[NFC][PowerPC] Add a new test case loop-comment.ll
diff --git a/llvm/test/CodeGen/PowerPC/loop-comment.ll b/llvm/test/CodeGen/PowerPC/loop-comment.ll
new file mode 100644
index 0000000..b33d62b
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/loop-comment.ll
@@ -0,0 +1,21 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc -mtriple=powerpc64le-linux-gnu < %s | FileCheck %s -check-prefix=PPC64LE
+
+define void @test(i8* %ptr, i8 %cmp, i8 %val) {
+; PPC64LE-LABEL: test:
+; PPC64LE: # %bb.0:
+; PPC64LE-NEXT: rlwinm 4, 4, 0, 24, 31
+; PPC64LE-NEXT: .LBB0_1: #
+; PPC64LE-NEXT: lbarx 6, 0, 3
+; PPC64LE-NEXT: cmpw 4, 6
+; PPC64LE-NEXT: bne 0, .LBB0_3
+; PPC64LE-NEXT: # %bb.2: #
+; PPC64LE-NEXT: stbcx. 5, 0, 3
+; PPC64LE-NEXT: beqlr 0
+; PPC64LE-NEXT: b .LBB0_1
+; PPC64LE-NEXT: .LBB0_3:
+; PPC64LE-NEXT: stbcx. 6, 0, 3
+; PPC64LE-NEXT: blr
+ %res = cmpxchg i8* %ptr, i8 %cmp, i8 %val monotonic monotonic
+ ret void
+}
