[llvm] [GlobalISel] Bail out early for big-endian (PR #103310)

[Matt Arsenault via llvm-commits]

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@@ -0,0 +1,18 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc -mtriple aarch64-unknown-linux-musl -O0 < %s | FileCheck %s --check-prefix=CHECK-LE
+; RUN: llc -mtriple aarch64_be-unknown-linux-musl -O0 < %s | FileCheck %s --check-prefix=CHECK-BE
+
+; Make sure we fall-back to SDAG for BE targets.
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arsenm wrote:

This doesn't really do that unless you check for the fallback remark 

https://github.com/llvm/llvm-project/pull/103310