Add Float::make_quiet method

Upstream LLVM commit: 83ba349ae0a853e0c2cd8e8aadc88993e9fb9a19

Previous commit, 36606cf07080a44a1a9157f80112f9512bd6a3bf, has been skipped because it does not affect the Rust port.

Author: eduardosm

Cargo.toml

@@ -2,7 +2,7 @@
 members = ["fuzz"]
 
 [workspace.package]
-version = "0.2.0+llvm-6109e70c72fc"
+version = "0.2.0+llvm-83ba349ae0a8"
 edition = "2021"
 license = "Apache-2.0 WITH LLVM-exception"
 

src/ieee.rs

@@ -1825,6 +1825,15 @@ impl<S: Semantics> Float for IeeeFloat<S> {
         self.read_only_category_do_not_mutate
     }
 
+    fn make_quiet(mut self) -> Self {
+        if self.is_nan() {
+            self.sig[0] |= S::QNAN_SIGNIFICAND;
+            self
+        } else {
+            self
+        }
+    }
+
     fn get_exact_inverse(self) -> Option<Self> {
         // Special floats and denormals have no exact inverse.
         if !self.is_finite_non_zero() {

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/6109e70c72fc5171d25c4467fc3cfe6eb2029f50
+//! https://github.com/llvm/llvm-project/commit/83ba349ae0a853e0c2cd8e8aadc88993e9fb9a19
 //! * `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
@@ -570,6 +570,9 @@ pub trait Float:
         self.round_to_integral(Round::TowardZero).value.bitwise_eq(self)
     }
 
+    /// If the value is a signaling NaN, makes it quiet
+    fn make_quiet(self) -> Self;
+
     /// If this value has an exact multiplicative inverse, return it.
     fn get_exact_inverse(self) -> Option<Self>;
 

src/ppc.rs

@@ -420,6 +420,10 @@ where
         self.0.is_integer() && self.1.is_integer()
     }
 
+    fn make_quiet(self) -> Self {
+        Self(self.0.make_quiet(), self.1)
+    }
+
     fn get_exact_inverse(self) -> Option<Self> {
         Fallback::from(self).get_exact_inverse().map(Self::from)
     }