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[clang] document that by default FP turned off for ARM baremetal #122881

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[clang] document that by default FP turned off for ARM baremetal #122881

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[clang] document that by default FP turned off for ARM baremetal
stuij Jan 14, 2025
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Address review comment by moving text up and expanding on it
stuij Jan 14, 2025
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4 changes: 4 additions & 0 deletions clang/docs/ReleaseNotes.rst
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Expand Up @@ -1071,6 +1071,10 @@ Arm and AArch64 Support
- Implementation of SVE2.1 and SME2.1 in accordance with the Arm C Language
Extensions (ACLE) is now available.

- For ARM baremetal targets, the frame pointer (FP) is now turned off by
default. To turn on frame pointers for Arm baremetal targets, use
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Arm -> ARM

the ``-fno-omit-frame-pointer`` command line option.

- In the ARM Target, the frame pointer (FP) of a leaf function can be retained
by using the ``-fno-omit-frame-pointer`` option. If you want to eliminate the FP
in leaf functions after enabling ``-fno-omit-frame-pointer``, you can do so by adding
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