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implement helper for easy allocation of a word on the stack

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Signed-off-by: xermicus <cyrill@parity.io>
This commit is contained in:
xermicus
2024-05-07 13:40:54 +02:00
parent c0dd845b39
commit a7318f2ef6
1 changed files with 15 additions and 25 deletions
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crates/llvm-context/src/polkavm/context/mod.rs
+15 -25
View File
@@ -610,6 +610,16 @@ where
Pointer::new(r#type, AddressSpace::Stack, pointer) Pointer::new(r#type, AddressSpace::Stack, pointer)
} }
/// Allocates a word-sized byte buffer on the stack.
/// Returns the allocation pointer and the length pointer.
pub fn build_stack_word_parameter(&self, name: &str) -> (Pointer<'ctx>, Pointer<'ctx>) {
let buffer_pointer = self.build_alloca(self.word_type(), name);
let length_pointer = self
.get_global(GLOBAL_WORD_SIZE)
.expect("should be declared");
(buffer_pointer, length_pointer.into())
}
/// Builds a stack load instruction. /// Builds a stack load instruction.
/// Sets the alignment to 256 bits for the stack and 1 bit for the heap, parent, and child. /// Sets the alignment to 256 bits for the stack and 1 bit for the heap, parent, and child.
pub fn build_load( pub fn build_load(
@@ -657,39 +667,19 @@ where
self.xlen_type(), self.xlen_type(),
"storage_key_pointer_casted", "storage_key_pointer_casted",
)?; )?;
let storage_value_pointer = self.build_alloca(self.word_type(), "storage_value");
let storage_value_pointer_casted = self.builder().build_ptr_to_int(
storage_value_pointer.value,
self.xlen_type(),
"storage_value_pointer_casted",
)?;
let storage_value_length_pointer =
self.build_alloca(self.xlen_type(), "out_len_ptr");
let storage_value_length_pointer_casted = self.builder().build_ptr_to_int(
storage_value_length_pointer.value,
self.xlen_type(),
"storage_value_length_pointer_cast",
)?;
self.builder() self.builder()
.build_store(storage_key_pointer.value, storage_key_value)?; .build_store(storage_key_pointer.value, storage_key_value)?;
self.builder().build_store(
storage_value_length_pointer.value, let (storage_value_pointer, storage_value_length_pointer) =
self.integer_const( self.build_stack_word_parameter("storage_value_pointer");
crate::polkavm::XLEN,
revive_common::BYTE_LENGTH_WORD as u64,
),
)?;
self.build_runtime_call( self.build_runtime_call(
runtime_api::GET_STORAGE, runtime_api::GET_STORAGE,
&[ &[
storage_key_pointer_casted.into(), storage_key_pointer_casted.into(),
self.integer_const(crate::polkavm::XLEN, 32).into(), self.integer_const(crate::polkavm::XLEN, 32).into(),
storage_value_pointer_casted.into(), storage_value_pointer.to_int(self).into(),
storage_value_length_pointer_casted.into(), storage_value_length_pointer.to_int(self).into(),
], ],
); );