[llvm] r367748 - [Attributor] Fix dereferenceable callsite argument initialization

[Hideto Ueno via llvm-commits]

Author: uenoku
Date: Fri Aug  2 21:10:50 2019
New Revision: 367748

URL: http://llvm.org/viewvc/llvm-project?rev=367748&view=rev
Log:
[Attributor] Fix dereferenceable callsite argument initialization

Modified:
    llvm/trunk/lib/Transforms/IPO/Attributor.cpp

Modified: llvm/trunk/lib/Transforms/IPO/Attributor.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Transforms/IPO/Attributor.cpp?rev=367748&r1=367747&r2=367748&view=diff
==============================================================================
--- llvm/trunk/lib/Transforms/IPO/Attributor.cpp (original)
+++ llvm/trunk/lib/Transforms/IPO/Attributor.cpp Fri Aug  2 21:10:50 2019
@@ -2053,10 +2053,12 @@ struct AADereferenceableCallSiteArgument
   void initialize(Attributor &A) override {
     CallSite CS(&getAnchoredValue());
     if (CS.paramHasAttr(ArgNo, Attribute::Dereferenceable))
-      takeKnownDerefBytesMaximum(CS.getDereferenceableBytes(ArgNo));
+      takeKnownDerefBytesMaximum(
+          CS.getDereferenceableBytes(ArgNo + AttributeList::FirstArgIndex));
 
     if (CS.paramHasAttr(ArgNo, Attribute::DereferenceableOrNull))
-      takeKnownDerefBytesMaximum(CS.getDereferenceableOrNullBytes(ArgNo));
+      takeKnownDerefBytesMaximum(CS.getDereferenceableOrNullBytes(
+          ArgNo + AttributeList::FirstArgIndex));
   }
 
   /// See AbstractAttribute::updateImpl(Attributor &A).