[llvm] [AArch64][SME] Use reportFatalUsageError rather than assert (NFC) (PR #145491)

[Benjamin Maxwell via llvm-commits]

https://github.com/MacDue created https://github.com/llvm/llvm-project/pull/145491

Fixes #144351

>From 30d0f848facd652a3052a88107267e147b65b80c Mon Sep 17 00:00:00 2001
From: Benjamin Maxwell <benjamin.maxwell at arm.com>
Date: Tue, 24 Jun 2025 10:07:36 +0000
Subject: [PATCH] [AArch64][SME] Use reportFatalUsageError rather than assert
 (NFC)

Fixes #144351
---
 llvm/lib/Target/AArch64/AArch64TargetMachine.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Target/AArch64/AArch64TargetMachine.cpp b/llvm/lib/Target/AArch64/AArch64TargetMachine.cpp
index 8150e91c8ba52..65c3417cbb69f 100644
--- a/llvm/lib/Target/AArch64/AArch64TargetMachine.cpp
+++ b/llvm/lib/Target/AArch64/AArch64TargetMachine.cpp
@@ -481,7 +481,8 @@ AArch64TargetMachine::getSubtargetImpl(const Function &F) const {
         MaxSVEVectorSize, IsStreaming, IsStreamingCompatible, HasMinSize);
   }
 
-  assert((!IsStreaming || I->hasSME()) && "Expected SME to be available");
+  if (IsStreaming && !I->hasSME())
+    reportFatalUsageError("Streaming SVE functions require SME");
 
   return I.get();
 }