PNaCl: Add ReplacePtrsWithInts pass for stripping out pointer types

ReplacePtrsWithInts converts IR to a normal form in which functions
don't reference any aggregate pointer types and pointer types only
appear inside a few instructions.

Change BlockAddress::replaceUsesOfWithOnConstant() to handle changing
a function's type by replacing a function with a bitcast ConstantExpr
of a new function.

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3343
TEST=replace-ptrs-with-ints.ll + PNaCl toolchain trybots, torture tests, etc.

Review URL: https://codereview.chromium.org/14262011

1 files changed, 4 insertions, 0 deletions

diff --git a/include/llvm/Transforms/NaCl.h b/include/llvm/Transforms/NaCl.h
index b2c012f08d..c324fa8c0c 100644
--- a/include/llvm/Transforms/NaCl.h
+++ b/include/llvm/Transforms/NaCl.h
@@ -29,6 +29,7 @@ ModulePass *createExpandVarArgsPass();
 ModulePass *createFlattenGlobalsPass();
 ModulePass *createGlobalCleanupPass();
 FunctionPass *createPromoteIntegersPass();
+ModulePass *createReplacePtrsWithIntsPass();
 ModulePass *createResolveAliasesPass();
 ModulePass *createRewritePNaClLibraryCallsPass();
 ModulePass *createStripMetadataPass();
@@ -37,6 +38,9 @@ FunctionPass *createInsertDivideCheckPass();
 Instruction *PhiSafeInsertPt(Use *U);
 void PhiSafeReplaceUses(Use *U, Value *NewVal);
 
+// Copy debug information from Original to NewInst, and return NewInst.
+Instruction *CopyDebug(Instruction *NewInst, Instruction *Original);
+
 }
 
 #endif