[llvm] [NFC] update gfx12 vop test to use sed instead of grep (PR #120458)

[Mark Danial via llvm-commits]

https://github.com/madanial0 created https://github.com/llvm/llvm-project/pull/120458

changes from https://github.com/llvm/llvm-project/pull/119778 breaks the AIX clang ppc64 bot: https://lab.llvm.org/buildbot/#/builders/64/builds/1714 as `grep -o` is not supported on AIX and is not POSIX compatible as per: https://www.unix.com/man-page/posix/1p/grep/

>From e60aec92afd46ef363efdccb7b483ece79bc8095 Mon Sep 17 00:00:00 2001
From: Mark Danial <madanial at dixon.rtp.raleigh.ibm.com>
Date: Wed, 18 Dec 2024 12:10:53 -0500
Subject: [PATCH] [NFC] update gfx12 vop test to use sed instead of grep

---
 llvm/test/MC/AMDGPU/gfx12_asm_vop1.s | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/llvm/test/MC/AMDGPU/gfx12_asm_vop1.s b/llvm/test/MC/AMDGPU/gfx12_asm_vop1.s
index e701d1626f388e..edd3b916f4e5f3 100644
--- a/llvm/test/MC/AMDGPU/gfx12_asm_vop1.s
+++ b/llvm/test/MC/AMDGPU/gfx12_asm_vop1.s
@@ -1,8 +1,8 @@
 // NOTE: Assertions have been autogenerated by utils/update_mc_test_checks.py UTC_ARGS: --unique --version 5
 // RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize32,+real-true16 -show-encoding -comment-column=0 %s | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-ASM %s
-// RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize32,+real-true16 -show-encoding %s | grep -oE '\[0x[0-9a-fx,]+\]' | llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize32,+real-true16 -disassemble -show-encoding -comment-column=0 | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-DIS %s
+// RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize32,+real-true16 -show-encoding %s | sed -n 's#.*\(\[0x[0-9a-fx,]\{1,\}\]\)#\1#p' | llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize32,+real-true16 -disassemble -show-encoding -comment-column=0 | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-DIS %s
 // RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize64,+real-true16 -show-encoding -comment-column=0 %s | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-ASM %s
-// RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize64,+real-true16 -show-encoding %s | grep -oE '\[0x[0-9a-fx,]+\]' | llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize64,+real-true16 -disassemble -show-encoding -comment-column=0 | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-DIS %s
+// RUN: llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize64,+real-true16 -show-encoding %s | sed -n 's#.*\(\[0x[0-9a-fx,]\{1,\}\]\)#\1#p' | llvm-mc -triple=amdgcn -mcpu=gfx1200 -mattr=+wavefrontsize64,+real-true16 -disassemble -show-encoding -comment-column=0 | FileCheck --strict-whitespace --check-prefixes=GFX12,GFX12-DIS %s
 
 v_bfrev_b32_e32 v5, v1
 // GFX12: v_bfrev_b32_e32 v5, v1 ; encoding: [0x01,0x71,0x0a,0x7e]