[PowerPC] Add test for failing lowering llvm.ppc.cfence on i128. NFC.

diff --git a/llvm/test/CodeGen/PowerPC/cfence-i128.ll b/llvm/test/CodeGen/PowerPC/cfence-i128.ll
new file mode 100644 (file)
index 0000000..6775415
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/cfence-i128.ll
@@ -0,0 +1,15 @@
+; REQUIRES: asserts
+; RUN: not --crash llc -verify-machineinstrs -mtriple=powerpc64-unknown-unknown \
+; RUN:   < %s 2>&1 | FileCheck %s
+
+declare void @llvm.ppc.sync()
+declare void @llvm.ppc.cfence.i128(i128)
+
+define void @test_cfence(i128 %src) {
+entry:
+  call void @llvm.ppc.sync()
+; CHECK: ExpandIntegerOperand Op{{.*}}llvm.ppc.cfence
+; CHECK: LLVM ERROR: Do not know how to expand this operator's operand!
+  call void @llvm.ppc.cfence.i128(i128 %src)
+  ret void
+}