Skip to content
Commit 588d1cda authored by Matthias Braun's avatar Matthias Braun
Browse files

X86: Use a callee save register for the swiftself parameter.

It is very likely that the swiftself parameter is alive throughout most
functions function so putting it into a callee save register should
avoid spills for the callers with only a minimum amount of extra spills
in the callees.

Currently the generated code is correct but unnecessarily spills and
reloads arguments passed in callee save registers, I will address this
in upcoming patches.

This also adds a missing check that for tail calls the preserved value
of the caller must be the same as the callees parameter.

Differential Revision: http://reviews.llvm.org/D18902

llvm-svn: 266252
parent 74a0bd31
Loading
Loading
Loading
Loading
0% Loading or .
You are about to add 0 people to the discussion. Proceed with caution.
Please to comment