[llvm-dev] Clang/LLVM 5.0 optnone attribute with -O0
Diptorup Deb via llvm-dev
llvm-dev at lists.llvm.org
Sun Sep 17 22:12:46 PDT 2017
We have a research LLVM-based domain-specific code generator that we
want to upgrade form LLVM 4.0 to 5.0. The code generator is written as
an out-of-tree loadable module for opt.
Till Clang 4.0 we were compiling the front-end code (annotated C++)
using -O0. The generated bitcode was further processed using opt with
our module loaded. In Clang 5.0 we see that using -O0 adds the optnone
attribute to all functions, making it impossible to use any existing
LLVM passes in our code generator.
We also tried using -
"clang -Xclang -load -Xclang <module>.so -mllvm <custom options>"
, but this caused a segfault at
What is the right way to get around this issue?
More information about the llvm-dev