cranelift: Fix fuzzgen iconst encoding (bytecodealliance#6967)

Resolves bytecodealliance#6965 Linked to bytecodealliance#3059 bytecodealliance#6850 bytecodealliance#6958 Co-authored-by: Afonso Bordado <[email protected]>
gurry · Sep 5, 2023 · 36ca00c · 36ca00c
1 parent 8eefa7c
commit 36ca00c
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/cranelift/fuzzgen/src/function_generator.rs b/cranelift/fuzzgen/src/function_generator.rs
@@ -1375,9 +1375,9 @@ where
     /// Generates an instruction(`iconst`/`fconst`/etc...) to introduce a constant value
     fn generate_const(&mut self, builder: &mut FunctionBuilder, ty: Type) -> Result<Value> {
         Ok(match self.u.datavalue(ty)? {
-            DataValue::I8(i) => builder.ins().iconst(ty, i as i64),
-            DataValue::I16(i) => builder.ins().iconst(ty, i as i64),
-            DataValue::I32(i) => builder.ins().iconst(ty, i as i64),
+            DataValue::I8(i) => builder.ins().iconst(ty, i as u8 as i64),
+            DataValue::I16(i) => builder.ins().iconst(ty, i as u16 as i64),
+            DataValue::I32(i) => builder.ins().iconst(ty, i as u32 as i64),
             DataValue::I64(i) => builder.ins().iconst(ty, i as i64),
             DataValue::I128(i) => {
                 let hi = builder.ins().iconst(I64, (i >> 64) as i64);