forked from M-Labs/nac3
core: Allocate exceptions at the beginning of function
Only one instance of exception is necessary, as exceptions will always be initialized before being thrown.
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@ -459,9 +459,14 @@ impl<'ctx, 'a> CodeGenContext<'ctx, 'a> {
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params: [Option<IntValue<'ctx>>; 3],
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loc: Location,
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) {
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let zelf = if let Some(exception_val) = self.exception_val {
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exception_val
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} else {
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let ty = self.get_llvm_type(generator, self.primitives.exception).into_pointer_type();
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let zelf_ty: BasicTypeEnum = ty.get_element_type().into_struct_type().into();
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let zelf = generator.gen_var_alloc(self, zelf_ty, Some("exn")).unwrap();
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self.exception_val.insert(zelf).to_owned()
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};
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let int32 = self.ctx.i32_type();
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let zero = int32.const_zero();
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unsafe {
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@ -146,6 +146,7 @@ pub struct CodeGenContext<'ctx, 'a> {
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pub const_strings: HashMap<String, BasicValueEnum<'ctx>>,
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// stores the alloca for variables
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pub init_bb: BasicBlock<'ctx>,
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pub exception_val: Option<PointerValue<'ctx>>,
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/// The header and exit basic blocks of a loop in this context. See
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/// https://llvm.org/docs/LoopTerminology.html for explanation of these terminology.
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pub loop_target: Option<(BasicBlock<'ctx>, BasicBlock<'ctx>)>,
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@ -802,6 +803,7 @@ pub fn gen_func_impl<'ctx, G: CodeGenerator, F: FnOnce(&mut G, &mut CodeGenConte
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type_cache,
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primitives,
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init_bb,
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exception_val: Default::default(),
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builder,
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module,
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unifier,
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