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compiler plugins, just create const constants once.

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This commit is contained in:
David Carlier
2019-11-22 11:03:45 +00:00
parent 79490e75be
commit 8a2f2e1792
3 changed files with 12 additions and 7 deletions
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6
llvm_mode/afl-llvm-pass.so.cc
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@ -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);
/*