Sync from rust 942db67

Author: bjorn3

patches/0029-stdlib-Disable-f16-and-f128-in-compiler-builtins.patch

@@ -16,8 +16,8 @@ index 7165c3e48af..968552ad435 100644
 
  [dependencies]
  core = { path = "../core" }
--compiler_builtins = { version = "=0.1.143", features = ['rustc-dep-of-std'] }
-+compiler_builtins = { version = "=0.1.143", features = ['rustc-dep-of-std', 'no-f16-f128'] }
+-compiler_builtins = { version = "=0.1.145", features = ['rustc-dep-of-std'] }
++compiler_builtins = { version = "=0.1.145", features = ['rustc-dep-of-std', 'no-f16-f128'] }
 
  [dev-dependencies]
  rand = { version = "0.8.5", default-features = false, features = ["alloc"] }

src/base.rs

@@ -868,7 +868,16 @@ fn codegen_stmt<'tcx>(
  NullOp::UbChecks => {
  let val = fx.tcx.sess.ub_checks();
  let val = CValue::by_val(
- fx.bcx.ins().iconst(types::I8, i64::try_from(val).unwrap()),
+ fx.bcx.ins().iconst(types::I8, i64::from(val)),
+ fx.layout_of(fx.tcx.types.bool),
+ );
+ lval.write_cvalue(fx, val);
+ return;
+ }
+ NullOp::ContractChecks => {
+ let val = fx.tcx.sess.contract_checks();
+ let val = CValue::by_val(
+ fx.bcx.ins().iconst(types::I8, i64::from(val)),
  fx.layout_of(fx.tcx.types.bool),
  );
  lval.write_cvalue(fx, val);