PNaCl: Extend ExpandMulWithOverflow pass to handle uadd.with.overflow too

It turned out that umul.with.overflow wasn't the only *.with.overflow
intrinsic usage introduced by Clang.

I knew that Clang's CGExprCXX.cpp generates umul.with.overflow for an
overflow check for C++'s "new Foo[]".  The same code for handling "new
Foo[]" also generates uadd.with.overflow in some cases.  This happens
if class Foo has a destructor or a delete[] operator that takes a size
argument.  In those cases, the C++ ABI adds a "cookie" to the
allocation which contains the array's size.

Rename the pass to "ExpandArithWithOverflow" and rename files
accordingly.

Also enable the pass.

BUG=https://code.google.com/p/nativeclient/issues/detail?id=3434
TEST=*.ll tests + trybots + GCC torture tests

Review URL: https://codereview.chromium.org/15688011

1 files changed, 1 insertions, 1 deletions

diff --git a/include/llvm/Transforms/NaCl.h b/include/llvm/Transforms/NaCl.h
index f42336fc67..92838e5fc7 100644
--- a/include/llvm/Transforms/NaCl.h
+++ b/include/llvm/Transforms/NaCl.h
@@ -21,11 +21,11 @@ class Use;
 class Value;
 
 ModulePass *createAddPNaClExternalDeclsPass();
+ModulePass *createExpandArithWithOverflowPass();
 ModulePass *createExpandByValPass();
 FunctionPass *createExpandConstantExprPass();
 ModulePass *createExpandCtorsPass();
 BasicBlockPass *createExpandGetElementPtrPass();
-ModulePass *createExpandMulWithOverflowPass();
 ModulePass *createExpandTlsPass();
 ModulePass *createExpandTlsConstantExprPass();
 ModulePass *createExpandVarArgsPass();