[clang] [Clang] Support `-falign-loops=N` for LTO (PR #181702)

[Fangrui Song via cfe-commits]

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@@ -7,6 +7,8 @@
 // RUN: %clang -### -falign-loops=65536 %s 2>&1 | FileCheck %s --check-prefix=CHECK_65536
 // RUN: not %clang -### -falign-loops=65537 %s 2>&1 | FileCheck %s --check-prefix=CHECK_65537
 // RUN: not %clang -### -falign-loops=a %s 2>&1 | FileCheck %s --check-prefix=CHECK_ERR_A
+// RUN: %clang -### -falign-loops=2 -fuse-ld=lld %s 2>&1 | FileCheck --check-prefixes=CC1,OBJ %s
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MaskRay wrote:

Remove this linking with lld test. You can merge the check prefixes to  -falign-loops=4 or 65536 above since they also test the link phase.

https://github.com/llvm/llvm-project/pull/181702