commit	a9906c1e5e990e37cf46d7522e22e1dd25ce35bc	[log] [tgz]
author	Vedant Kumar <vsk@apple.com>	Thu Jan 17 02:15:05 2019 +0000
committer	Vedant Kumar <vsk@apple.com>	Thu Jan 17 02:15:05 2019 +0000
tree	09e6adc4860da9ae5fca3c553e5d7593e3b33bd6
parent	3cfcc94c099140cade96d0d799f017f95eb20bd9 [diff]

[MergeFunc] Prevent silent miscompile of vararg functions

The function merging pass miscompiles identical vararg functions. The
forwarding thunk it emits doesn't forward the full variable-length list
of arguments. Disable merging for vararg functions for now.

I've filed llvm.org/PR40345 to track the issue.

rdar://47326238

llvm-svn: 351411

llvm/lib/Transforms/IPO/MergeFunctions.cpp[diff]
llvm/test/Transforms/MergeFunc/va_arg.ll[Added - diff]

2 files changed

tree: 09e6adc4860da9ae5fca3c553e5d7593e3b33bd6

clang/
clang-tools-extra/
compiler-rt/
debuginfo-tests/
libclc/
libcxx/
libcxxabi/
libunwind/
lld/
lldb/
llgo/
llvm/
openmp/
parallel-libs/
polly/
pstl/
.arcconfig
README.md

README.md

The LLVM Compiler Infrastructure

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.