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Make GVN able to remove unnecessary calls to read-only functions again.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@49842 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2008-04-17 05:36:50 +00:00
parent f231778269
commit 241f65321e
3 changed files with 32 additions and 19 deletions
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lib/Analysis/MemoryDependenceAnalysis.cpp
+1 -2
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@@ -134,8 +134,7 @@ Instruction* MemoryDependenceAnalysis::getCallSiteDependency(CallSite C,
} else if (isa<CallInst>(QI)) {
AliasAnalysis::ModRefBehavior result =
AA.getModRefBehavior(CallSite::get(QI));
if (result != AliasAnalysis::DoesNotAccessMemory &&
result != AliasAnalysis::OnlyReadsMemory) {
if (result != AliasAnalysis::DoesNotAccessMemory) {
if (!start && !block) {
cachedResult.first = QI;
cachedResult.second = true;