llvm: Add support for "-fno-delete-null-pointer-checks"

Summary:
Support for this option is needed for building Linux kernel.
This is a very frequently requested feature by kernel developers.

More details : https://lkml.org/lkml/2018/4/4/601

GCC option description for -fdelete-null-pointer-checks:
This Assume that programs cannot safely dereference null pointers,
and that no code or data element resides at address zero.

-fno-delete-null-pointer-checks is the inverse of this implying that
null pointer dereferencing is not undefined.

This feature is implemented in LLVM IR in this CL as the function attribute
"null-pointer-is-valid"="true" in IR (Under review at D47894).
The CL updates several passes that assumed null pointer dereferencing is
undefined to not optimize when the "null-pointer-is-valid"="true"
attribute is present.

Reviewers: t.p.northover, efriedma, jyknight, chandlerc, rnk, srhines, void, george.burgess.iv

Reviewed By: efriedma, george.burgess.iv

Subscribers: eraman, haicheng, george.burgess.iv, drinkcat, theraven, reames, sanjoy, xbolva00, llvm-commits

Differential Revision: https://reviews.llvm.org/D47895

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@336613 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 2 insertions, 2 deletions

diff --git a/unittests/Analysis/AliasAnalysisTest.cpp b/unittests/Analysis/AliasAnalysisTest.cpp
index f1294eb5b7e..0f0d44f6c78 100644
--- a/unittests/Analysis/AliasAnalysisTest.cpp
+++ b/unittests/Analysis/AliasAnalysisTest.cpp
@@ -156,7 +156,7 @@ protected:
 
     // Build the various AA results and register them.
     AC.reset(new AssumptionCache(F));
-    BAR.reset(new BasicAAResult(M.getDataLayout(), TLI, *AC));
+    BAR.reset(new BasicAAResult(M.getDataLayout(), F, TLI, *AC));
     AAR->addAAResult(*BAR);
 
     return *AAR;
diff --git a/unittests/Analysis/MemorySSA.cpp b/unittests/Analysis/MemorySSA.cpp
index c93c0d34307..1a1675faca1 100644
--- a/unittests/Analysis/MemorySSA.cpp
+++ b/unittests/Analysis/MemorySSA.cpp
@@ -50,7 +50,7 @@ protected:
 
     TestAnalyses(MemorySSATest &Test)
         : DT(*Test.F), AC(*Test.F), AA(Test.TLI),
-          BAA(Test.DL, Test.TLI, AC, &DT) {
+          BAA(Test.DL, *Test.F, Test.TLI, AC, &DT) {
       AA.addAAResult(BAA);
       MSSA = make_unique<MemorySSA>(*Test.F, &AA, &DT);
       Walker = MSSA->getWalker();