llvm-project/llvm/tools/llvm-dwp
Rafael Espindola 9f92995781 Don't pass the code model to MC
I was surprised to see the code model being passed to MC. After all,
it assembles code, it doesn't create it.

The one place it is used is in the expansion of .cfi directives to
handle .eh_frame being more that 2gb away from the code.

As far as I can tell, gnu assembler doesn't even have an option to
enable this. Compiling a c file with gcc -mcmodel=large produces a
regular looking .eh_frame. This is probably because in practice linker
parse and recreate .eh_frames.

In llvm this is used because the JIT can place the code and .eh_frame
very far apart. Ideally we would fix the jit and delete this
option. This is hard.

Apart from confusion another problem with the current interface is
that most callers pass CodeModel::Default, which is bad since MC has
no way to map it to the target default if it actually needed to.

This patch then replaces the argument with a boolean with a default
value. The vast majority of users don't ever need to look at it. In
fact, only CodeGen and llvm-mc use it and llvm-mc just to enable more
testing.

llvm-svn: 309884
2017-08-02 20:32:26 +00:00
..
CMakeLists.txt [CMake] llvm-dwp depends on intrinsics_gen 2016-11-19 02:33:42 +00:00
DWPError.cpp llvm-dwp: Use llvm::Error to improve diagnostic quality/error handling in llvm-dwp 2016-05-12 19:59:54 +00:00
DWPError.h llvm-dwp: Add an abstraction for the DWP string pool 2016-05-23 16:32:11 +00:00
DWPStringPool.h llvm-dwp: Fix the build by moving DWPStringPool into the llvm namespace 2016-05-23 16:45:00 +00:00
LLVMBuild.txt
llvm-dwp.cpp Don't pass the code model to MC 2017-08-02 20:32:26 +00:00