[PowerPC] Add a regression test for r225251

In r225251, I removed an old entry from the README.txt file. While there are
several contributing factors (including pieces in Clang's ABI code), upon
further reflection, the backend part deserves a regression test.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225268 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/PowerPC/arr-fp-arg-no-copy.ll b/test/CodeGen/PowerPC/arr-fp-arg-no-copy.ll
new file mode 100644 (file)
index 0000000..fd430a6
--- /dev/null
+++ b/test/CodeGen/PowerPC/arr-fp-arg-no-copy.ll
@@ -0,0 +1,23 @@
+; RUN: llc -mcpu=ppc64 < %s | FileCheck %s
+target datalayout = "E-m:e-i64:64-n32:64"
+target triple = "powerpc64-unknown-linux-gnu"
+
+; Function Attrs: nounwind
+define void @bar() #0 {
+entry:
+  tail call void @xxx([2 x i64] [i64 4607182418800017408, i64 4611686018427387904]) #0
+  ret void
+
+; CHECK-LABEL: @bar
+; CHECK-DAG: li [[REG1:[0-9]+]], 1023
+; CHECK-DAG: li [[REG2:[0-9]+]], {{1$}}
+; CHECK-DAG: sldi 3, [[REG1]], 52
+; CHECK-DAG: sldi 4, [[REG2]], 62
+; CHECK: bl xxx
+; CHECK: blr
+}
+
+declare void @xxx([2 x i64])
+
+attributes #0 = { nounwind }
+