Bump to LLVM revision 038f7debfda0

Cargo.toml

@@ -2,7 +2,7 @@
 members = ["fuzz"]
 
 [workspace.package]
-version = "0.2.3+llvm-462a31f5a5ab"
+version = "0.2.3+llvm-038f7debfda0"
 edition = "2021"
 license = "Apache-2.0 WITH LLVM-exception"
 

src/ieee.rs

@@ -1861,7 +1861,7 @@ impl<S: Semantics> Float for IeeeFloat<S> {
         let max_change = S::MAX_EXP as i32 - (S::MIN_EXP as i32 - sig_bits) + 1;
 
         // Clamp to one past the range ends to let normalize handle overflow.
-        let exp_change = cmp::min(cmp::max(exp as i32, -max_change - 1), max_change);
+        let exp_change = (exp as i32).clamp(-max_change - 1, max_change);
         self.exp = self.exp.saturating_add(exp_change as ExpInt);
         self = self.normalize(round, Loss::ExactlyZero).value;
         if self.is_nan() {

src/lib.rs

@@ -1,6 +1,6 @@
 //! Port of LLVM's APFloat software floating-point implementation from the
 //! following C++ sources (please update commit hash when backporting):
-//! <https://github.com/llvm/llvm-project/commit/462a31f5a5abb905869ea93cc49b096079b11aa4>
+//! <https://github.com/llvm/llvm-project/commit/038f7debfda01471ce0d4eb1fed20da61e5c8b32>
 //! * `llvm/include/llvm/ADT/APFloat.h` -> `Float` and `FloatConvert` traits
 //! * `llvm/lib/Support/APFloat.cpp` -> `ieee` and `ppc` modules
 //! * `llvm/unittests/ADT/APFloatTest.cpp` -> `tests` directory
@@ -275,6 +275,16 @@ pub trait Float:
     // FIXME(eddyb) provide a default when qnan becomes const fn.
     const NAN: Self;
 
+    /// Number of bits needed to represent the largest integer that
+    /// the floating point type can hold.
+    // FIXME should be const fn.
+    fn max_int_bits(signed: bool) -> usize {
+        // The max FP value is pow(2, MaxExponent) * (1 + MaxFraction), so we need
+        // at least one more bit than the MaxExponent to hold the max FP value.
+        // Another extra sign bit is needed for signed integers.
+        Self::MAX_EXP as usize + 1 + (signed as usize)
+    }
+
     /// Factory for QNaN values.
     // FIXME(eddyb) should be const fn.
     fn qnan(payload: Option<u128>) -> Self;