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Make it illegal to call getDependency* on non-memory instructions

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like binary operators.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60600 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-12-05 18:46:19 +00:00
parent 650d7f3ff4
commit 6951381995
2 changed files with 6 additions and 4 deletions
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3
include/llvm/Analysis/MemoryDependenceAnalysis.h
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@ -180,7 +180,8 @@ namespace llvm {
virtual void getAnalysisUsage(AnalysisUsage &AU) const; virtual void getAnalysisUsage(AnalysisUsage &AU) const;
/// getDependency - Return the instruction on which a memory operation /// getDependency - Return the instruction on which a memory operation
/// depends. See the class comment for more details. /// depends. See the class comment for more details. It is illegal to call
/// this on non-memory instructions.
MemDepResult getDependency(Instruction *QueryInst); MemDepResult getDependency(Instruction *QueryInst);
/// getDependencyFrom - Return the instruction on which the memory operation /// getDependencyFrom - Return the instruction on which the memory operation

7
lib/Analysis/MemoryDependenceAnalysis.cpp
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@ -118,10 +118,11 @@ getDependencyFrom(Instruction *QueryInst, BasicBlock::iterator ScanIt,
MemPtr = F->getPointerOperand(); MemPtr = F->getPointerOperand();
// FreeInsts erase the entire structure, not just a field. // FreeInsts erase the entire structure, not just a field.
MemSize = ~0UL; MemSize = ~0UL;
} else if (isa<CallInst>(QueryInst) || isa<InvokeInst>(QueryInst)) } else {
assert((isa<CallInst>(QueryInst) || isa<InvokeInst>(QueryInst)) &&
"Can only get dependency info for memory instructions!");
return getCallSiteDependency(CallSite::get(QueryInst), ScanIt, BB); return getCallSiteDependency(CallSite::get(QueryInst), ScanIt, BB);
else // Non-memory instructions depend on nothing. }
return MemDepResult::getNone();
// Walk backwards through the basic block, looking for dependencies // Walk backwards through the basic block, looking for dependencies
while (ScanIt != BB->begin()) { while (ScanIt != BB->begin()) {