[x86] restore test comment; NFC
The description got deleted along with the FIXME note in
rL334268.
llvm-svn: 334288
diff --git a/llvm/test/CodeGen/X86/backpropmask.ll b/llvm/test/CodeGen/X86/backpropmask.ll
index f162c18..50d43f6 100644
--- a/llvm/test/CodeGen/X86/backpropmask.ll
+++ b/llvm/test/CodeGen/X86/backpropmask.ll
@@ -1,6 +1,10 @@
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=x86_64-unknown-unknown < %s | FileCheck %s
+; Verify that backwards propagation of a mask does not affect
+; nodes with multiple result values. In both tests, the stored
+; 32-bit value should be masked to an 8-bit number (and 255).
+
@b = local_unnamed_addr global i32 918, align 4
@d = local_unnamed_addr global i32 8089, align 4
@c = common local_unnamed_addr global i32 0, align 4