From: Florian Hahn <flo@fhahn.com>
Date: Wed, 9 Jan 2019 21:04:36 +0000 (+0000)
Subject: [AArch64] Add test for constant shrinking with multiple users (NFC).
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=2c1ba43178da4f207db2857a171962e7847a5d06;p=llvm

[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 00000000000..d787d3696c1
--- /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)