[llvm] Improve file patterns for some backends. (PR #147633)

[Peter Collingbourne via llvm-commits]

https://github.com/pcc created https://github.com/llvm/llvm-project/pull/147633

I noticed that one of my PRs, #147624, did not get automatically
labelled with `backend:RISC-V` when it touched a test under
`llvm/test/CodeGen/RISCV`. This seems to be because the pattern only
looks for files named `*RISCV*` or `*riscv* and not necessarily files
in a directory named like that. To fix that, let's make RISC-V use
a more accepting pattern, similar to AMDGPU, and do the same for two
other backends.


>From f926dea1027efa263770d6e826d7b217cfa09a93 Mon Sep 17 00:00:00 2001
From: Peter Collingbourne <peter at pcc.me.uk>
Date: Tue, 8 Jul 2025 18:09:08 -0700
Subject: [PATCH] =?UTF-8?q?[=F0=9D=98=80=F0=9D=97=BD=F0=9D=97=BF]=20initia?=
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Created using spr 1.3.6-beta.1
---
 .github/new-prs-labeler.yml | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/.github/new-prs-labeler.yml b/.github/new-prs-labeler.yml
index 863090af9af7e..b05e9c6c56ed0 100644
--- a/.github/new-prs-labeler.yml
+++ b/.github/new-prs-labeler.yml
@@ -784,18 +784,20 @@ backend:NVPTX:
 backend:MIPS:
   - '**/*mips*'
   - '**/*Mips*'
+  - '**/*mips*/**'
+  - '**/*Mips*/**'
 
 backend:RISC-V:
-  - clang/**/*riscv*
-  - clang/**/*RISCV*
-  - llvm/**/*riscv*
-  - llvm/**/*RISCV*
+  - '**/*riscv*'
+  - '**/*RISCV*'
+  - '**/*riscv*/**'
+  - '**/*RISCV*/**'
 
 backend:Xtensa:
-  - clang/**/*xtensa*
-  - clang/**/*Xtensa*
-  - llvm/**/*xtensa*
-  - llvm/**/*Xtensa*
+  - '**/*xtensa*'
+  - '**/*Xtensa*'
+  - '**/*xtensa*/**'
+  - '**/*Xtensa*/**'
 
 lld:coff:
   - lld/**/COFF/**