IR: Provide an IRBuilder Inserter that calls a callback after insertion
Add a generalized IRBuilderCallbackInserter, which is just given a
callback to execute after insertion. This can be used to get rid of
the custom inserter in InstCombine, which will in turn allow me to add
target specific InstCombineCalls API for intrinsics without horrible
layering violations.
llvm-svn: 277784
diff --git a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
index 6e4c823..3126835 100644
--- a/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
@@ -3120,8 +3120,15 @@
/// Builder - This is an IRBuilder that automatically inserts new
/// instructions into the worklist when they are created.
- IRBuilder<TargetFolder, InstCombineIRInserter> Builder(
- F.getContext(), TargetFolder(DL), InstCombineIRInserter(Worklist, &AC));
+ IRBuilder<TargetFolder, IRBuilderCallbackInserter> Builder(
+ F.getContext(), TargetFolder(DL),
+ IRBuilderCallbackInserter([&Worklist, &AC](Instruction *I) {
+ Worklist.Add(I);
+
+ using namespace llvm::PatternMatch;
+ if (match(I, m_Intrinsic<Intrinsic::assume>()))
+ AC.registerAssumption(cast<CallInst>(I));
+ }));
// Lower dbg.declare intrinsics otherwise their value may be clobbered
// by instcombiner.