[llvm] dcefcd5 - [ARM] Update trunc costs
David Green via llvm-commits
llvm-commits at lists.llvm.org
Mon Jan 11 00:59:45 PST 2021
Author: David Green
Date: 2021-01-11T08:59:28Z
New Revision: dcefcd51e01741c79c9d9a729fe803b13287a372
URL: https://github.com/llvm/llvm-project/commit/dcefcd51e01741c79c9d9a729fe803b13287a372
DIFF: https://github.com/llvm/llvm-project/commit/dcefcd51e01741c79c9d9a729fe803b13287a372.diff
LOG: [ARM] Update trunc costs
We did not have specific costs for larger than legal truncates that were
not otherwise cheap (where they were next to stores, for example). As
MVE does not have a dedicated instruction for them (and we do not use
loads/stores yet), they should be expensive as they get expanded to a
series of lane moves.
Differential Revision: https://reviews.llvm.org/D94260
Added:
Modified:
llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
llvm/test/Analysis/CostModel/ARM/arith-overflow.ll
llvm/test/Analysis/CostModel/ARM/cast.ll
llvm/test/Analysis/CostModel/ARM/mve-gather-scatter-cost.ll
Removed:
################################################################################
diff --git a/llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp b/llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
index 0dc0afe271d1..a75c771e66be 100644
--- a/llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
+++ b/llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
@@ -491,6 +491,7 @@ int ARMTTIImpl::getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src,
{ISD::TRUNCATE, MVT::v4i32, MVT::v4i8, 0},
{ISD::TRUNCATE, MVT::v8i16, MVT::v8i8, 0},
{ISD::TRUNCATE, MVT::v8i32, MVT::v8i16, 1},
+ {ISD::TRUNCATE, MVT::v8i32, MVT::v8i8, 1},
{ISD::TRUNCATE, MVT::v16i32, MVT::v16i8, 3},
{ISD::TRUNCATE, MVT::v16i16, MVT::v16i8, 1},
};
@@ -751,6 +752,18 @@ int ARMTTIImpl::getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src,
return Lanes * CallCost;
}
+ if (ISD == ISD::TRUNCATE && ST->hasMVEIntegerOps() &&
+ SrcTy.isFixedLengthVector()) {
+ // Treat a truncate with larger than legal source (128bits for MVE) as
+ // expensive, 2 instructions per lane.
+ if ((SrcTy.getScalarType() == MVT::i8 ||
+ SrcTy.getScalarType() == MVT::i16 ||
+ SrcTy.getScalarType() == MVT::i32) &&
+ SrcTy.getSizeInBits() > 128 &&
+ SrcTy.getSizeInBits() > DstTy.getSizeInBits())
+ return SrcTy.getVectorNumElements() * 2;
+ }
+
// Scalar integer conversion costs.
static const TypeConversionCostTblEntry ARMIntegerConversionTbl[] = {
// i16 -> i64 requires two dependent operations.
diff --git a/llvm/test/Analysis/CostModel/ARM/arith-overflow.ll b/llvm/test/Analysis/CostModel/ARM/arith-overflow.ll
index 25b268b9b244..172df8600356 100644
--- a/llvm/test/Analysis/CostModel/ARM/arith-overflow.ll
+++ b/llvm/test/Analysis/CostModel/ARM/arith-overflow.ll
@@ -707,13 +707,13 @@ define i32 @smul(i32 %arg) {
; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 316 for instruction: %V8I32 = call { <8 x i32>, <8 x i1> } @llvm.smul.with.overflow.v8i32(<8 x i32> undef, <8 x i32> undef)
; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 1208 for instruction: %V16I32 = call { <16 x i32>, <16 x i1> } @llvm.smul.with.overflow.v16i32(<16 x i32> undef, <16 x i32> undef)
; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 6 for instruction: %I16 = call { i16, i1 } @llvm.smul.with.overflow.i16(i16 undef, i16 undef)
-; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 34 for instruction: %V8I16 = call { <8 x i16>, <8 x i1> } @llvm.smul.with.overflow.v8i16(<8 x i16> undef, <8 x i16> undef)
-; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 116 for instruction: %V16I16 = call { <16 x i16>, <16 x i1> } @llvm.smul.with.overflow.v16i16(<16 x i16> undef, <16 x i16> undef)
-; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 424 for instruction: %V32I16 = call { <32 x i16>, <32 x i1> } @llvm.smul.with.overflow.v32i16(<32 x i16> undef, <32 x i16> undef)
+; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 62 for instruction: %V8I16 = call { <8 x i16>, <8 x i1> } @llvm.smul.with.overflow.v8i16(<8 x i16> undef, <8 x i16> undef)
+; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 164 for instruction: %V16I16 = call { <16 x i16>, <16 x i1> } @llvm.smul.with.overflow.v16i16(<16 x i16> undef, <16 x i16> undef)
+; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 488 for instruction: %V32I16 = call { <32 x i16>, <32 x i1> } @llvm.smul.with.overflow.v32i16(<32 x i16> undef, <32 x i16> undef)
; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 6 for instruction: %I8 = call { i8, i1 } @llvm.smul.with.overflow.i8(i8 undef, i8 undef)
-; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 34 for instruction: %V16I8 = call { <16 x i8>, <16 x i1> } @llvm.smul.with.overflow.v16i8(<16 x i8> undef, <16 x i8> undef)
-; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 116 for instruction: %V32I8 = call { <32 x i8>, <32 x i1> } @llvm.smul.with.overflow.v32i8(<32 x i8> undef, <32 x i8> undef)
-; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 424 for instruction: %V64I8 = call { <64 x i8>, <64 x i1> } @llvm.smul.with.overflow.v64i8(<64 x i8> undef, <64 x i8> undef)
+; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 94 for instruction: %V16I8 = call { <16 x i8>, <16 x i1> } @llvm.smul.with.overflow.v16i8(<16 x i8> undef, <16 x i8> undef)
+; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 228 for instruction: %V32I8 = call { <32 x i8>, <32 x i1> } @llvm.smul.with.overflow.v32i8(<32 x i8> undef, <32 x i8> undef)
+; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 616 for instruction: %V64I8 = call { <64 x i8>, <64 x i1> } @llvm.smul.with.overflow.v64i8(<64 x i8> undef, <64 x i8> undef)
; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret i32 undef
;
; V8M-SIZE-LABEL: 'smul'
@@ -764,13 +764,13 @@ define i32 @smul(i32 %arg) {
; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 153 for instruction: %V8I32 = call { <8 x i32>, <8 x i1> } @llvm.smul.with.overflow.v8i32(<8 x i32> undef, <8 x i32> undef)
; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 557 for instruction: %V16I32 = call { <16 x i32>, <16 x i1> } @llvm.smul.with.overflow.v16i32(<16 x i32> undef, <16 x i32> undef)
; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 6 for instruction: %I16 = call { i16, i1 } @llvm.smul.with.overflow.i16(i16 undef, i16 undef)
-; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 9 for instruction: %V8I16 = call { <8 x i16>, <8 x i1> } @llvm.smul.with.overflow.v8i16(<8 x i16> undef, <8 x i16> undef)
-; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 13 for instruction: %V16I16 = call { <16 x i16>, <16 x i1> } @llvm.smul.with.overflow.v16i16(<16 x i16> undef, <16 x i16> undef)
-; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 21 for instruction: %V32I16 = call { <32 x i16>, <32 x i1> } @llvm.smul.with.overflow.v32i16(<32 x i16> undef, <32 x i16> undef)
+; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 39 for instruction: %V8I16 = call { <8 x i16>, <8 x i1> } @llvm.smul.with.overflow.v8i16(<8 x i16> undef, <8 x i16> undef)
+; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 75 for instruction: %V16I16 = call { <16 x i16>, <16 x i1> } @llvm.smul.with.overflow.v16i16(<16 x i16> undef, <16 x i16> undef)
+; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 147 for instruction: %V32I16 = call { <32 x i16>, <32 x i1> } @llvm.smul.with.overflow.v32i16(<32 x i16> undef, <32 x i16> undef)
; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 6 for instruction: %I8 = call { i8, i1 } @llvm.smul.with.overflow.i8(i8 undef, i8 undef)
-; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 9 for instruction: %V16I8 = call { <16 x i8>, <16 x i1> } @llvm.smul.with.overflow.v16i8(<16 x i8> undef, <16 x i8> undef)
-; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 13 for instruction: %V32I8 = call { <32 x i8>, <32 x i1> } @llvm.smul.with.overflow.v32i8(<32 x i8> undef, <32 x i8> undef)
-; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 21 for instruction: %V64I8 = call { <64 x i8>, <64 x i1> } @llvm.smul.with.overflow.v64i8(<64 x i8> undef, <64 x i8> undef)
+; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 71 for instruction: %V16I8 = call { <16 x i8>, <16 x i1> } @llvm.smul.with.overflow.v16i8(<16 x i8> undef, <16 x i8> undef)
+; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 139 for instruction: %V32I8 = call { <32 x i8>, <32 x i1> } @llvm.smul.with.overflow.v32i8(<32 x i8> undef, <32 x i8> undef)
+; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 275 for instruction: %V64I8 = call { <64 x i8>, <64 x i1> } @llvm.smul.with.overflow.v64i8(<64 x i8> undef, <64 x i8> undef)
; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: ret i32 undef
;
%I64 = call {i64, i1} @llvm.smul.with.overflow.i64(i64 undef, i64 undef)
@@ -865,13 +865,13 @@ define i32 @umul(i32 %arg) {
; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 312 for instruction: %V8I32 = call { <8 x i32>, <8 x i1> } @llvm.umul.with.overflow.v8i32(<8 x i32> undef, <8 x i32> undef)
; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 1200 for instruction: %V16I32 = call { <16 x i32>, <16 x i1> } @llvm.umul.with.overflow.v16i32(<16 x i32> undef, <16 x i32> undef)
; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 5 for instruction: %I16 = call { i16, i1 } @llvm.umul.with.overflow.i16(i16 undef, i16 undef)
-; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 32 for instruction: %V8I16 = call { <8 x i16>, <8 x i1> } @llvm.umul.with.overflow.v8i16(<8 x i16> undef, <8 x i16> undef)
-; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 112 for instruction: %V16I16 = call { <16 x i16>, <16 x i1> } @llvm.umul.with.overflow.v16i16(<16 x i16> undef, <16 x i16> undef)
-; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 416 for instruction: %V32I16 = call { <32 x i16>, <32 x i1> } @llvm.umul.with.overflow.v32i16(<32 x i16> undef, <32 x i16> undef)
+; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 60 for instruction: %V8I16 = call { <8 x i16>, <8 x i1> } @llvm.umul.with.overflow.v8i16(<8 x i16> undef, <8 x i16> undef)
+; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 160 for instruction: %V16I16 = call { <16 x i16>, <16 x i1> } @llvm.umul.with.overflow.v16i16(<16 x i16> undef, <16 x i16> undef)
+; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 480 for instruction: %V32I16 = call { <32 x i16>, <32 x i1> } @llvm.umul.with.overflow.v32i16(<32 x i16> undef, <32 x i16> undef)
; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 5 for instruction: %I8 = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 undef, i8 undef)
-; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 32 for instruction: %V16I8 = call { <16 x i8>, <16 x i1> } @llvm.umul.with.overflow.v16i8(<16 x i8> undef, <16 x i8> undef)
-; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 112 for instruction: %V32I8 = call { <32 x i8>, <32 x i1> } @llvm.umul.with.overflow.v32i8(<32 x i8> undef, <32 x i8> undef)
-; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 416 for instruction: %V64I8 = call { <64 x i8>, <64 x i1> } @llvm.umul.with.overflow.v64i8(<64 x i8> undef, <64 x i8> undef)
+; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 92 for instruction: %V16I8 = call { <16 x i8>, <16 x i1> } @llvm.umul.with.overflow.v16i8(<16 x i8> undef, <16 x i8> undef)
+; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 224 for instruction: %V32I8 = call { <32 x i8>, <32 x i1> } @llvm.umul.with.overflow.v32i8(<32 x i8> undef, <32 x i8> undef)
+; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 608 for instruction: %V64I8 = call { <64 x i8>, <64 x i1> } @llvm.umul.with.overflow.v64i8(<64 x i8> undef, <64 x i8> undef)
; MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret i32 undef
;
; V8M-SIZE-LABEL: 'umul'
@@ -922,13 +922,13 @@ define i32 @umul(i32 %arg) {
; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 151 for instruction: %V8I32 = call { <8 x i32>, <8 x i1> } @llvm.umul.with.overflow.v8i32(<8 x i32> undef, <8 x i32> undef)
; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 553 for instruction: %V16I32 = call { <16 x i32>, <16 x i1> } @llvm.umul.with.overflow.v16i32(<16 x i32> undef, <16 x i32> undef)
; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 5 for instruction: %I16 = call { i16, i1 } @llvm.umul.with.overflow.i16(i16 undef, i16 undef)
-; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 8 for instruction: %V8I16 = call { <8 x i16>, <8 x i1> } @llvm.umul.with.overflow.v8i16(<8 x i16> undef, <8 x i16> undef)
-; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %V16I16 = call { <16 x i16>, <16 x i1> } @llvm.umul.with.overflow.v16i16(<16 x i16> undef, <16 x i16> undef)
-; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 17 for instruction: %V32I16 = call { <32 x i16>, <32 x i1> } @llvm.umul.with.overflow.v32i16(<32 x i16> undef, <32 x i16> undef)
+; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 38 for instruction: %V8I16 = call { <8 x i16>, <8 x i1> } @llvm.umul.with.overflow.v8i16(<8 x i16> undef, <8 x i16> undef)
+; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 73 for instruction: %V16I16 = call { <16 x i16>, <16 x i1> } @llvm.umul.with.overflow.v16i16(<16 x i16> undef, <16 x i16> undef)
+; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 143 for instruction: %V32I16 = call { <32 x i16>, <32 x i1> } @llvm.umul.with.overflow.v32i16(<32 x i16> undef, <32 x i16> undef)
; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 5 for instruction: %I8 = call { i8, i1 } @llvm.umul.with.overflow.i8(i8 undef, i8 undef)
-; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 8 for instruction: %V16I8 = call { <16 x i8>, <16 x i1> } @llvm.umul.with.overflow.v16i8(<16 x i8> undef, <16 x i8> undef)
-; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 11 for instruction: %V32I8 = call { <32 x i8>, <32 x i1> } @llvm.umul.with.overflow.v32i8(<32 x i8> undef, <32 x i8> undef)
-; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 17 for instruction: %V64I8 = call { <64 x i8>, <64 x i1> } @llvm.umul.with.overflow.v64i8(<64 x i8> undef, <64 x i8> undef)
+; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 70 for instruction: %V16I8 = call { <16 x i8>, <16 x i1> } @llvm.umul.with.overflow.v16i8(<16 x i8> undef, <16 x i8> undef)
+; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 137 for instruction: %V32I8 = call { <32 x i8>, <32 x i1> } @llvm.umul.with.overflow.v32i8(<32 x i8> undef, <32 x i8> undef)
+; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 271 for instruction: %V64I8 = call { <64 x i8>, <64 x i1> } @llvm.umul.with.overflow.v64i8(<64 x i8> undef, <64 x i8> undef)
; MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: ret i32 undef
;
%I64 = call {i64, i1} @llvm.umul.with.overflow.i64(i64 undef, i64 undef)
diff --git a/llvm/test/Analysis/CostModel/ARM/cast.ll b/llvm/test/Analysis/CostModel/ARM/cast.ll
index 3dc55674a131..6741f92f6e8e 100644
--- a/llvm/test/Analysis/CostModel/ARM/cast.ll
+++ b/llvm/test/Analysis/CostModel/ARM/cast.ll
@@ -521,12 +521,12 @@ define i32 @casts() {
; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %tv4i32i8 = trunc <4 x i32> undef to <4 x i8>
; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %tv4i32i16 = trunc <4 x i32> undef to <4 x i16>
; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %tv4i16i8 = trunc <4 x i16> undef to <4 x i8>
-; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %tv8i32i8 = trunc <8 x i32> undef to <8 x i8>
-; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %tv8i32i16 = trunc <8 x i32> undef to <8 x i16>
+; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 16 for instruction: %tv8i32i8 = trunc <8 x i32> undef to <8 x i8>
+; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 16 for instruction: %tv8i32i16 = trunc <8 x i32> undef to <8 x i16>
; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %tv8i16i8 = trunc <8 x i16> undef to <8 x i8>
-; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 10 for instruction: %tv16i32i8 = trunc <16 x i32> undef to <16 x i8>
-; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 8 for instruction: %tv16i32i16 = trunc <16 x i32> undef to <16 x i16>
-; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %tv16i16i8 = trunc <16 x i16> undef to <16 x i8>
+; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 32 for instruction: %tv16i32i8 = trunc <16 x i32> undef to <16 x i8>
+; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 32 for instruction: %tv16i32i16 = trunc <16 x i32> undef to <16 x i16>
+; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 32 for instruction: %tv16i16i8 = trunc <16 x i16> undef to <16 x i8>
; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 10 for instruction: %r80df = fptrunc double undef to float
; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 20 for instruction: %r81df = fptrunc <2 x double> undef to <2 x float>
; CHECK-MVE-RECIP-NEXT: Cost Model: Found an estimated cost of 40 for instruction: %r82df = fptrunc <4 x double> undef to <4 x float>
@@ -2097,12 +2097,12 @@ define i32 @casts() {
; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %tv4i32i8 = trunc <4 x i32> undef to <4 x i8>
; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %tv4i32i16 = trunc <4 x i32> undef to <4 x i16>
; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %tv4i16i8 = trunc <4 x i16> undef to <4 x i8>
-; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %tv8i32i8 = trunc <8 x i32> undef to <8 x i8>
-; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %tv8i32i16 = trunc <8 x i32> undef to <8 x i16>
+; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 16 for instruction: %tv8i32i8 = trunc <8 x i32> undef to <8 x i8>
+; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 16 for instruction: %tv8i32i16 = trunc <8 x i32> undef to <8 x i16>
; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %tv8i16i8 = trunc <8 x i16> undef to <8 x i8>
-; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %tv16i32i8 = trunc <16 x i32> undef to <16 x i8>
-; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %tv16i32i16 = trunc <16 x i32> undef to <16 x i16>
-; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %tv16i16i8 = trunc <16 x i16> undef to <16 x i8>
+; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 32 for instruction: %tv16i32i8 = trunc <16 x i32> undef to <16 x i8>
+; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 32 for instruction: %tv16i32i16 = trunc <16 x i32> undef to <16 x i16>
+; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 32 for instruction: %tv16i16i8 = trunc <16 x i16> undef to <16 x i8>
; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 10 for instruction: %r80df = fptrunc double undef to float
; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 20 for instruction: %r81df = fptrunc <2 x double> undef to <2 x float>
; CHECK-MVE-SIZE-NEXT: Cost Model: Found an estimated cost of 40 for instruction: %r82df = fptrunc <4 x double> undef to <4 x float>
diff --git a/llvm/test/Analysis/CostModel/ARM/mve-gather-scatter-cost.ll b/llvm/test/Analysis/CostModel/ARM/mve-gather-scatter-cost.ll
index 1ec8ea00e371..fe75e5087ec4 100644
--- a/llvm/test/Analysis/CostModel/ARM/mve-gather-scatter-cost.ll
+++ b/llvm/test/Analysis/CostModel/ARM/mve-gather-scatter-cost.ll
@@ -358,11 +358,11 @@ define void @gep_v8i16(i16* %base, i8* %base8, i32* %base32, <8 x i32> %ind32, <
; CHECK-NEXT: Cost Model: Found an estimated cost of 136 for instruction: call void @llvm.masked.scatter.v8i16.v8p0i16(<8 x i16> %resbs, <8 x i16*> %gepbsb, i32 2, <8 x i1> %mask)
; CHECK-NEXT: Cost Model: Found an estimated cost of 10 for instruction: %indzext4 = zext <8 x i16> %ind16 to <8 x i32>
; CHECK-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %gep4 = getelementptr i16, i16* %base, <8 x i32> %indzext4
-; CHECK-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %indtrunc = trunc <8 x i32> %ind32 to <8 x i16>
+; CHECK-NEXT: Cost Model: Found an estimated cost of 16 for instruction: %indtrunc = trunc <8 x i32> %ind32 to <8 x i16>
; CHECK-NEXT: Cost Model: Found an estimated cost of 16 for instruction: call void @llvm.masked.scatter.v8i16.v8p0i16(<8 x i16> %indtrunc, <8 x i16*> %gep4, i32 2, <8 x i1> %mask)
; CHECK-NEXT: Cost Model: Found an estimated cost of 16 for instruction: %res = call <8 x i16> @llvm.masked.gather.v8i16.v8p0i16(<8 x i16*> %gep4, i32 2, <8 x i1> %mask, <8 x i16> undef)
; CHECK-NEXT: Cost Model: Found an estimated cost of 10 for instruction: %ressext = sext <8 x i16> %res to <8 x i32>
-; CHECK-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %restrunc = trunc <8 x i32> %ressext to <8 x i16>
+; CHECK-NEXT: Cost Model: Found an estimated cost of 16 for instruction: %restrunc = trunc <8 x i32> %ressext to <8 x i16>
; CHECK-NEXT: Cost Model: Found an estimated cost of 16 for instruction: call void @llvm.masked.scatter.v8i16.v8p0i16(<8 x i16> %restrunc, <8 x i16*> %gep4, i32 4, <8 x i1> %mask)
; CHECK-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret void
;
@@ -525,7 +525,7 @@ define void @gep_v16i8(i8* %base, i16* %base16, <16 x i8> %ind8, <16 x i32> %ind
; CHECK-NEXT: Cost Model: Found an estimated cost of 528 for instruction: call void @llvm.masked.scatter.v16i8.v16p0i8(<16 x i8> %resbs, <16 x i8*> %gepbsb, i32 2, <16 x i1> %mask)
; CHECK-NEXT: Cost Model: Found an estimated cost of 74 for instruction: %indzext4 = zext <16 x i8> %ind8 to <16 x i32>
; CHECK-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %gep4 = getelementptr i8, i8* %base, <16 x i32> %indzext
-; CHECK-NEXT: Cost Model: Found an estimated cost of 10 for instruction: %indtrunc = trunc <16 x i32> %ind32 to <16 x i8>
+; CHECK-NEXT: Cost Model: Found an estimated cost of 32 for instruction: %indtrunc = trunc <16 x i32> %ind32 to <16 x i8>
; CHECK-NEXT: Cost Model: Found an estimated cost of 32 for instruction: call void @llvm.masked.scatter.v16i8.v16p0i8(<16 x i8> %indtrunc, <16 x i8*> %gep4, i32 2, <16 x i1> %mask)
; CHECK-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret void
;
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