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# 5f2cf3a2 29-Jun-2022 Egor Zhdan <[email protected]>

[Clang][Preprocessor] Fix inconsistent `FLT_EVAL_METHOD` when compiling vs preprocessing

When running `clang -E -Ofast` on macOS, the `__FLT_EVAL_METHOD__` macro is `0`, which causes the following t

[Clang][Preprocessor] Fix inconsistent `FLT_EVAL_METHOD` when compiling vs preprocessing

When running `clang -E -Ofast` on macOS, the `__FLT_EVAL_METHOD__` macro is `0`, which causes the following typedef to be emitted into the preprocessed source: `typedef float float_t`.

However, when running `clang -c -Ofast`, `__FLT_EVAL_METHOD__` is `-1`, and `typedef long double float_t` is emitted.

This causes build errors for certain projects, which are not reproducible when compiling from preprocessed source.

The issue is that `__FLT_EVAL_METHOD__` is configured in `Sema::Sema` which is not executed when running in `-E` mode.

This change moves that logic into the preprocessor initialization method, which is invoked correctly in `-E` mode.

rdar://96134605
rdar://92748429

Differential Revision: https://reviews.llvm.org/D128814

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Revision tags: llvmorg-14.0.6, llvmorg-14.0.5, llvmorg-14.0.4, llvmorg-14.0.3, llvmorg-14.0.2, llvmorg-14.0.1, llvmorg-14.0.0, llvmorg-14.0.0-rc4, llvmorg-14.0.0-rc3, llvmorg-14.0.0-rc2, llvmorg-14.0.0-rc1, llvmorg-15-init, llvmorg-13.0.1, llvmorg-13.0.1-rc3, llvmorg-13.0.1-rc2, llvmorg-13.0.1-rc1
# 1592d88a 19-Oct-2021 Zahira Ammarguellat <[email protected]>

Add support for floating-point option `ffp-eval-method` and for
`pragma clang fp eval_method`.

Differential Revision: https://reviews.llvm.org/D109239


# 32b73bc6 19-Oct-2021 Zahira Ammarguellat <[email protected]>

Add support for floating-point option `ffp-eval-method` and for
`pragma clang fp eval_method`.

https://reviews.llvm.org/D109239


# 4bafe65c 19-Oct-2021 Zahira Ammarguellat <[email protected]>

Add support for floating-point option `ffp-eval-method` and for
`pragma clang fp eval_method`.