-fno-discard-value-names

[nickdesaulniers]

-fno-discard-value-names is handy when debugging LLVM to keep variable names in the IR rather than numbered identifiers.

[nickdesaulniers]

also, I recently used llvm-extract to pull a function out of a huge piece of IR. It would be helpful to document that.

[nickdesaulniers]

also:

object->print(llvm::errs());

is way better than

#include <string>
std::string out;
llvm::raw_string_ostream RSO(out);
object->print(RSO);
llvm::outs() << out.str();

[nickdesaulniers]

opt -print-module-scope

[nickdesaulniers]

for llc: llc -stop-after=branch-folder -debug-only=branch-folder -print-before=branch-folder -print-after=branch-folder

[nickdesaulniers]

also @gwelymernans mentioned opt -debug-pass=Arguments.

[nickdesaulniers]

how to manually invoke tablegen? how to print passes clang is running? dump() method cvise clean up recommendation of llvm-reduce print-before-all stop-after where to ask for more help

[nickdesaulniers]

-o -: print to stdout rather than write output to file

[nickdesaulniers]

-mllvm -debug-pass=Structure