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[ARM] MVE sext costs 

This adds some sext costs for MVE, taken from the length of assembly sequences
that we currently generate.

Differential Revision: https://reviews.llvm.org/D66010

llvm-svn: 369244
This commit is contained in:
David Green 2019-08-19 09:13:22 +00:00
parent b58ba8aae7
commit 2bfc13fde1
2 changed files with 77 additions and 16 deletions
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25
llvm/lib/Target/ARM/ARMTargetTransformInfo.cpp
View File

@ -349,6 +349,31 @@ int ARMTTIImpl::getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src,
return Entry->Cost;
}
// MVE extend costs, taken from codegen tests. i8->i16 or i16->i32 is one
// instruction, i8->i32 is two. i64 zexts are an VAND with a constant, sext
// are linearised so take more.
static const TypeConversionCostTblEntry MVEVectorConversionTbl[] = {
{ ISD::SIGN_EXTEND, MVT::v8i16, MVT::v8i8, 1 },
{ ISD::ZERO_EXTEND, MVT::v8i16, MVT::v8i8, 1 },
{ ISD::SIGN_EXTEND, MVT::v4i32, MVT::v4i8, 2 },
{ ISD::ZERO_EXTEND, MVT::v4i32, MVT::v4i8, 2 },
{ ISD::SIGN_EXTEND, MVT::v2i64, MVT::v2i8, 10 },
{ ISD::ZERO_EXTEND, MVT::v2i64, MVT::v2i8, 2 },
{ ISD::SIGN_EXTEND, MVT::v4i32, MVT::v4i16, 1 },
{ ISD::ZERO_EXTEND, MVT::v4i32, MVT::v4i16, 1 },
{ ISD::SIGN_EXTEND, MVT::v2i64, MVT::v2i16, 10 },
{ ISD::ZERO_EXTEND, MVT::v2i64, MVT::v2i16, 2 },
{ ISD::SIGN_EXTEND, MVT::v2i64, MVT::v2i32, 8 },
{ ISD::ZERO_EXTEND, MVT::v2i64, MVT::v2i32, 2 },
};
if (SrcTy.isVector() && ST->hasMVEIntegerOps()) {
if (const auto *Entry = ConvertCostTableLookup(MVEVectorConversionTbl,
ISD, DstTy.getSimpleVT(),
SrcTy.getSimpleVT()))
return Entry->Cost * ST->getMVEVectorCostFactor();
}
// Scalar integer conversion costs.
static const TypeConversionCostTblEntry ARMIntegerConversionTbl[] = {
// i16 -> i64 requires two dependent operations.

68
llvm/test/Analysis/CostModel/ARM/cast.ll
View File

@ -74,8 +74,14 @@ define i32 @casts() {
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 10 for instruction: %r67 = uitofp i64 undef to float
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 10 for instruction: %r68 = sitofp i64 undef to double
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 10 for instruction: %r69 = uitofp i64 undef to double
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %q70 = sext <4 x i8> undef to <4 x i32>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %q71 = sext <8 x i8> undef to <8 x i16>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %s70 = sext <4 x i8> undef to <4 x i32>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %r70 = sext <8 x i8> undef to <8 x i32>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 6 for instruction: %r71 = sext <16 x i8> undef to <16 x i32>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %q72 = zext <4 x i8> undef to <4 x i32>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %q73 = zext <8 x i8> undef to <8 x i16>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %s72 = zext <4 x i8> undef to <4 x i32>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %r72 = zext <8 x i8> undef to <8 x i32>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 6 for instruction: %r73 = zext <16 x i8> undef to <16 x i32>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 7 for instruction: %rext_0 = sext <8 x i8> undef to <8 x i64>
@ -84,6 +90,12 @@ define i32 @casts() {
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 6 for instruction: %rext_3 = zext <8 x i16> undef to <8 x i64>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %rext_4 = sext <4 x i16> undef to <4 x i64>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %rext_5 = zext <4 x i16> undef to <4 x i64>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rext_6 = sext <2 x i8> undef to <2 x i64>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rext_7 = zext <2 x i8> undef to <2 x i64>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rext_8 = sext <2 x i16> undef to <2 x i64>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rext_9 = zext <2 x i16> undef to <2 x i64>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rext_a = sext <2 x i32> undef to <2 x i64>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %rext_b = zext <2 x i32> undef to <2 x i64>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %r74 = trunc <8 x i32> undef to <8 x i8>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 6 for instruction: %r75 = trunc <16 x i32> undef to <16 x i8>
; CHECK-NEON-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %r80 = fptrunc double undef to float
@ -329,16 +341,28 @@ define i32 @casts() {
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %r67 = uitofp i64 undef to float
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %r68 = sitofp i64 undef to double
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %r69 = uitofp i64 undef to double
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 10 for instruction: %r70 = sext <8 x i8> undef to <8 x i32>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 42 for instruction: %r71 = sext <16 x i8> undef to <16 x i32>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 10 for instruction: %r72 = zext <8 x i8> undef to <8 x i32>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 42 for instruction: %r73 = zext <16 x i8> undef to <16 x i32>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 74 for instruction: %rext_0 = sext <8 x i8> undef to <8 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 42 for instruction: %rext_1 = zext <8 x i8> undef to <8 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 74 for instruction: %rext_2 = sext <8 x i16> undef to <8 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 42 for instruction: %rext_3 = zext <8 x i16> undef to <8 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 18 for instruction: %rext_4 = sext <4 x i16> undef to <4 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 10 for instruction: %rext_5 = zext <4 x i16> undef to <4 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %q70 = sext <4 x i8> undef to <4 x i32>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %q71 = sext <8 x i8> undef to <8 x i16>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %s70 = sext <4 x i8> undef to <4 x i32>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 18 for instruction: %r70 = sext <8 x i8> undef to <8 x i32>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 74 for instruction: %r71 = sext <16 x i8> undef to <16 x i32>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %q72 = zext <4 x i8> undef to <4 x i32>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %q73 = zext <8 x i8> undef to <8 x i16>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %s72 = zext <4 x i8> undef to <4 x i32>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 18 for instruction: %r72 = zext <8 x i8> undef to <8 x i32>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 74 for instruction: %r73 = zext <16 x i8> undef to <16 x i32>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 330 for instruction: %rext_0 = sext <8 x i8> undef to <8 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 74 for instruction: %rext_1 = zext <8 x i8> undef to <8 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 330 for instruction: %rext_2 = sext <8 x i16> undef to <8 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 74 for instruction: %rext_3 = zext <8 x i16> undef to <8 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 82 for instruction: %rext_4 = sext <4 x i16> undef to <4 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 18 for instruction: %rext_5 = zext <4 x i16> undef to <4 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 20 for instruction: %rext_6 = sext <2 x i8> undef to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %rext_7 = zext <2 x i8> undef to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 20 for instruction: %rext_8 = sext <2 x i16> undef to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %rext_9 = zext <2 x i16> undef to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 16 for instruction: %rext_a = sext <2 x i32> undef to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %rext_b = zext <2 x i32> undef to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %r74 = trunc <8 x i32> undef to <8 x i8>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 10 for instruction: %r75 = trunc <16 x i32> undef to <16 x i8>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %r80 = fptrunc double undef to float
@ -591,8 +615,14 @@ define i32 @casts() {
%r68 = sitofp i64 undef to double
%r69 = uitofp i64 undef to double
%q70 = sext <4 x i8> undef to <4 x i32>
%q71 = sext <8 x i8> undef to <8 x i16>
%s70 = sext <4 x i8> undef to <4 x i32>
%r70 = sext <8 x i8> undef to <8 x i32>
%r71 = sext <16 x i8> undef to <16 x i32>
%q72 = zext <4 x i8> undef to <4 x i32>
%q73 = zext <8 x i8> undef to <8 x i16>
%s72 = zext <4 x i8> undef to <4 x i32>
%r72 = zext <8 x i8> undef to <8 x i32>
%r73 = zext <16 x i8> undef to <16 x i32>
@ -602,6 +632,12 @@ define i32 @casts() {
%rext_3 = zext <8 x i16> undef to <8 x i64>
%rext_4 = sext <4 x i16> undef to <4 x i64>
%rext_5 = zext <4 x i16> undef to <4 x i64>
%rext_6 = sext <2 x i8> undef to <2 x i64>
%rext_7 = zext <2 x i8> undef to <2 x i64>
%rext_8 = sext <2 x i16> undef to <2 x i64>
%rext_9 = zext <2 x i16> undef to <2 x i64>
%rext_a = sext <2 x i32> undef to <2 x i64>
%rext_b = zext <2 x i32> undef to <2 x i64>
; Vector cast cost of instructions lowering the cast to the stack.
%r74 = trunc <8 x i32> undef to <8 x i8>
@ -866,14 +902,14 @@ define i32 @load_extends() {
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %v1 = zext <8 x i8> %loadv8i8 to <8 x i16>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %v2 = sext <4 x i8> %loadv4i8 to <4 x i32>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %v3 = zext <4 x i8> %loadv4i8 to <4 x i32>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %v4 = sext <2 x i8> %loadv2i8 to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %v5 = zext <2 x i8> %loadv2i8 to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 20 for instruction: %v4 = sext <2 x i8> %loadv2i8 to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %v5 = zext <2 x i8> %loadv2i8 to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %v6 = sext <4 x i16> %loadv4i16 to <4 x i32>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %v7 = zext <4 x i16> %loadv4i16 to <4 x i32>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %v8 = sext <2 x i16> %loadv2i16 to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %v9 = zext <2 x i16> %loadv2i16 to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %v10 = sext <2 x i32> %loadv2i32 to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %v11 = zext <2 x i32> %loadv2i32 to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 20 for instruction: %v8 = sext <2 x i16> %loadv2i16 to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %v9 = zext <2 x i16> %loadv2i16 to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 16 for instruction: %v10 = sext <2 x i32> %loadv2i32 to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %v11 = zext <2 x i32> %loadv2i32 to <2 x i64>
; CHECK-MVE-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret i32 undef
;