[llvm-commits] CVS: llvm/include/llvm/Analysis/AliasAnalysis.h

[Chris Lattner]

Changes in directory llvm/include/llvm/Analysis:

AliasAnalysis.h updated: 1.19 -> 1.20
---
Log message:

if a function doesn't access memory at all, it definitely doesn't read it.


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Diffs of the changes:  (+2 -1)

 AliasAnalysis.h |    3 ++-
 1 files changed, 2 insertions(+), 1 deletion(-)


Index: llvm/include/llvm/Analysis/AliasAnalysis.h
diff -u llvm/include/llvm/Analysis/AliasAnalysis.h:1.19 llvm/include/llvm/Analysis/AliasAnalysis.h:1.20
--- llvm/include/llvm/Analysis/AliasAnalysis.h:1.19	Fri Dec 17 11:02:54 2004
+++ llvm/include/llvm/Analysis/AliasAnalysis.h	Wed Mar 23 17:27:34 2005
@@ -214,7 +214,8 @@
   bool onlyReadsMemory(Function *F) {
     /// FIXME: If the analysis returns more precise info, we can reduce it to
     /// this.
-    return getModRefBehavior(F, CallSite()) == OnlyReadsMemory;
+    ModRefBehavior MRB = getModRefBehavior(F, CallSite());
+    return MRB == DoesNotAccessMemory || MRB == OnlyReadsMemory;
   }