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[AArch64] Reduce vector insert/extract cost for Falkor.

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Differential Revision: https://reviews.llvm.org/D28403

llvm-svn: 291254
This commit is contained in:
Chad Rosier 2017-01-06 18:03:26 +00:00
parent 515317d6ae
commit 2e3e81f00b
2 changed files with 27 additions and 0 deletions
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1
lib/Target/AArch64/AArch64Subtarget.cpp
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@ -71,6 +71,7 @@ void AArch64Subtarget::initializeProperties() {
break;
case Falkor:
MaxInterleaveFactor = 4;
VectorInsertExtractBaseCost = 2;
break;
case Kryo:
MaxInterleaveFactor = 4;

26
test/Analysis/CostModel/AArch64/falkor.ll Normal file
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@ -0,0 +1,26 @@
; RUN: opt < %s -cost-model -analyze -mcpu=falkor | FileCheck %s
target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
target triple = "aarch64--linux-gnu"
; CHECK-LABEL: vectorInstrCost
define void @vectorInstrCost() {
; Vector extracts - extracting the first element should have a zero cost;
; all other elements should have a cost of two.
;
; CHECK: cost of 0 {{.*}} extractelement <2 x i64> undef, i32 0
; CHECK: cost of 2 {{.*}} extractelement <2 x i64> undef, i32 1
%t1 = extractelement <2 x i64> undef, i32 0
%t2 = extractelement <2 x i64> undef, i32 1
; Vector inserts - inserting the first element should have a zero cost; all
; other elements should have a cost of two.
;
; CHECK: cost of 0 {{.*}} insertelement <2 x i64> undef, i64 undef, i32 0
; CHECK: cost of 2 {{.*}} insertelement <2 x i64> undef, i64 undef, i32 1
%t3 = insertelement <2 x i64> undef, i64 undef, i32 0
%t4 = insertelement <2 x i64> undef, i64 undef, i32 1
ret void
}