PNaCl: Add pass to expand out Clang-generated umul.with.overflow calls

This adds a pass, ExpandMulWithOverflow, to expand out the
llvm.umul.with.overflow calls that Clang generates to implement an
overflow check for C++'s new[] operator.

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3434
TEST=expand-mul-with-overflow.ll

Review URL: https://codereview.chromium.org/14649027

1 files changed, 1 insertions, 0 deletions

diff --git a/include/llvm/Transforms/NaCl.h b/include/llvm/Transforms/NaCl.h
index c324fa8c0c..af1dee2ebe 100644
--- a/include/llvm/Transforms/NaCl.h
+++ b/include/llvm/Transforms/NaCl.h
@@ -23,6 +23,7 @@ ModulePass *createExpandByValPass();
 FunctionPass *createExpandConstantExprPass();
 ModulePass *createExpandCtorsPass();
 BasicBlockPass *createExpandGetElementPtrPass();
+ModulePass *createExpandMulWithOverflowPass();
 ModulePass *createExpandTlsPass();
 ModulePass *createExpandTlsConstantExprPass();
 ModulePass *createExpandVarArgsPass();