[llvm] [AArch64] Tweak the costs of experimental_cttz_elts intrinsic (PR #125093)

David Sherwood via llvm-commits llvm-commits at lists.llvm.org
Thu Jan 30 08:52:18 PST 2025


https://github.com/david-arm created https://github.com/llvm/llvm-project/pull/125093

The experimental_cttz_elts intrinsic currently returns a cost
of 1 for all types, however we know that it currently requires
2 SVE instructions when lowering this - brkb and cntp. Both of
these instructions have a throughput that is half of a basic
vector instruction such as a vector add. This patch bumps the
cost of this intrinsic up to 4 to reflect two instructions of
lower throughput.

>From 6c7d1028427feb91d23cd6872646d40018d1d17a Mon Sep 17 00:00:00 2001
From: David Sherwood <david.sherwood at arm.com>
Date: Thu, 30 Jan 2025 16:49:34 +0000
Subject: [PATCH] [AArch64] Tweak the costs of experimental_cttz_elts intrinsic

The experimental_cttz_elts intrinsic currently returns a cost
of 1 for all types, however we know that it currently requires
2 SVE instructions when lowering this - brkb and cntp. Both
of these instructions have a throughput that is half of a
basic vector instruction such as a vector add. This patch bumps
the cost of this intrinsic up to 4 to reflect two instructions
of lower throughput.
---
 .../AArch64/AArch64TargetTransformInfo.cpp    |  10 ++
 .../Analysis/CostModel/AArch64/cttz_elts.ll   | 128 +++++++++---------
 2 files changed, 74 insertions(+), 64 deletions(-)

diff --git a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
index aae2fdaf5bec37b..a6edcf125782b2c 100644
--- a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
+++ b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
@@ -940,6 +940,16 @@ AArch64TTIImpl::getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
     }
     break;
   }
+  case Intrinsic::experimental_cttz_elts: {
+    EVT ArgVT = getTLI()->getValueType(DL, ICA.getArgTypes()[0]);
+    if (!getTLI()->shouldExpandCttzElements(ArgVT)) {
+      // This will consist of a SVE brkb and a cntp instruction. These
+      // typically have the same latency and half the throughput as a vector
+      // add instruction.
+      return 4;
+    }
+    break;
+  }
   default:
     break;
   }
diff --git a/llvm/test/Analysis/CostModel/AArch64/cttz_elts.ll b/llvm/test/Analysis/CostModel/AArch64/cttz_elts.ll
index 98d5bd5bd13f430..5a2d08a17fca47a 100644
--- a/llvm/test/Analysis/CostModel/AArch64/cttz_elts.ll
+++ b/llvm/test/Analysis/CostModel/AArch64/cttz_elts.ll
@@ -4,45 +4,45 @@
 define void @foo_no_vscale_range() {
 ; CHECK-LABEL: 'foo_no_vscale_range'
 ; CHECK-NEXT:  Cost Model: Invalid cost for instruction: %res.i64.nxv1i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv1i1(<vscale x 1 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv2i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv2i1(<vscale x 2 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv4i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv4i1(<vscale x 4 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv8i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv8i1(<vscale x 8 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv16i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv16i1(<vscale x 16 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv2i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv2i1(<vscale x 2 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv4i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv4i1(<vscale x 4 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv8i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv8i1(<vscale x 8 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv16i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv16i1(<vscale x 16 x i1> undef, i1 true)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 96 for instruction: %res.i64.nxv32i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv32i1(<vscale x 32 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv2i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv2i1(<vscale x 2 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv4i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv4i1(<vscale x 4 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv8i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv8i1(<vscale x 8 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv16i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv16i1(<vscale x 16 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv2i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv2i1(<vscale x 2 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv4i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv4i1(<vscale x 4 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv8i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv8i1(<vscale x 8 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv16i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv16i1(<vscale x 16 x i1> undef, i1 true)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 48 for instruction: %res.i32.nxv32i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv32i1(<vscale x 32 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.v2i1.zip = call i64 @llvm.experimental.cttz.elts.i64.v2i1(<2 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.v4i1.zip = call i64 @llvm.experimental.cttz.elts.i64.v4i1(<4 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.v8i1.zip = call i64 @llvm.experimental.cttz.elts.i64.v8i1(<8 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.v16i1.zip = call i64 @llvm.experimental.cttz.elts.i64.v16i1(<16 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.v2i1.zip = call i64 @llvm.experimental.cttz.elts.i64.v2i1(<2 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.v4i1.zip = call i64 @llvm.experimental.cttz.elts.i64.v4i1(<4 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.v8i1.zip = call i64 @llvm.experimental.cttz.elts.i64.v8i1(<8 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.v16i1.zip = call i64 @llvm.experimental.cttz.elts.i64.v16i1(<16 x i1> undef, i1 true)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 12 for instruction: %res.i64.v32i1.zip = call i64 @llvm.experimental.cttz.elts.i64.v32i1(<32 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.v2i1.zip = call i32 @llvm.experimental.cttz.elts.i32.v2i1(<2 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.v4i1.zip = call i32 @llvm.experimental.cttz.elts.i32.v4i1(<4 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.v8i1.zip = call i32 @llvm.experimental.cttz.elts.i32.v8i1(<8 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.v16i1.zip = call i32 @llvm.experimental.cttz.elts.i32.v16i1(<16 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.v2i1.zip = call i32 @llvm.experimental.cttz.elts.i32.v2i1(<2 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.v4i1.zip = call i32 @llvm.experimental.cttz.elts.i32.v4i1(<4 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.v8i1.zip = call i32 @llvm.experimental.cttz.elts.i32.v8i1(<8 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.v16i1.zip = call i32 @llvm.experimental.cttz.elts.i32.v16i1(<16 x i1> undef, i1 true)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 12 for instruction: %res.i32.v32i1.zip = call i32 @llvm.experimental.cttz.elts.i32.v32i1(<32 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv2i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv2i1(<vscale x 2 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv4i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv4i1(<vscale x 4 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv8i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv8i1(<vscale x 8 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv16i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv16i1(<vscale x 16 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv2i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv2i1(<vscale x 2 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv4i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv4i1(<vscale x 4 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv8i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv8i1(<vscale x 8 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv16i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv16i1(<vscale x 16 x i1> undef, i1 false)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 96 for instruction: %res.i64.nxv32i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv32i1(<vscale x 32 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv2i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv2i1(<vscale x 2 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv4i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv4i1(<vscale x 4 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv8i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv8i1(<vscale x 8 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv16i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv16i1(<vscale x 16 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv2i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv2i1(<vscale x 2 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv4i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv4i1(<vscale x 4 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv8i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv8i1(<vscale x 8 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv16i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv16i1(<vscale x 16 x i1> undef, i1 false)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 48 for instruction: %res.i32.nxv32i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv32i1(<vscale x 32 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.v2i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.v2i1(<2 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.v4i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.v4i1(<4 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.v8i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.v8i1(<8 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.v16i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.v16i1(<16 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.v2i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.v2i1(<2 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.v4i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.v4i1(<4 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.v8i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.v8i1(<8 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.v16i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.v16i1(<16 x i1> undef, i1 false)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 12 for instruction: %res.i64.v32i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.v32i1(<32 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.v2i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.v2i1(<2 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.v4i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.v4i1(<4 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.v8i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.v8i1(<8 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.v16i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.v16i1(<16 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.v2i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.v2i1(<2 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.v4i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.v4i1(<4 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.v8i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.v8i1(<8 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.v16i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.v16i1(<16 x i1> undef, i1 false)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 12 for instruction: %res.i32.v32i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.v32i1(<32 x i1> undef, i1 false)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 0 for instruction: ret void
 ;
@@ -97,25 +97,25 @@ define void @foo_no_vscale_range() {
 
 define void @foo_vscale_range_1_16() vscale_range(1,16) {
 ; CHECK-LABEL: 'foo_vscale_range_1_16'
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv2i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv2i1(<vscale x 2 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv4i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv4i1(<vscale x 4 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv8i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv8i1(<vscale x 8 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv16i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv16i1(<vscale x 16 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv2i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv2i1(<vscale x 2 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv4i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv4i1(<vscale x 4 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv8i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv8i1(<vscale x 8 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv16i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv16i1(<vscale x 16 x i1> undef, i1 true)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 24 for instruction: %res.i64.nxv32i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv32i1(<vscale x 32 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv2i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv2i1(<vscale x 2 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv4i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv4i1(<vscale x 4 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv8i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv8i1(<vscale x 8 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv16i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv16i1(<vscale x 16 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv2i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv2i1(<vscale x 2 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv4i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv4i1(<vscale x 4 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv8i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv8i1(<vscale x 8 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv16i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv16i1(<vscale x 16 x i1> undef, i1 true)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 24 for instruction: %res.i32.nxv32i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv32i1(<vscale x 32 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv2i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv2i1(<vscale x 2 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv4i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv4i1(<vscale x 4 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv8i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv8i1(<vscale x 8 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv16i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv16i1(<vscale x 16 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv2i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv2i1(<vscale x 2 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv4i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv4i1(<vscale x 4 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv8i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv8i1(<vscale x 8 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv16i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv16i1(<vscale x 16 x i1> undef, i1 false)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 24 for instruction: %res.i64.nxv32i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv32i1(<vscale x 32 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv2i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv2i1(<vscale x 2 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv4i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv4i1(<vscale x 4 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv8i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv8i1(<vscale x 8 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv16i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv16i1(<vscale x 16 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv2i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv2i1(<vscale x 2 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv4i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv4i1(<vscale x 4 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv8i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv8i1(<vscale x 8 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv16i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv16i1(<vscale x 16 x i1> undef, i1 false)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 24 for instruction: %res.i32.nxv32i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv32i1(<vscale x 32 x i1> undef, i1 false)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 0 for instruction: ret void
 ;
@@ -146,25 +146,25 @@ define void @foo_vscale_range_1_16() vscale_range(1,16) {
 
 define void @foo_vscale_range_1_16384() vscale_range(1,16384) {
 ; CHECK-LABEL: 'foo_vscale_range_1_16384'
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv2i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv2i1(<vscale x 2 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv4i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv4i1(<vscale x 4 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv8i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv8i1(<vscale x 8 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv16i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv16i1(<vscale x 16 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv2i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv2i1(<vscale x 2 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv4i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv4i1(<vscale x 4 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv8i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv8i1(<vscale x 8 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv16i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv16i1(<vscale x 16 x i1> undef, i1 true)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 48 for instruction: %res.i64.nxv32i1.zip = call i64 @llvm.experimental.cttz.elts.i64.nxv32i1(<vscale x 32 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv2i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv2i1(<vscale x 2 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv4i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv4i1(<vscale x 4 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv8i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv8i1(<vscale x 8 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv16i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv16i1(<vscale x 16 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv2i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv2i1(<vscale x 2 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv4i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv4i1(<vscale x 4 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv8i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv8i1(<vscale x 8 x i1> undef, i1 true)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv16i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv16i1(<vscale x 16 x i1> undef, i1 true)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 48 for instruction: %res.i32.nxv32i1.zip = call i32 @llvm.experimental.cttz.elts.i32.nxv32i1(<vscale x 32 x i1> undef, i1 true)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv2i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv2i1(<vscale x 2 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv4i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv4i1(<vscale x 4 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv8i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv8i1(<vscale x 8 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i64.nxv16i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv16i1(<vscale x 16 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv2i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv2i1(<vscale x 2 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv4i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv4i1(<vscale x 4 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv8i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv8i1(<vscale x 8 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i64.nxv16i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv16i1(<vscale x 16 x i1> undef, i1 false)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 48 for instruction: %res.i64.nxv32i1.nzip = call i64 @llvm.experimental.cttz.elts.i64.nxv32i1(<vscale x 32 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv2i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv2i1(<vscale x 2 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv4i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv4i1(<vscale x 4 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv8i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv8i1(<vscale x 8 x i1> undef, i1 false)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %res.i32.nxv16i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv16i1(<vscale x 16 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv2i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv2i1(<vscale x 2 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv4i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv4i1(<vscale x 4 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv8i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv8i1(<vscale x 8 x i1> undef, i1 false)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %res.i32.nxv16i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv16i1(<vscale x 16 x i1> undef, i1 false)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 48 for instruction: %res.i32.nxv32i1.nzip = call i32 @llvm.experimental.cttz.elts.i32.nxv32i1(<vscale x 32 x i1> undef, i1 false)
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 0 for instruction: ret void
 ;



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