diff options
| -rw-r--r-- | include/llvm/CodeGen/Passes.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/include/llvm/CodeGen/Passes.h b/include/llvm/CodeGen/Passes.h index 09b6a92142..7007f98942 100644 --- a/include/llvm/CodeGen/Passes.h +++ b/include/llvm/CodeGen/Passes.h @@ -23,7 +23,15 @@ namespace llvm { class FunctionPass; class PassInfo; class TargetMachine; - + + /// createUnreachableBlockEliminationPass - The LLVM code generator does not + /// work well with unreachable basic blocks (what live ranges make sense for a + /// block that cannot be reached?). As such, a code generator should either + /// not instruction select unreachable blocks, or it can run this pass as it's + /// last LLVM modifying pass to clean up blocks that are not reachable from + /// the entry block. + FunctionPass *createUnreachableBlockEliminationPass(); + /// MachineFunctionPrinter pass - This pass prints out the machine function to /// standard error, as a debugging tool. FunctionPass *createMachineFunctionPrinterPass(std::ostream *OS, |