[llvm] LoongArch: Improve detection of valid TripleABI (PR #147952)

[via llvm-commits]

https://github.com/mintsuki updated https://github.com/llvm/llvm-project/pull/147952

>From 34376aff10060c30e0832b0a0f26c641573f8592 Mon Sep 17 00:00:00 2001
From: Mintsuki <mintsuki at protonmail.com>
Date: Thu, 10 Jul 2025 14:37:07 +0200
Subject: [PATCH] LoongArch: Improve detection of valid TripleABI

Addresses issue #147665
---
 .../Target/LoongArch/MCTargetDesc/LoongArchBaseInfo.cpp    | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchBaseInfo.cpp b/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchBaseInfo.cpp
index 03ce004ed33a5..e9bf487ca4bba 100644
--- a/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchBaseInfo.cpp
+++ b/llvm/lib/Target/LoongArch/MCTargetDesc/LoongArchBaseInfo.cpp
@@ -60,11 +60,12 @@ static ABI getTripleABI(const Triple &TT) {
   case llvm::Triple::EnvironmentType::MuslF32:
     TripleABI = Is64Bit ? ABI_LP64F : ABI_ILP32F;
     break;
-  // Let the fallback case behave like {ILP32,LP64}D.
   case llvm::Triple::EnvironmentType::GNUF64:
-  default:
     TripleABI = Is64Bit ? ABI_LP64D : ABI_ILP32D;
     break;
+  default:
+    TripleABI = ABI_Unknown;
+    break;
   }
   return TripleABI;
 }
@@ -96,7 +97,7 @@ ABI computeTargetABI(const Triple &TT, const FeatureBitset &FeatureBits,
 
   // 1. If the '-target-abi' is valid, use it.
   if (IsABIValidForFeature(ArgProvidedABI)) {
-    if (TT.hasEnvironment() && ArgProvidedABI != TripleABI)
+    if (IsABIValidForFeature(TripleABI) && ArgProvidedABI != TripleABI)
       errs()
           << "warning: triple-implied ABI conflicts with provided target-abi '"
           << ABIName << "', using target-abi\n";