[AArch64] Add test for constant shrinking with multiple users (NFC).
Test to avoid regression fixed by rL350684.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@350762 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/AArch64/shrink-constant-multiple-users.ll b/test/CodeGen/AArch64/shrink-constant-multiple-users.ll
new file mode 100644
index 0000000..d787d36
--- /dev/null
+++ b/test/CodeGen/AArch64/shrink-constant-multiple-users.ll
@@ -0,0 +1,18 @@
+; RUN: llc -mtriple arm64-ios- %s -o - | FileCheck %s
+
+; Check the -8 constant is shrunk if there are multiple users of the AND instruction.
+
+; CHECK-LABEL: _test:
+; CHECK: and x0, x0, #0xfffffff8
+; CHECK-NEXT: add x19, x0, #10
+; CHECK-NEXT: bl _user
+
+define i64 @test(i32 %a) {
+ %ext = zext i32 %a to i64
+ %v1 = and i64 %ext, -8
+ %v2 = add i64 %v1, 10
+ call void @user(i64 %v1)
+ ret i64 %v2
+}
+
+declare void @user(i64)
