PNaCl: Add "-pnacl-abi-simplify-{pre,post}opt" meta-passes to "opt"

These meta-passes will be used to replace the pass lists that are
currently in the pnacl-ld.py driver script in the NaCl repo.

I've moved the comments across from pnacl-ld.py and added a couple
more comments for ExpandByVal and StripMetadata.

Fix the declaration of createResolveAliasesPass().

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3435
TEST=new *.ll tests + tested with change to pnacl-ld.py

Review URL: https://codereview.chromium.org/15669002

1 files changed, 4 insertions, 0 deletions

diff --git a/include/llvm/Transforms/NaCl.h b/include/llvm/Transforms/NaCl.h
index af1dee2ebe..3b9ce35dc8 100644
--- a/include/llvm/Transforms/NaCl.h
+++ b/include/llvm/Transforms/NaCl.h
@@ -16,6 +16,7 @@ class BasicBlockPass;
 class FunctionPass;
 class Instruction;
 class ModulePass;
+class PassManager;
 class Use;
 class Value;
 
@@ -36,6 +37,9 @@ ModulePass *createRewritePNaClLibraryCallsPass();
 ModulePass *createStripMetadataPass();
 FunctionPass *createInsertDivideCheckPass();
 
+void PNaClABISimplifyAddPreOptPasses(PassManager &PM);
+void PNaClABISimplifyAddPostOptPasses(PassManager &PM);
+
 Instruction *PhiSafeInsertPt(Use *U);
 void PhiSafeReplaceUses(Use *U, Value *NewVal);