[llvm] [llvm][ARM] Add Addend Checks for MOVT and MOVW instructions. (PR #111970)

[Jack Styles via llvm-commits]

Stylie777 wrote:

Revert submitted at: https://github.com/llvm/llvm-project/pull/112184

Thanks for letting me know,

Jack

Jack Styles
Apprentice Software Engineer, CE Software
www.arm.com<http://www.arm.com>

[signature_2396084166]


From: Martin Storsjö ***@***.***>
Date: Monday, 14 October 2024 at 12:22
To: llvm/llvm-project ***@***.***>
Cc: Jack Styles ***@***.***>, State change ***@***.***>
Subject: Re: [llvm/llvm-project] [llvm][ARM] Add Addend Checks for MOVT and MOVW instructions. (PR #111970)

This breaks code generation for Windows/ARM - we hit the Relocation Not In Range when compiling regular C/C++ code.

This is reproducible with https://martin.st/temp/outofrange.cpp, like this:

$ clang -target armv7-w64-mingw32 outofrange.cpp -O3 -c

error: Relocation Not In Range

error: Relocation Not In Range

2 errors generated.

When looking at the output of the same compilation like this:

$ clang -target armv7-w64-mingw32 outofrange.cpp -O3 -S -o - | grep -E 'upper16|lower16'

There's no single case of a lower16/upper16 relocation that has any offset at all - yet compilation fails.

Please revert while figuring out what's going wrong here.

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https://github.com/llvm/llvm-project/pull/111970