[llvm] r324404 - [AArch64] add test to show sub-optimal isel; NFC

[Sanjay Patel via llvm-commits]

Author: spatel
Date: Tue Feb  6 13:25:02 2018
New Revision: 324404

URL: http://llvm.org/viewvc/llvm-project?rev=324404&view=rev
Log:
[AArch64] add test to show sub-optimal isel; NFC

Added:
    llvm/trunk/test/CodeGen/AArch64/sub1.ll

Added: llvm/trunk/test/CodeGen/AArch64/sub1.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/AArch64/sub1.ll?rev=324404&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/AArch64/sub1.ll (added)
+++ llvm/trunk/test/CodeGen/AArch64/sub1.ll Tue Feb  6 13:25:02 2018
@@ -0,0 +1,17 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=aarch64-unknown-unknown | FileCheck %s
+
+define i64 @sub1_disguised_constant(i64 %x) {
+; CHECK-LABEL: sub1_disguised_constant:
+; CHECK:       // %bb.0:
+; CHECK-NEXT:    orr w8, wzr, #0xffff
+; CHECK-NEXT:    add w8, w0, w8
+; CHECK-NEXT:    and w8, w0, w8
+; CHECK-NEXT:    and x0, x8, #0xffff
+; CHECK-NEXT:    ret
+  %a1 = and i64 %x, 65535
+  %a2 = add i64 %x, 65535
+  %r = and i64 %a1, %a2
+  ret i64 %r
+}
+