commit 3fe4d3cb5bd5ea7948faeed8451b61380d928808
author Chris Lattner <sabre@nondot.org> Fri Apr 22 05:36:59 2005 +0000
committer Chris Lattner <sabre@nondot.org> Fri Apr 22 05:36:59 2005 +0000
tree 78de15c19a295b9867ac13a65602c42e00d4cfbf
parent 53f72b3bab0e8b474f6ded9ee46957fd89d01cda

Malloc/Free have mod/ref effects.  Do not allow CSE of function calls that
call malloc/free.  This fixes PR555.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21443 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/IPA/GlobalsModRef.cpp

diff --git a/lib/Analysis/IPA/GlobalsModRef.cpp b/lib/Analysis/IPA/GlobalsModRef.cpp
index 20422bf..5b3c953 100644
--- a/lib/Analysis/IPA/GlobalsModRef.cpp
+++ b/lib/Analysis/IPA/GlobalsModRef.cpp
@@ -310,6 +310,8 @@
           FunctionEffect |= Ref;
         else if (isa<StoreInst>(*II))
           FunctionEffect |= Mod;
+        else if (isa<MallocInst>(*II) || isa<FreeInst>(*II))
+          FunctionEffect |= ModRef;
   }
 
   if ((FunctionEffect & Mod) == 0)