Cache the result of Function::getIntrinsicID() in a DenseMap attached to the LLVMContext.
This reduces the time actually spent doing string to ID conversion and shows a 10% improvement in compile time for a particularly bad case that involves ARM Neon intrinsics (these have many overloads).
Patch by Jean-Luc Duprat!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176365 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/IR/Value.cpp b/lib/IR/Value.cpp
index 5bdce2b..adc702e 100644
--- a/lib/IR/Value.cpp
+++ b/lib/IR/Value.cpp
@@ -195,6 +195,9 @@
if (getSymTab(this, ST))
return; // Cannot set a name on this value (e.g. constant).
+ if (Function *F = dyn_cast<Function>(this))
+ getContext().pImpl->IntrinsicIDCache.erase(F);
+
if (!ST) { // No symbol table to update? Just do the change.
if (NameRef.empty()) {
// Free the name for this value.
@@ -307,7 +310,7 @@
// Notify all ValueHandles (if present) that this value is going away.
if (HasValueHandle)
ValueHandleBase::ValueIsRAUWd(this, New);
-
+
while (!use_empty()) {
Use &U = *UseList;
// Must handle Constants specially, we cannot call replaceUsesOfWith on a
@@ -318,10 +321,10 @@
continue;
}
}
-
+
U.set(New);
}
-
+
if (BasicBlock *BB = dyn_cast<BasicBlock>(this))
BB->replaceSuccessorsPhiUsesWith(cast<BasicBlock>(New));
}