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llvm-project/llvm/test/CodeGen/Hexagon/autohvx
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Luke Lau 742fb8b5c7 [DAGCombine] Fold (store (insert_elt (load p)) x p) -> (store x) 
If we have a store of a load with no other uses in between it, it's
considered dead and is removed. So sometimes when legalizing a fixed
length vector store of an insert, we end up producing better code
through scalarization than without.
An example is the follow below:

  %a = load <4 x i64>, ptr %x
  %b = insertelement <4 x i64> %a, i64 %y, i32 2
  store <4 x i64> %b, ptr %x

If this is scalarized, then DAGCombine successfully removes 3 of the 4
stores which are considered dead, and on RISC-V we get:

  sd a1, 16(a0)

However if we make the vector type legal (-mattr=+v), then we lose the
optimisation because we don't scalarize it.

This patch attempts to recover the optimisation for vectors by
identifying patterns where we store a load with a single insert
inbetween, replacing it with a scalar store of the inserted element.

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D152276
2023-06-28 22:45:04 +01:00
..
abs.ll
[Hexagon] Add HVX patterns for ISD::ABS
2022-09-19 10:12:15 -07:00
align2-64b.ll
…
align2-128b.ll
…
align-64b.ll
…
align-128b.ll
…
arith-float.ll
[Hexagon] Generate HVX/FP arithmetic instructions
2021-12-30 12:47:30 -08:00
arith.ll
…
bitcount-64b.ll
[Hexagon] Switch vunpackub->op->vpackeb pattern to vzb/vshuffeb
2022-10-12 15:31:28 -07:00
bitcount-128b.ll
[Hexagon] Switch vunpackub->op->vpackeb pattern to vzb/vshuffeb
2022-10-12 15:31:28 -07:00
bitwise-pred-64b.ll
…
bitwise-pred-128b.ll
…
bswap.ll
…
build-vector-float-type.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
build-vector-i32-64b.ll
[Hexagon] Improve BUILD_VECTOR codegen
2021-12-29 10:18:21 -08:00
build-vector-i32-128b.ll
[Hexagon] Improve BUILD_VECTOR codegen
2021-12-29 10:18:21 -08:00
build-vector-i32-type.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
calling-conv.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
concat-vectors-64b.ll
…
concat-vectors-128b.ll
…
contract-64b.ll
…
contract-128b.ll
…
conv-fp-fp.ll
[Hexagon] Conversions to/from FP types, HVX and scalar
2022-01-04 11:03:51 -08:00
conv-fp-int-ieee.ll
[Hexagon] Conversions to/from FP types, HVX and scalar
2022-01-04 11:03:51 -08:00
ctpop-split.ll
…
deal-64b.ll
…
deal-128b.ll
…
delta2-64b.ll
…
delta-64b.ll
…
delta-128b.ll
…
extract-element.ll
…
float-cost.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
fp-to-int.ll
[Hexagon] Don't lower legal EXTRACT_SUBVECTOR to EXTRACT_SUBREG
2022-11-24 18:10:42 -08:00
fsplat.ll
[Hexagon] Handle floating point splats
2021-12-29 06:52:24 -08:00
funnel-128b.ll
[Hexagon] Use shifts by scalar for funnel shifts by scalar
2022-10-18 09:49:17 -07:00
hfinsert.ll
[DAGCombine] Fold (store (insert_elt (load p)) x p) -> (store x)
2023-06-28 22:45:04 +01:00
hfnosplat_cp.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
hfsplat.ll
[Hexagon] Handle floating point splats
2021-12-29 06:52:24 -08:00
hvx-idiom-empty-results.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
int-to-fp.ll
[Hexagon] Further improve code generation for shuffles
2022-11-29 14:19:29 -08:00
interleave.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-anyext-inreg.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-anyext-pair.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-bitcast-vsplat2.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-bitcast-vsplat.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-bool-vector.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-build-undef.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-build-vector.ll
Revert "[Hexagon] Don't build two halves of HVX vector in parallel"
2021-12-30 07:57:11 -08:00
isel-concat-multiple.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-concat-vectors-bool.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-concat-vectors.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-const-splat-bitcast.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-const-splat-imm.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-const-splat.ll
…
isel-const-vector.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-expand-unaligned-loads-noindexed.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-expand-unaligned-loads.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-extractelt-illegal-type.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-hvx-concat-truncate.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-hvx-pred-bitcast.ll
…
isel-insert-subvector-v4i8.ll
[Hexagon] Fix number of arguments in call to DAG.getNode for VINSERTW0
2023-02-16 09:57:58 -08:00
isel-intrinsics.ll
[Hexagon] Use HVX predicates when mapping HVX intrinsics in isel
2022-11-01 08:40:20 -07:00
isel-mstore-fp16.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-q2v-pair.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-q-legalization-loop.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-qfalse.ll
…
isel-select-const.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-select-q.ll
…
isel-setcc-pair-fp.ll
[Hexagon] Split SETCC on float16/float32 HVX pairs
2023-05-17 10:42:58 -07:00
isel-setcc-pair.ll
…
isel-setcc-v256i1.ll
…
isel-sext-inreg.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-shift-byte.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-shuff-single.ll
…
isel-shuffle-gather.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-shuffle-isdisel.ll
[Hexagon] Improve selection algorithm in HvxSelector::select
2023-02-21 12:56:33 -08:00
isel-shuffle-no-perfect-completion.ll
[Hexagon] Better detection of impossible completions to perfect shuffles
2022-12-05 12:40:08 -08:00
isel-shuffle-pack.ll
…
isel-split-masked.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-store-bitcast-v128i1.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-truncate-legal.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-truncate.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-undef-not-zero.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-vec-ext.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-vpackew.ll
[DAGCombine] Make sure combined nodes are added back to the worklist in topological order.
2023-06-13 09:14:37 +00:00
isel-vsplat-pair.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-widen-memop.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-widen-store.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-widen-truncate-illegal-elem.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-widen-truncate-op.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-widen-truncate-pair.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
isel-widen-truncate.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
logical-64b.ll
…
logical-128b.ll
…
lower-insert-elt.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
masked-vmem-basic.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
maximize-bandwidth.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
minmax-64b.ll
…
minmax-128b.ll
…
minmax-float.ll
[Hexagon] Generate HVX/FP compare instructions
2021-12-30 12:17:22 -08:00
mulh.ll
[DAGCombine] Make sure combined nodes are added back to the worklist in topological order.
2023-06-13 09:14:37 +00:00
non-simple-hvx-type.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
perfect-single.ll
…
pred-vmem-64b.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
pred-vmem-128b.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
qmul-add-over-32-bit.ll
[Hexagon] Handle rounding beyond low 32 bits
2022-12-14 10:25:34 -08:00
qmul-chop.ll
[Hexagon] Improve idioms for fixed-point vector multiplication
2022-11-12 08:46:27 -08:00
qmul.ll
[Hexagon] Further improve code generation for shuffles
2022-11-29 14:19:29 -08:00
reg-sequence.ll
…
shift-64b.ll
[Hexagon] Switch vunpackub->op->vpackeb pattern to vzb/vshuffeb
2022-10-12 15:31:28 -07:00
shift-128b.ll
[Hexagon] Switch vunpackub->op->vpackeb pattern to vzb/vshuffeb
2022-10-12 15:31:28 -07:00
shuff-64b.ll
…
shuff-128b.ll
…
shuff-combos-64b.ll
…
shuff-combos-128b.ll
…
shuff-perfect-inverted-pair.ll
…
shuff-single.ll
…
shuffle-expanding-64b.ll
…
shuffle-expanding-128b.ll
…
shuffle-half-64b.ll
[Hexagon] Further improve code generation for shuffles
2022-11-29 14:19:29 -08:00
shuffle-half-128b.ll
[Hexagon] Further improve code generation for shuffles
2022-11-29 14:19:29 -08:00
splat.ll
[Hexagon] Calling conventions for floating point vectors
2021-12-29 09:01:07 -08:00
vdd0.ll
…
vector-align-addr.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
vector-align-bad-move2.ll
[Hexagon] Fix safety check in moving instructions in HVC::AlignVectors
2023-05-23 07:45:12 -07:00
vector-align-bad-move3.ll
[Hexagon] Remap all instructions generated for aligned address/value in HVC
2023-05-24 06:06:25 -07:00
vector-align-bad-move.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
vector-align-base-type-mismatch.ll
[Hexagon] Use scalar evolution to calculate pointer difference in HVC
2023-05-27 09:11:09 -07:00
vector-align-basic.ll
[Hexagon] Improve safety of aligned loads/stores in HVC
2023-05-17 04:33:53 -07:00
vector-align-interleaved.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
vector-align-only-phi-use.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
vector-align-order.ll
[Hexagon] Ensure proper ordering of instructions in HVC::AlignVectors
2023-03-17 08:13:49 -07:00
vector-align-overapping-stores.ll
[Hexagon] Properly combine overlapping stores in HVC
2023-06-16 13:29:19 -07:00
vector-align-rescale-nonint.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
vector-align-scalar-mask.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
vector-align-store-mask.ll
[Hexagon] Improve safety of aligned loads/stores in HVC
2023-05-17 04:33:53 -07:00
vector-align-store.ll
[Hexagon] Add more debugging options and dumps to HVC
2023-05-24 06:06:25 -07:00
vector-align-tbaa.ll
[Hexagon] Add more debugging options and dumps to HVC
2023-05-24 06:06:25 -07:00
vector-align-terminator.ll
[Hexagon] Fix insertion point for pointer difference calculation
2022-10-19 14:23:39 -07:00
vector-align-use-in-different-block.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
vector-compare-64b.ll
…
vector-compare-128b.ll
…
vector-compare-float.ll
[Hexagon] Generate HVX/FP compare instructions
2021-12-30 12:17:22 -08:00
vector-load-store-basic.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
vector-predicate-typecast.ll
…
vext-64b.ll
…
vext-128b.ll
…
vmpy-parts.ll
[Hexagon] Improve handling of 32-bit mulh/mul_lohi on HVX
2022-10-22 15:08:27 -07:00
vmux-order.ll
…
widen-ext.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
widen-setcc.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00
widen-trunc.ll
[Hexagon] Convert some tests to opaque pointers (NFC)
2022-12-19 12:53:32 +01:00