[llvm] Change check for embedded llvm version number to a regex to make test more flexible. (PR #79528)

[via llvm-commits]

https://github.com/dyung created https://github.com/llvm/llvm-project/pull/79528

This test started to fail when LLVM created the release/18.x branch and the main branch subsequently had the version number increased from 18 to 19.

I investigated this failure (it was blocking our internal automation) and discovered that the CHECK statement on line 27 seemed to have the compiler version number (1800) encoded in octal that it was checking for. I don't know if this is something that explicitly needs to be checked, so I am leaving it in, but it should be more flexible so the test doesn't fail anytime the version number is changed. To accomplish that, I changed the check for the 4-digit version number to be a regex.

I originally updated this test for the 18->19 transition in a01195ff5cc3d7fd084743b1f47007645bb385f4. This change makes the CHECK line more flexible so it doesn't need to be continually updated.

>From c0810ce43e14085849ce7cd07e28c7944c47246d Mon Sep 17 00:00:00 2001
From: Douglas Yung <douglas.yung at sony.com>
Date: Thu, 25 Jan 2024 16:25:30 -0800
Subject: [PATCH] Change check for embedded llvm version number to a regex to
 make test more flexible.

---
 llvm/test/CodeGen/SystemZ/zos-ppa2.ll | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/llvm/test/CodeGen/SystemZ/zos-ppa2.ll b/llvm/test/CodeGen/SystemZ/zos-ppa2.ll
index 2a686563388a47..60580aeb6d83cc 100644
--- a/llvm/test/CodeGen/SystemZ/zos-ppa2.ll
+++ b/llvm/test/CodeGen/SystemZ/zos-ppa2.ll
@@ -24,7 +24,7 @@
 ; CHECK:    .byte   0
 ; CHECK:    .byte   3
 ; CHECK:    .short  30
-; CHECK:    .ascii  "\323\323\345\324@@@@@@\361\371\360\360\361\371\367\360\360\361\360\361\360\360\360\360\360\360\360\360"
+; CHECK:    .ascii  "\323\323\345\324@@@@@@{{((\\3[0-7]{2}){4})}}\361\371\367\360\360\361\360\361\360\360\360\360\360\360\360\360"
 define void @void_test() {
 entry:
   ret void