On Fri, Mar 13, 2015 at 4:09 PM, Eric Christopher <[email protected]> wrote:
> No, you probably haven't. I was seeing it as clang doing to lto link of > the module together and then codegen based on that (which means it would > have the options), but... > > That said, I think the general problem is more specific. I.e. how do you > specify -msse3 as part of the default code generation flags when you do lto? > > In LTOCodeGenerator.cpp, SubtargetFeatures::getDefaultSubtargetFeatures is called to get the default subtarget features and the string is passed to TargetCreateTargetMachine. Is that what you are asking about? > The C++ interface has addAttr (which is painful in that it requires, as > you say, every linker to understand llvm's command line interface), but > this is also pretty painful: > > const void *compile(size_t *length, > bool disableOpt, > bool disableInline, > bool disableGVNLoadPRE, > bool disableVectorization, > std::string &errMsg); > > because, you know, all optimizations, inlining, gvnloadpre, and > vectorization are all anyone care about :) > > Realize this has dovetailed into "let's solve the general problem" but I > am curious. The gold plugin's methods aren't much better. > > Or am I missing something? > > -eric > > > http://reviews.llvm.org/D7968 > > EMAIL PREFERENCES > http://reviews.llvm.org/settings/panel/emailpreferences/ > > >
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