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correct parameter offset

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Brendan Hansknecht 2022-07-17 07:32:16 -07:00
parent 865e789966
commit 837ce38066
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1 changed files with 9 additions and 2 deletions
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11
crates/compiler/gen_llvm/src/llvm/build.rs
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@ -3910,8 +3910,15 @@ fn expose_function_to_host_help_c_abi_v2<'a, 'ctx, 'env>(
Attribute::get_named_enum_kind_id("nonnull"),
arg_type.into_pointer_type().get_element_type(),
);
c_function.add_attribute(AttributeLoc::Param((i + 1) as u32), byval);
c_function.add_attribute(AttributeLoc::Param((i + 1) as u32), nonnull);
// C return pointer goes at the beginning of params, and we must skip it if it exists.
let param_index = (i
+ (if matches!(cc_return, CCReturn::ByPointer) {
1
} else {
0
})) as u32;
c_function.add_attribute(AttributeLoc::Param(param_index), byval);
c_function.add_attribute(AttributeLoc::Param(param_index), nonnull);
// bitcast the ptr
let fastcc_ptr = env
.builder