From 5aae3dcb53b89344d598eee7e1021dce7ec6345c Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Thu, 11 Nov 2010 16:21:47 +0000
Subject: [PATCH] Make Sink tbaa-aware.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118788 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Scalar/Sink.cpp               |  5 ++++-
 test/Analysis/TypeBasedAliasAnalysis/sink.ll | 20 ++++++++++++++++++++
 2 files changed, 24 insertions(+), 1 deletion(-)
 create mode 100644 test/Analysis/TypeBasedAliasAnalysis/sink.ll

diff --git a/lib/Transforms/Scalar/Sink.cpp b/lib/Transforms/Scalar/Sink.cpp
index d6f1e93a812..a54ba8e0ae5 100644
--- a/lib/Transforms/Scalar/Sink.cpp
+++ b/lib/Transforms/Scalar/Sink.cpp
@@ -15,6 +15,7 @@
 #define DEBUG_TYPE "sink"
 #include "llvm/Transforms/Scalar.h"
 #include "llvm/IntrinsicInst.h"
+#include "llvm/LLVMContext.h"
 #include "llvm/Analysis/Dominators.h"
 #include "llvm/Analysis/LoopInfo.h"
 #include "llvm/Analysis/AliasAnalysis.h"
@@ -158,9 +159,11 @@ static bool isSafeToMove(Instruction *Inst, AliasAnalysis *AA,
 
     Value *Ptr = L->getPointerOperand();
     uint64_t Size = AA->getTypeStoreSize(L->getType());
+    const MDNode *TBAAInfo = L->getMetadata(LLVMContext::MD_tbaa);
+    AliasAnalysis::Location Loc(Ptr, Size, TBAAInfo);
     for (SmallPtrSet<Instruction *, 8>::iterator I = Stores.begin(),
          E = Stores.end(); I != E; ++I)
-      if (AA->getModRefInfo(*I, Ptr, Size) & AliasAnalysis::Mod)
+      if (AA->getModRefInfo(*I, Loc) & AliasAnalysis::Mod)
         return false;
   }
 
diff --git a/test/Analysis/TypeBasedAliasAnalysis/sink.ll b/test/Analysis/TypeBasedAliasAnalysis/sink.ll
new file mode 100644
index 00000000000..e9bb61f602e
--- /dev/null
+++ b/test/Analysis/TypeBasedAliasAnalysis/sink.ll
@@ -0,0 +1,20 @@
+; RUN: opt -tbaa -enable-tbaa -sink -S < %s | FileCheck %s
+
+; CHECK: a:
+; CHECK:   %f = load float* %p, !tbaa !2
+; CHECK:   store float %f, float* %q
+
+define void @foo(float* %p, i1 %c, float* %q, float* %r) {
+  %f = load float* %p, !tbaa !0
+  store float 0.0, float* %r, !tbaa !1
+  br i1 %c, label %a, label %b
+a:
+  store float %f, float* %q
+  br label %b
+b:
+  ret void
+}
+
+!0 = metadata !{metadata !"A", metadata !2}
+!1 = metadata !{metadata !"B", metadata !2}
+!2 = metadata !{metadata !"test"}
-- 
2.34.1