commit 96bb3472058c709dc2f798d6e507235b1ffc2f89
author Hideto Ueno <uenoku.tokotoko@gmail.com> Sat Aug 03 04:10:50 2019 +0000
committer Hideto Ueno <uenoku.tokotoko@gmail.com> Sat Aug 03 04:10:50 2019 +0000
tree 057e873fbb82bc3867314279a030ac2ca68872a5
parent aa2810b6e74dcc7967b56fffe519d630370794a4

[Attributor] Fix dereferenceable callsite argument initialization

llvm-svn: 367748

llvm/lib/Transforms/IPO/Attributor.cpp

diff --git a/llvm/lib/Transforms/IPO/Attributor.cpp b/llvm/lib/Transforms/IPO/Attributor.cpp
index 88125a4..4a30859 100644
--- a/llvm/lib/Transforms/IPO/Attributor.cpp
+++ b/llvm/lib/Transforms/IPO/Attributor.cpp
@@ -2053,10 +2053,12 @@
   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).