[llvm] Revert "[WebAssembly] Mark extract.last.active as having invalid cost." (PR #180942)

[Benjamin Maxwell via llvm-commits]

https://github.com/MacDue created https://github.com/llvm/llvm-project/pull/180942

The failures should have been resolved with #180290 (which also added WebAssembly tests).

This reverts commit 811fb223af2b3e2d68c99b346f4b75dcf3de3417.

>From 045b1c65063175e0f6d017152d554f937b8d3855 Mon Sep 17 00:00:00 2001
From: Benjamin Maxwell <benjamin.maxwell at arm.com>
Date: Wed, 11 Feb 2026 13:28:11 +0000
Subject: [PATCH] Revert "[WebAssembly] Mark extract.last.active as having
 invalid cost."

The failures should have been resolved with #180290 (which also added
WebAssembly tests).

This reverts commit 811fb223af2b3e2d68c99b346f4b75dcf3de3417.
---
 .../WebAssembly/WebAssemblyTargetTransformInfo.cpp  | 13 -------------
 .../WebAssembly/WebAssemblyTargetTransformInfo.h    |  4 ----
 2 files changed, 17 deletions(-)

diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyTargetTransformInfo.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyTargetTransformInfo.cpp
index 33498805112c0..f058d734bcb87 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyTargetTransformInfo.cpp
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyTargetTransformInfo.cpp
@@ -453,19 +453,6 @@ InstructionCost WebAssemblyTTIImpl::getPartialReductionCost(
   return Invalid;
 }
 
-InstructionCost
-WebAssemblyTTIImpl::getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
-                                          TTI::TargetCostKind CostKind) const {
-  switch (ICA.getID()) {
-  case Intrinsic::experimental_vector_extract_last_active:
-    // TODO: Remove once the intrinsic can be lowered without crashes.
-    return InstructionCost::getInvalid();
-  default:
-    break;
-  }
-  return BaseT::getIntrinsicInstrCost(ICA, CostKind);
-}
-
 TTI::ReductionShuffle WebAssemblyTTIImpl::getPreferredExpandedReductionShuffle(
     const IntrinsicInst *II) const {
 
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyTargetTransformInfo.h b/llvm/lib/Target/WebAssembly/WebAssemblyTargetTransformInfo.h
index 924249e051321..9b6de65f17c7f 100644
--- a/llvm/lib/Target/WebAssembly/WebAssemblyTargetTransformInfo.h
+++ b/llvm/lib/Target/WebAssembly/WebAssemblyTargetTransformInfo.h
@@ -98,10 +98,6 @@ class WebAssemblyTTIImpl final : public BasicTTIImplBase<WebAssemblyTTIImpl> {
       TTI::TargetCostKind CostKind,
       std::optional<FastMathFlags> FMF) const override;
 
-  InstructionCost
-  getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
-                        TTI::TargetCostKind CostKind) const override;
-
   TTI::ReductionShuffle
   getPreferredExpandedReductionShuffle(const IntrinsicInst *II) const override;