:  G_AND %16, %15, debug-location !8