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merged 4 commits into from
Dec 19, 2024
Merged

[AArch64] Tweak truncate costs for some scalable vector types #119542

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8ed0278
Add tests
david-arm Dec 11, 2024
5be6551
[AArch64] Tweak truncate costs for some scalable vector types
david-arm Dec 18, 2024
58212a1
Fix formatting
david-arm Dec 18, 2024
018c144
Merge branch 'main' into trunc_costs
david-arm Dec 19, 2024
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49 changes: 33 additions & 16 deletions llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
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Expand Up @@ -2782,22 +2782,39 @@ InstructionCost AArch64TTIImpl::getCastInstrCost(unsigned Opcode, Type *Dst,
{ISD::TRUNCATE, MVT::v16i32, MVT::v16i64, 4}, // 4 x uzp1

// Truncations on nxvmiN
{ISD::TRUNCATE, MVT::nxv2i1, MVT::nxv2i16, 1},
{ISD::TRUNCATE, MVT::nxv2i1, MVT::nxv2i32, 1},
{ISD::TRUNCATE, MVT::nxv2i1, MVT::nxv2i64, 1},
{ISD::TRUNCATE, MVT::nxv4i1, MVT::nxv4i16, 1},
{ISD::TRUNCATE, MVT::nxv4i1, MVT::nxv4i32, 1},
{ISD::TRUNCATE, MVT::nxv4i1, MVT::nxv4i64, 2},
{ISD::TRUNCATE, MVT::nxv8i1, MVT::nxv8i16, 1},
{ISD::TRUNCATE, MVT::nxv8i1, MVT::nxv8i32, 3},
{ISD::TRUNCATE, MVT::nxv8i1, MVT::nxv8i64, 5},
{ISD::TRUNCATE, MVT::nxv16i1, MVT::nxv16i8, 1},
{ISD::TRUNCATE, MVT::nxv2i16, MVT::nxv2i32, 1},
{ISD::TRUNCATE, MVT::nxv2i32, MVT::nxv2i64, 1},
{ISD::TRUNCATE, MVT::nxv4i16, MVT::nxv4i32, 1},
{ISD::TRUNCATE, MVT::nxv4i32, MVT::nxv4i64, 2},
{ISD::TRUNCATE, MVT::nxv8i16, MVT::nxv8i32, 3},
{ISD::TRUNCATE, MVT::nxv8i32, MVT::nxv8i64, 6},
{ISD::TRUNCATE, MVT::nxv2i1, MVT::nxv2i8, 2},
{ISD::TRUNCATE, MVT::nxv2i1, MVT::nxv2i16, 2},
{ISD::TRUNCATE, MVT::nxv2i1, MVT::nxv2i32, 2},
{ISD::TRUNCATE, MVT::nxv2i1, MVT::nxv2i64, 2},
{ISD::TRUNCATE, MVT::nxv4i1, MVT::nxv4i8, 2},
{ISD::TRUNCATE, MVT::nxv4i1, MVT::nxv4i16, 2},
{ISD::TRUNCATE, MVT::nxv4i1, MVT::nxv4i32, 2},
{ISD::TRUNCATE, MVT::nxv4i1, MVT::nxv4i64, 5},
{ISD::TRUNCATE, MVT::nxv8i1, MVT::nxv8i8, 2},
{ISD::TRUNCATE, MVT::nxv8i1, MVT::nxv8i16, 2},
{ISD::TRUNCATE, MVT::nxv8i1, MVT::nxv8i32, 5},
{ISD::TRUNCATE, MVT::nxv8i1, MVT::nxv8i64, 11},
{ISD::TRUNCATE, MVT::nxv16i1, MVT::nxv16i8, 2},
{ISD::TRUNCATE, MVT::nxv2i8, MVT::nxv2i16, 0},
{ISD::TRUNCATE, MVT::nxv2i8, MVT::nxv2i32, 0},
{ISD::TRUNCATE, MVT::nxv2i8, MVT::nxv2i64, 0},
{ISD::TRUNCATE, MVT::nxv2i16, MVT::nxv2i32, 0},
{ISD::TRUNCATE, MVT::nxv2i16, MVT::nxv2i64, 0},
{ISD::TRUNCATE, MVT::nxv2i32, MVT::nxv2i64, 0},
{ISD::TRUNCATE, MVT::nxv4i8, MVT::nxv4i16, 0},
{ISD::TRUNCATE, MVT::nxv4i8, MVT::nxv4i32, 0},
{ISD::TRUNCATE, MVT::nxv4i8, MVT::nxv4i64, 1},
{ISD::TRUNCATE, MVT::nxv4i16, MVT::nxv4i32, 0},
{ISD::TRUNCATE, MVT::nxv4i16, MVT::nxv4i64, 1},
{ISD::TRUNCATE, MVT::nxv4i32, MVT::nxv4i64, 1},
{ISD::TRUNCATE, MVT::nxv8i8, MVT::nxv8i16, 0},
{ISD::TRUNCATE, MVT::nxv8i8, MVT::nxv8i32, 1},
{ISD::TRUNCATE, MVT::nxv8i8, MVT::nxv8i64, 3},
{ISD::TRUNCATE, MVT::nxv8i16, MVT::nxv8i32, 1},
{ISD::TRUNCATE, MVT::nxv8i16, MVT::nxv8i64, 3},
{ISD::TRUNCATE, MVT::nxv16i8, MVT::nxv16i16, 1},
{ISD::TRUNCATE, MVT::nxv16i8, MVT::nxv16i32, 3},
{ISD::TRUNCATE, MVT::nxv16i8, MVT::nxv16i64, 7},

// The number of shll instructions for the extension.
{ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i16, 3},
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36 changes: 18 additions & 18 deletions llvm/test/Analysis/CostModel/AArch64/sve-cast.ll
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Expand Up @@ -418,27 +418,27 @@ define void @trunc() {
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s2i8i16 = trunc <2 x i16> undef to <2 x i8>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s2i8i32 = trunc <2 x i32> undef to <2 x i8>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s2i8i64 = trunc <2 x i64> undef to <2 x i8>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %s2i16i32 = trunc <2 x i32> undef to <2 x i16>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s2i16i32 = trunc <2 x i32> undef to <2 x i16>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s2i16i64 = trunc <2 x i64> undef to <2 x i16>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %s2i32i64 = trunc <2 x i64> undef to <2 x i32>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s2i32i64 = trunc <2 x i64> undef to <2 x i32>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s4i8i16 = trunc <4 x i16> undef to <4 x i8>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s4i8i32 = trunc <4 x i32> undef to <4 x i8>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s4i8i64 = trunc <4 x i64> undef to <4 x i8>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %s4i16i32 = trunc <4 x i32> undef to <4 x i16>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s4i16i32 = trunc <4 x i32> undef to <4 x i16>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s4i16i64 = trunc <4 x i64> undef to <4 x i16>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %s4i32i64 = trunc <4 x i64> undef to <4 x i32>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s4i32i64 = trunc <4 x i64> undef to <4 x i32>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s8i8i16 = trunc <8 x i16> undef to <8 x i8>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s8i8i32 = trunc <8 x i32> undef to <8 x i8>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s8i8i64 = trunc <8 x i64> undef to <8 x i8>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %s8i16i32 = trunc <8 x i32> undef to <8 x i16>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s8i16i32 = trunc <8 x i32> undef to <8 x i16>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s8i16i64 = trunc <8 x i64> undef to <8 x i16>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %s8i32i64 = trunc <8 x i64> undef to <8 x i32>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s8i32i64 = trunc <8 x i64> undef to <8 x i32>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i8i16 = trunc <16 x i16> undef to <16 x i8>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i8i32 = trunc <16 x i32> undef to <16 x i8>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i8i64 = trunc <16 x i64> undef to <16 x i8>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %s16i16i32 = trunc <16 x i32> undef to <16 x i16>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i16i32 = trunc <16 x i32> undef to <16 x i16>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i16i64 = trunc <16 x i64> undef to <16 x i16>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 8 for instruction: %s16i32i64 = trunc <16 x i64> undef to <16 x i32>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i32i64 = trunc <16 x i64> undef to <16 x i32>
; SVE128-NO-NEON-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret void
;
; FIXED-MIN-256-LABEL: 'trunc'
Expand All @@ -463,19 +463,19 @@ define void @trunc() {
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s4i8i64 = trunc <4 x i64> undef to <4 x i8>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %s4i16i32 = trunc <4 x i32> undef to <4 x i16>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s4i16i64 = trunc <4 x i64> undef to <4 x i16>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %s4i32i64 = trunc <4 x i64> undef to <4 x i32>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s4i32i64 = trunc <4 x i64> undef to <4 x i32>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %s8i8i16 = trunc <8 x i16> undef to <8 x i8>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s8i8i32 = trunc <8 x i32> undef to <8 x i8>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s8i8i64 = trunc <8 x i64> undef to <8 x i8>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %s8i16i32 = trunc <8 x i32> undef to <8 x i16>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s8i16i32 = trunc <8 x i32> undef to <8 x i16>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s8i16i64 = trunc <8 x i64> undef to <8 x i16>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %s8i32i64 = trunc <8 x i64> undef to <8 x i32>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s8i32i64 = trunc <8 x i64> undef to <8 x i32>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i8i16 = trunc <16 x i16> undef to <16 x i8>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i8i32 = trunc <16 x i32> undef to <16 x i8>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i8i64 = trunc <16 x i64> undef to <16 x i8>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %s16i16i32 = trunc <16 x i32> undef to <16 x i16>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i16i32 = trunc <16 x i32> undef to <16 x i16>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i16i64 = trunc <16 x i64> undef to <16 x i16>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %s16i32i64 = trunc <16 x i64> undef to <16 x i32>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i32i64 = trunc <16 x i64> undef to <16 x i32>
; FIXED-MIN-256-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret void
;
; FIXED-MIN-2048-LABEL: 'trunc'
Expand All @@ -500,19 +500,19 @@ define void @trunc() {
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s4i8i64 = trunc <4 x i64> undef to <4 x i8>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %s4i16i32 = trunc <4 x i32> undef to <4 x i16>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s4i16i64 = trunc <4 x i64> undef to <4 x i16>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %s4i32i64 = trunc <4 x i64> undef to <4 x i32>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s4i32i64 = trunc <4 x i64> undef to <4 x i32>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %s8i8i16 = trunc <8 x i16> undef to <8 x i8>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s8i8i32 = trunc <8 x i32> undef to <8 x i8>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s8i8i64 = trunc <8 x i64> undef to <8 x i8>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %s8i16i32 = trunc <8 x i32> undef to <8 x i16>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s8i16i32 = trunc <8 x i32> undef to <8 x i16>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s8i16i64 = trunc <8 x i64> undef to <8 x i16>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %s8i32i64 = trunc <8 x i64> undef to <8 x i32>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s8i32i64 = trunc <8 x i64> undef to <8 x i32>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i8i16 = trunc <16 x i16> undef to <16 x i8>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i8i32 = trunc <16 x i32> undef to <16 x i8>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i8i64 = trunc <16 x i64> undef to <16 x i8>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %s16i16i32 = trunc <16 x i32> undef to <16 x i16>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i16i32 = trunc <16 x i32> undef to <16 x i16>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i16i64 = trunc <16 x i64> undef to <16 x i16>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %s16i32i64 = trunc <16 x i64> undef to <16 x i32>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %s16i32i64 = trunc <16 x i64> undef to <16 x i32>
; FIXED-MIN-2048-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret void
;
%r8 = trunc i8 undef to i1
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