From 7d27fc0252cb03b61c59b8a1e3307455c410266b Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Tue, 19 Apr 2005 19:16:19 +0000 Subject: [PATCH] Wrap some long lines. Make IPSCCP strip off dead constant exprs that are using functions, making them appear as though their address is taken. This allows us to propagate some more pool descriptors, lowering the overhead of pool alloc. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21363 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Transforms/Scalar/SCCP.cpp | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/lib/Transforms/Scalar/SCCP.cpp b/lib/Transforms/Scalar/SCCP.cpp index cc054128430..08504f42c64 100644 --- a/lib/Transforms/Scalar/SCCP.cpp +++ b/lib/Transforms/Scalar/SCCP.cpp @@ -1141,6 +1141,9 @@ ModulePass *llvm::createIPSCCPPass() { static bool AddressIsTaken(GlobalValue *GV) { + // Delete any dead constantexpr klingons. + GV->removeDeadConstantUsers(); + for (Value::use_iterator UI = GV->use_begin(), E = GV->use_end(); UI != E; ++UI) if (StoreInst *SI = dyn_cast(*UI)) { @@ -1173,7 +1176,8 @@ bool IPSCCP::runOnModule(Module &M) { if (!F->hasInternalLinkage() || AddressIsTaken(F)) { if (!F->isExternal()) Solver.MarkBlockExecutable(F->begin()); - for (Function::arg_iterator AI = F->arg_begin(), E = F->arg_end(); AI != E; ++AI) + for (Function::arg_iterator AI = F->arg_begin(), E = F->arg_end(); + AI != E; ++AI) Values[AI].markOverdefined(); } else { Solver.AddTrackedFunction(F); @@ -1182,7 +1186,8 @@ bool IPSCCP::runOnModule(Module &M) { // Loop over global variables. We inform the solver about any internal global // variables that do not have their 'addresses taken'. If they don't have // their addresses taken, we can propagate constants through them. - for (Module::global_iterator G = M.global_begin(), E = M.global_end(); G != E; ++G) + for (Module::global_iterator G = M.global_begin(), E = M.global_end(); + G != E; ++G) if (!G->isConstant() && G->hasInternalLinkage() && !AddressIsTaken(G)) Solver.TrackValueOfGlobalVariable(G); @@ -1204,7 +1209,8 @@ bool IPSCCP::runOnModule(Module &M) { // std::set &ExecutableBBs = Solver.getExecutableBlocks(); for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) { - for (Function::arg_iterator AI = F->arg_begin(), E = F->arg_end(); AI != E; ++AI) + for (Function::arg_iterator AI = F->arg_begin(), E = F->arg_end(); + AI != E; ++AI) if (!AI->use_empty()) { LatticeVal &IV = Values[AI]; if (IV.isConstant() || IV.isUndefined()) { -- 2.34.1