From 8a2f2e17920a8501582cff72cc6fbf32b18f9d30 Mon Sep 17 00:00:00 2001 From: David Carlier Date: Fri, 22 Nov 2019 11:03:45 +0000 Subject: compiler plugins, just create const constants once. --- llvm_mode/afl-llvm-pass.so.cc | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'llvm_mode/afl-llvm-pass.so.cc') diff --git a/llvm_mode/afl-llvm-pass.so.cc b/llvm_mode/afl-llvm-pass.so.cc index 0c68136b..4ce073a5 100644 --- a/llvm_mode/afl-llvm-pass.so.cc +++ b/llvm_mode/afl-llvm-pass.so.cc @@ -150,6 +150,8 @@ bool AFLCoverage::runOnModule(Module &M) { M, Int32Ty, false, GlobalValue::ExternalLinkage, 0, "__afl_prev_loc", 0, GlobalVariable::GeneralDynamicTLSModel, 0, false); #endif + ConstantInt *Zero = ConstantInt::get(Int8Ty, 0); + ConstantInt *One = ConstantInt::get(Int8Ty, 1); /* Instrument all the things! */ @@ -287,7 +289,7 @@ bool AFLCoverage::runOnModule(Module &M) { LoadInst *Counter = IRB.CreateLoad(MapPtrIdx); Counter->setMetadata(M.getMDKindID("nosanitize"), MDNode::get(C, None)); - Value *Incr = IRB.CreateAdd(Counter, ConstantInt::get(Int8Ty, 1)); + Value *Incr = IRB.CreateAdd(Counter, One); #if LLVM_VERSION_MAJOR < 9 if (neverZero_counters_str != @@ -331,7 +333,7 @@ bool AFLCoverage::runOnModule(Module &M) { */ // this is the solution we choose because llvm9 should do the right // thing here - auto cf = IRB.CreateICmpEQ(Incr, ConstantInt::get(Int8Ty, 0)); + auto cf = IRB.CreateICmpEQ(Incr, Zero); auto carry = IRB.CreateZExt(cf, Int8Ty); Incr = IRB.CreateAdd(Incr, carry); /* -- cgit 1.4.1