diff options
Diffstat (limited to 'lib/Transforms/Scalar/DCE.cpp')
| -rw-r--r-- | lib/Transforms/Scalar/DCE.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/Transforms/Scalar/DCE.cpp b/lib/Transforms/Scalar/DCE.cpp index 8dbcc23d7e..086f0a1a71 100644 --- a/lib/Transforms/Scalar/DCE.cpp +++ b/lib/Transforms/Scalar/DCE.cpp @@ -22,6 +22,7 @@ #include "llvm/Instruction.h" #include "llvm/Pass.h" #include "llvm/Support/InstIterator.h" +#include "llvm/Target/TargetLibraryInfo.h" #include "llvm/ADT/Statistic.h" using namespace llvm; @@ -38,10 +39,11 @@ namespace { initializeDeadInstEliminationPass(*PassRegistry::getPassRegistry()); } virtual bool runOnBasicBlock(BasicBlock &BB) { + TargetLibraryInfo *TLI = getAnalysisIfAvailable<TargetLibraryInfo>(); bool Changed = false; for (BasicBlock::iterator DI = BB.begin(); DI != BB.end(); ) { Instruction *Inst = DI++; - if (isInstructionTriviallyDead(Inst)) { + if (isInstructionTriviallyDead(Inst, TLI)) { Inst->eraseFromParent(); Changed = true; ++DIEEliminated; @@ -87,6 +89,8 @@ char DCE::ID = 0; INITIALIZE_PASS(DCE, "dce", "Dead Code Elimination", false, false) bool DCE::runOnFunction(Function &F) { + TargetLibraryInfo *TLI = getAnalysisIfAvailable<TargetLibraryInfo>(); + // Start out with all of the instructions in the worklist... std::vector<Instruction*> WorkList; for (inst_iterator i = inst_begin(F), e = inst_end(F); i != e; ++i) @@ -101,7 +105,7 @@ bool DCE::runOnFunction(Function &F) { Instruction *I = WorkList.back(); WorkList.pop_back(); - if (isInstructionTriviallyDead(I)) { // If the instruction is dead. + if (isInstructionTriviallyDead(I, TLI)) { // If the instruction is dead. // Loop over all of the values that the instruction uses, if there are // instructions being used, add them to the worklist, because they might // go dead after this one is removed. |