From 475c6f503e2c9bd25ba009f95b866120b4b77b54 Mon Sep 17 00:00:00 2001 From: Dylan McKay Date: Thu, 12 Mar 2020 19:07:01 +1300 Subject: [PATCH] [AVR] Include AVR by default in LLVM builds This was initially committed and promptly reverted in 9059056e273ccc3a236751609e498b4c401eb6ff after a MSan failure was found by the sanitizer bots. These have since been fixed. Summary: This patch makes the AVR backend an official target of LLVM, serving as a request for comments for moving the AVR backend out of experimental. A future patch will move the LLVM AVR buildbot (llvm-avr-linux) from the staging buildmaster to the production buildmaster, so error emails will start to go out. Summary of the backend ---------------------- - 16-bit little endian - AsmParser based assembly parser - uses the MC library for generating AVR ELFs - most logic driven from standard TableGen-erated tables like other backends - passes all of the test suite under `check-all`, including generic CodeGen and DebugInfo tests - Used in two frontends - Limited, but functional support for DebugInfo and LLVM DWARF dumping - Binary compatible with AVR-GCC and avr-{libc,libgcc} for the most part - Cannot lower 32-bit shifts due to a bug, can lower shifts larger or smaller - Supports assembly/MC for all the entire AVR ISA, generally generates poorly optimized machine instructions, with most focus thus far on correctness I've added reviewers and subscribers from previous patches where backends were made official, and those who participated in the recent thread on llvm-dev, please add anybody I've missed. The most recent discussion on this topic can be found in the llvm-dev thread [Moving the AVR backend out of experimental](https://lists.llvm.org/pipermail/llvm-dev/2020-February/139158.html) Reviewers: chandlerc, lattner, rengolin, tstellar, arsenm, thakis, simoll, asb Reviewed By: rengolin, thakis Subscribers: CryZe, wdng, mgorny, aprantl, Jim, hans, aykevl, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D75099 --- CMakeLists.txt | 1 + 1 file changed, 1 insertion(+) diff --git a/CMakeLists.txt b/CMakeLists.txt index 02c4bddf21a..0da3302425c 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -289,6 +289,7 @@ set(LLVM_ALL_TARGETS AArch64 AMDGPU ARM + AVR BPF Hexagon Lanai