[NFC] Pass the instruction delta to emitInstrCountChangedRemark

Instead of counting the size of the entire module every time we run a pass,
pass along a delta instead and use that to emit the remark.

This means we only have to use (on average) smaller IR units to calculate
instruction counts. E.g, in a BB pass, we only need to look at the delta of
the BB instead of the delta of the entire module.

6/6

(This improved compile time for size remarks on sqlite3 + O2 significantly)

llvm-svn: 341250

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/Analysis/LoopPass.cpp b/llvm/lib/Analysis/LoopPass.cpp
index 191d5f0f4ad..f60b1815ce4 100644
--- a/llvm/lib/Analysis/LoopPass.cpp
+++ b/llvm/lib/Analysis/LoopPass.cpp
@@ -224,9 +224,9 @@ bool LPPassManager::runOnFunction(Function &F) {
           // Update the size of the function, emit a remark, and update the
           // size of the module.
           if (NewSize != FunctionSize) {
-            emitInstrCountChangedRemark(P, M, InstrCount);
             int64_t Delta = static_cast<int64_t>(NewSize) -
                             static_cast<int64_t>(FunctionSize);
+            emitInstrCountChangedRemark(P, M, Delta, InstrCount);
             InstrCount = static_cast<int64_t>(InstrCount) + Delta;
             FunctionSize = NewSize;
           }