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| author | Eli Friedman <eli.friedman@gmail.com> | 2011-10-13 22:14:57 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2011-10-13 22:14:57 +0000 |
| commit | b414142036012dd9432c4e8c5fef09d4d49fcc22 (patch) | |
| tree | fa6b0cb06b5c1963e7b09bd5a9dd39809560cb93 /lib/Analysis/MemoryDependenceAnalysis.cpp | |
| parent | 48ba0e45ed68689ce7b384578e6272410e4e23fe (diff) | |
Enhance the memdep interface so that users can tell the difference between a dependency which cannot be calculated and a path reaching the entry point of the function. This patch introduces isNonFuncLocal, which replaces isUnknown in some cases.
Patch by Xiaoyi Guo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141896 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/MemoryDependenceAnalysis.cpp')
| -rw-r--r-- | lib/Analysis/MemoryDependenceAnalysis.cpp | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/lib/Analysis/MemoryDependenceAnalysis.cpp b/lib/Analysis/MemoryDependenceAnalysis.cpp index cdff85a513..92967c08dc 100644 --- a/lib/Analysis/MemoryDependenceAnalysis.cpp +++ b/lib/Analysis/MemoryDependenceAnalysis.cpp @@ -238,7 +238,7 @@ getCallSiteDependencyFrom(CallSite CS, bool isReadOnlyCall, // unknown, otherwise it is non-local. if (BB != &BB->getParent()->getEntryBlock()) return MemDepResult::getNonLocal(); - return MemDepResult::getUnknown(); + return MemDepResult::getNonFuncLocal(); } /// isLoadLoadClobberIfExtendedToFullWidth - Return true if LI is a load that @@ -499,7 +499,7 @@ getPointerDependencyFrom(const AliasAnalysis::Location &MemLoc, bool isLoad, // unknown, otherwise it is non-local. if (BB != &BB->getParent()->getEntryBlock()) return MemDepResult::getNonLocal(); - return MemDepResult::getUnknown(); + return MemDepResult::getNonFuncLocal(); } /// getDependency - Return the instruction on which a memory operation @@ -532,7 +532,7 @@ MemDepResult MemoryDependenceAnalysis::getDependency(Instruction *QueryInst) { if (QueryParent != &QueryParent->getParent()->getEntryBlock()) LocalCache = MemDepResult::getNonLocal(); else - LocalCache = MemDepResult::getUnknown(); + LocalCache = MemDepResult::getNonFuncLocal(); } else { AliasAnalysis::Location MemLoc; AliasAnalysis::ModRefResult MR = GetLocation(QueryInst, MemLoc, AA); @@ -688,7 +688,7 @@ MemoryDependenceAnalysis::getNonLocalCallDependency(CallSite QueryCS) { // a clobber, otherwise it is unknown. Dep = MemDepResult::getNonLocal(); } else { - Dep = MemDepResult::getUnknown(); + Dep = MemDepResult::getNonFuncLocal(); } // If we had a dirty entry for the block, update it. Otherwise, just add @@ -806,7 +806,7 @@ GetNonLocalInfoForBlock(const AliasAnalysis::Location &Loc, // If the block has a dependency (i.e. it isn't completely transparent to // the value), remember the reverse association because we just added it // to Cache! - if (Dep.isNonLocal() || Dep.isUnknown()) + if (!Dep.isDef() && !Dep.isClobber()) return Dep; // Keep the ReverseNonLocalPtrDeps map up to date so we can efficiently |