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Add clarifying comments based on PR feedback

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This commit is contained in:
Brian Carroll 2021-09-13 22:42:04 +02:00
parent c47c3ccf58
commit cfef0f0f47
1 changed files with 7 additions and 1 deletions
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8
compiler/gen_wasm/src/lib.rs
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@ -15,6 +15,7 @@ use crate::backend::WasmBackend;
const PTR_SIZE: u32 = 4;
const PTR_TYPE: ValueType = ValueType::I32;
// All usages of these alignment constants take u32, so an enum wouldn't add any safety.
pub const ALIGN_1: u32 = 0;
pub const ALIGN_2: u32 = 1;
pub const ALIGN_4: u32 = 2;
@ -76,6 +77,11 @@ pub fn build_module_help<'a>(
}
}
// Because of the sorting above, we know the last function in the `for` is the main function.
// Here we grab its index and return it, so that the test_wrapper is able to call it.
// This is a workaround until we implement object files with symbols and relocations.
let main_function_index = function_index;
const MIN_MEMORY_SIZE_KB: u32 = 1024;
const PAGE_SIZE_KB: u32 = 64;
@ -96,5 +102,5 @@ pub fn build_module_help<'a>(
.build();
backend.builder.push_global(stack_pointer_global);
Ok((backend.builder, function_index))
Ok((backend.builder, main_function_index))
}