Extract optimization pass selection code from llvm-gcc into a separate routine.

This can be used by other stand alone tools, such as 'opt'.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56229 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 36 insertions, 0 deletions

diff --git a/include/llvm/PassManagerUtils.h b/include/llvm/PassManagerUtils.h
new file mode 100644
index 0000000000..8d34c358ef
--- /dev/null
+++ b/include/llvm/PassManagerUtils.h
@@ -0,0 +1,36 @@
+//===-- llvm/Support/PassManagerUtils.h -------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides interface to pass manager utilities.
+//
+//===----------------------------------------------------------------------===//
+
+namespace llvm {
+
+class FunctionPassManager;
+class PassManager;
+
+/// AddOptimizationPasses - This routine adds optimization passes 
+/// based on selected optimization level, OptLevel. This routine is
+/// used by llvm-gcc and other tools.
+///
+/// OptLevel - Optimization Level
+/// EnableIPO - Enables IPO passes. llvm-gcc enables this when
+///             flag_unit_at_a_time is set.
+/// InlinerSelection - 1 : Add function inliner.
+///                  - 2 : Add AlwaysInliner.
+/// OptLibCalls - Simplify lib calls, if set.
+/// PruneEH - Add PruneEHPass, if set.
+/// UnrollLoop - Unroll loops, if set.
+void AddOptimizationPasses(FunctionPassManager &FPM, PassManager &MPM,
+                           unsigned OptLevel, bool EnableIPO,
+                           unsigned InlinerSelection, bool OptLibCalls,
+                           bool PruneEH, bool UnrollLoop);
+
+}