Revert "[llvm][IR] Extend BranchWeightMetadata to track provenance of weights" (#95060)

Reverts llvm/llvm-project#86609

This change causes compile-time regressions for stage2 builds
(https://llvm-compile-time-tracker.com/compare.php?from=3254f31a66263ea9647c9547f1531c3123444fcd&to=c5978f1eb5eeca8610b9dfce1fcbf1f473911cd8&stat=instructions:u).
It also introduced unintended changes to `.text` which should be
addressed before relanding.

1 files changed, 2 insertions, 2 deletions

diff --git a/llvm/lib/Transforms/Utils/LoopPeel.cpp b/llvm/lib/Transforms/Utils/LoopPeel.cpp
index d517ec3..e251693 100644
--- a/llvm/lib/Transforms/Utils/LoopPeel.cpp
+++ b/llvm/lib/Transforms/Utils/LoopPeel.cpp
@@ -680,7 +680,7 @@ struct WeightInfo {
 /// To avoid dealing with division rounding we can just multiple both part
 /// of weights to E and use weight as (F - I * E, E).
 static void updateBranchWeights(Instruction *Term, WeightInfo &Info) {
-  setBranchWeights(*Term, Info.Weights, /*IsExpected=*/false);
+  setBranchWeights(*Term, Info.Weights);
   for (auto [Idx, SubWeight] : enumerate(Info.SubWeights))
     if (SubWeight != 0)
       // Don't set the probability of taking the edge from latch to loop header
@@ -1073,7 +1073,7 @@ bool llvm::peelLoop(Loop *L, unsigned PeelCount, LoopInfo *LI,
   }
 
   for (const auto &[Term, Info] : Weights) {
-    setBranchWeights(*Term, Info.Weights, /*IsExpected=*/false);
+    setBranchWeights(*Term, Info.Weights);
   }
 
   // Update Metadata for count of peeled off iterations.