91e11a83fc
Summary: Instead of solving the hard problem of how to pass the callee to the indirect jump thunk without a register, just use a CSR. At a call boundary, there's nothing stopping us from using a CSR to hold the callee as long as we save and restore it in the prologue. Also, add tests for this mregparm=3 case. I wrote execution tests for __llvm_retpoline_push, but they never got committed as lit tests, either because I never rewrote them or because they got lost in merge conflicts. Reviewers: chandlerc, dwmw2 Subscribers: javed.absar, kristof.beyls, hiraditya, llvm-commits Differential Revision: https://reviews.llvm.org/D43214 llvm-svn: 325049
Low Level Virtual Machine (LLVM)
This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.