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Do not align the stack frame for leaf functions not using the stack.

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This commit is contained in:
Benjamin Bouvier
2019-11-06 16:48:34 +01:00
parent 1074c7675e
commit 143cb01489
6 changed files with 54 additions and 24 deletions
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9
cranelift/codegen/src/isa/x86/abi.rs
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@@ -540,7 +540,8 @@ fn baldrdash_prologue_epilogue(func: &mut ir::Function, isa: &dyn TargetIsa) ->
ss.offset = Some(-(bytes as StackOffset));
func.stack_slots.push(ss);
layout_stack(&mut func.stack_slots, stack_align)?;
let is_leaf = func.is_leaf();
layout_stack(&mut func.stack_slots, is_leaf, stack_align)?;
Ok(())
}
@@ -587,7 +588,8 @@ fn fastcall_prologue_epilogue(func: &mut ir::Function, isa: &dyn TargetIsa) -> C
offset: Some(-(SHADOW_STORE_SIZE + csr_stack_size)),
});
let total_stack_size = layout_stack(&mut func.stack_slots, stack_align)? as i32;
let is_leaf = func.is_leaf();
let total_stack_size = layout_stack(&mut func.stack_slots, is_leaf, stack_align)? as i32;
let local_stack_size = i64::from(total_stack_size - csr_stack_size);
// Add CSRs to function signature
@@ -642,7 +644,8 @@ fn system_v_prologue_epilogue(func: &mut ir::Function, isa: &dyn TargetIsa) -> C
offset: Some(-csr_stack_size),
});
let total_stack_size = layout_stack(&mut func.stack_slots, stack_align)? as i32;
let is_leaf = func.is_leaf();
let total_stack_size = layout_stack(&mut func.stack_slots, is_leaf, stack_align)? as i32;
let local_stack_size = i64::from(total_stack_size - csr_stack_size);
// Add CSRs to function signature