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Add comment for call argument list preprocessing.

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This commit is contained in:
losfair
2020-03-18 23:41:10 +08:00
parent 8485ccc88c
commit c25ba627df
1 changed files with 8 additions and 0 deletions
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8
lib/singlepass-backend/src/codegen_x64.rs
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@ -6885,6 +6885,10 @@ impl FunctionCodeGenerator<CodegenError> for X64FunctionCode {
self.machine.release_locations_only_osr_state(params.len()); self.machine.release_locations_only_osr_state(params.len());
// Pop arguments off the FP stack and canonicalize them if needed.
//
// Canonicalization state will be lost across function calls, so early canonicalization
// is necessary here.
while let Some(fp) = self.fp_stack.last() { while let Some(fp) = self.fp_stack.last() {
if fp.depth >= self.value_stack.len() { if fp.depth >= self.value_stack.len() {
let index = fp.depth - self.value_stack.len(); let index = fp.depth - self.value_stack.len();
@ -6956,6 +6960,10 @@ impl FunctionCodeGenerator<CodegenError> for X64FunctionCode {
.collect(); .collect();
self.machine.release_locations_only_regs(&params); self.machine.release_locations_only_regs(&params);
// Pop arguments off the FP stack and canonicalize them if needed.
//
// Canonicalization state will be lost across function calls, so early canonicalization
// is necessary here.
while let Some(fp) = self.fp_stack.last() { while let Some(fp) = self.fp_stack.last() {
if fp.depth >= self.value_stack.len() { if fp.depth >= self.value_stack.len() {
let index = fp.depth - self.value_stack.len(); let index = fp.depth - self.value_stack.len();