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[libc] Suppress GCC loop optimization warning #132458

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[libc] Suppress GCC loop optimization warning #132458

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14 changes: 12 additions & 2 deletions libc/src/__support/big_int.h
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Original file line number Diff line number Diff line change
Expand Up @@ -790,11 +790,21 @@ struct BigInt {
remainder[pos] = rem;
}

// GCC currently emits a false-positive warning on this for some compilers.
#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Waggressive-loop-optimizations"
#endif

// Set the remaining lower bits of the remainder.
for (; pos > 0; --pos) {
remainder[pos - 1] = val[pos - 1];
}

#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif

*this = quotient;
return remainder;
}
Expand Down Expand Up @@ -851,8 +861,8 @@ struct BigInt {
result[i] = lhs[i] OP rhs[i]; \
return result; \
} \
LIBC_INLINE friend constexpr BigInt operator OP##=(BigInt &lhs, \
const BigInt &rhs) { \
LIBC_INLINE friend constexpr BigInt operator OP## = \
(BigInt & lhs, const BigInt &rhs) { \
for (size_t i = 0; i < WORD_COUNT; ++i) \
lhs[i] OP## = rhs[i]; \
return lhs; \
Expand Down
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