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[ARM] Teach the cost model that cross-class copies are costly.

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Cross-class copies being expensive is actually a trait of the microarchitecture, but as I haven't yet seen an example of a microarchitecture where they're cheap it seems best to just enable this by default, covering the non-mcpu build case.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217674 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
James Molloy 2014-09-12 13:29:40 +00:00
parent 66feb63c3c
commit 94c25519a2
2 changed files with 63 additions and 56 deletions
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7
lib/Target/ARM/ARMTargetTransformInfo.cpp
View File

@ -390,6 +390,13 @@ unsigned ARMTTI::getVectorInstrCost(unsigned Opcode, Type *ValTy,
ValTy->getScalarSizeInBits() <= 32)
return 3;
// Cross-class copies are expensive on many microarchitectures,
// so assume they are expensive by default.
if ((Opcode == Instruction::InsertElement ||
Opcode == Instruction::ExtractElement) &&
ValTy->getVectorElementType()->isIntegerTy())
return 3;
return TargetTransformInfo::getVectorInstrCost(Opcode, ValTy, Index);
}

112
test/Analysis/CostModel/ARM/cast.ll
View File

@ -221,35 +221,35 @@ define i32 @casts() {
%r96 = fptoui <2 x float> undef to <2 x i32>
; CHECK: cost of 1 {{.*}} fptosi
%r97 = fptosi <2 x float> undef to <2 x i32>
; CHECK: cost of 28 {{.*}} fptoui
; CHECK: cost of 32 {{.*}} fptoui
%r98 = fptoui <2 x float> undef to <2 x i64>
; CHECK: cost of 28 {{.*}} fptosi
; CHECK: cost of 32 {{.*}} fptosi
%r99 = fptosi <2 x float> undef to <2 x i64>
; CHECK: cost of 8 {{.*}} fptoui
; CHECK: cost of 16 {{.*}} fptoui
%r100 = fptoui <2 x double> undef to <2 x i1>
; CHECK: cost of 8 {{.*}} fptosi
; CHECK: cost of 16 {{.*}} fptosi
%r101 = fptosi <2 x double> undef to <2 x i1>
; CHECK: cost of 8 {{.*}} fptoui
; CHECK: cost of 16 {{.*}} fptoui
%r102 = fptoui <2 x double> undef to <2 x i8>
; CHECK: cost of 8 {{.*}} fptosi
; CHECK: cost of 16 {{.*}} fptosi
%r103 = fptosi <2 x double> undef to <2 x i8>
; CHECK: cost of 8 {{.*}} fptoui
; CHECK: cost of 16 {{.*}} fptoui
%r104 = fptoui <2 x double> undef to <2 x i16>
; CHECK: cost of 8 {{.*}} fptosi
; CHECK: cost of 16 {{.*}} fptosi
%r105 = fptosi <2 x double> undef to <2 x i16>
; CHECK: cost of 2 {{.*}} fptoui
%r106 = fptoui <2 x double> undef to <2 x i32>
; CHECK: cost of 2 {{.*}} fptosi
%r107 = fptosi <2 x double> undef to <2 x i32>
; CHECK: cost of 28 {{.*}} fptoui
; CHECK: cost of 32 {{.*}} fptoui
%r108 = fptoui <2 x double> undef to <2 x i64>
; CHECK: cost of 28 {{.*}} fptosi
; CHECK: cost of 32 {{.*}} fptosi
%r109 = fptosi <2 x double> undef to <2 x i64>
; CHECK: cost of 16 {{.*}} fptoui
; CHECK: cost of 32 {{.*}} fptoui
%r110 = fptoui <4 x float> undef to <4 x i1>
; CHECK: cost of 16 {{.*}} fptosi
; CHECK: cost of 32 {{.*}} fptosi
%r111 = fptosi <4 x float> undef to <4 x i1>
; CHECK: cost of 3 {{.*}} fptoui
%r112 = fptoui <4 x float> undef to <4 x i8>
@ -263,39 +263,39 @@ define i32 @casts() {
%r116 = fptoui <4 x float> undef to <4 x i32>
; CHECK: cost of 1 {{.*}} fptosi
%r117 = fptosi <4 x float> undef to <4 x i32>
; CHECK: cost of 56 {{.*}} fptoui
; CHECK: cost of 64 {{.*}} fptoui
%r118 = fptoui <4 x float> undef to <4 x i64>
; CHECK: cost of 56 {{.*}} fptosi
; CHECK: cost of 64 {{.*}} fptosi
%r119 = fptosi <4 x float> undef to <4 x i64>
; CHECK: cost of 16 {{.*}} fptoui
; CHECK: cost of 32 {{.*}} fptoui
%r120 = fptoui <4 x double> undef to <4 x i1>
; CHECK: cost of 16 {{.*}} fptosi
; CHECK: cost of 32 {{.*}} fptosi
%r121 = fptosi <4 x double> undef to <4 x i1>
; CHECK: cost of 16 {{.*}} fptoui
; CHECK: cost of 32 {{.*}} fptoui
%r122 = fptoui <4 x double> undef to <4 x i8>
; CHECK: cost of 16 {{.*}} fptosi
; CHECK: cost of 32 {{.*}} fptosi
%r123 = fptosi <4 x double> undef to <4 x i8>
; CHECK: cost of 16 {{.*}} fptoui
; CHECK: cost of 32 {{.*}} fptoui
%r124 = fptoui <4 x double> undef to <4 x i16>
; CHECK: cost of 16 {{.*}} fptosi
; CHECK: cost of 32 {{.*}} fptosi
%r125 = fptosi <4 x double> undef to <4 x i16>
; CHECK: cost of 16 {{.*}} fptoui
; CHECK: cost of 32 {{.*}} fptoui
%r126 = fptoui <4 x double> undef to <4 x i32>
; CHECK: cost of 16 {{.*}} fptosi
; CHECK: cost of 32 {{.*}} fptosi
%r127 = fptosi <4 x double> undef to <4 x i32>
; CHECK: cost of 56 {{.*}} fptoui
; CHECK: cost of 64 {{.*}} fptoui
%r128 = fptoui <4 x double> undef to <4 x i64>
; CHECK: cost of 56 {{.*}} fptosi
; CHECK: cost of 64 {{.*}} fptosi
%r129 = fptosi <4 x double> undef to <4 x i64>
; CHECK: cost of 32 {{.*}} fptoui
; CHECK: cost of 64 {{.*}} fptoui
%r130 = fptoui <8 x float> undef to <8 x i1>
; CHECK: cost of 32 {{.*}} fptosi
; CHECK: cost of 64 {{.*}} fptosi
%r131 = fptosi <8 x float> undef to <8 x i1>
; CHECK: cost of 32 {{.*}} fptoui
; CHECK: cost of 64 {{.*}} fptoui
%r132 = fptoui <8 x float> undef to <8 x i8>
; CHECK: cost of 32 {{.*}} fptosi
; CHECK: cost of 64 {{.*}} fptosi
%r133 = fptosi <8 x float> undef to <8 x i8>
; CHECK: cost of 4 {{.*}} fptoui
%r134 = fptoui <8 x float> undef to <8 x i16>
@ -305,39 +305,39 @@ define i32 @casts() {
%r136 = fptoui <8 x float> undef to <8 x i32>
; CHECK: cost of 2 {{.*}} fptosi
%r137 = fptosi <8 x float> undef to <8 x i32>
; CHECK: cost of 112 {{.*}} fptoui
; CHECK: cost of 128 {{.*}} fptoui
%r138 = fptoui <8 x float> undef to <8 x i64>
; CHECK: cost of 112 {{.*}} fptosi
; CHECK: cost of 128 {{.*}} fptosi
%r139 = fptosi <8 x float> undef to <8 x i64>
; CHECK: cost of 32 {{.*}} fptoui
; CHECK: cost of 64 {{.*}} fptoui
%r140 = fptoui <8 x double> undef to <8 x i1>
; CHECK: cost of 32 {{.*}} fptosi
; CHECK: cost of 64 {{.*}} fptosi
%r141 = fptosi <8 x double> undef to <8 x i1>
; CHECK: cost of 32 {{.*}} fptoui
; CHECK: cost of 64 {{.*}} fptoui
%r142 = fptoui <8 x double> undef to <8 x i8>
; CHECK: cost of 32 {{.*}} fptosi
; CHECK: cost of 64 {{.*}} fptosi
%r143 = fptosi <8 x double> undef to <8 x i8>
; CHECK: cost of 32 {{.*}} fptoui
; CHECK: cost of 64 {{.*}} fptoui
%r144 = fptoui <8 x double> undef to <8 x i16>
; CHECK: cost of 32 {{.*}} fptosi
; CHECK: cost of 64 {{.*}} fptosi
%r145 = fptosi <8 x double> undef to <8 x i16>
; CHECK: cost of 32 {{.*}} fptoui
; CHECK: cost of 64 {{.*}} fptoui
%r146 = fptoui <8 x double> undef to <8 x i32>
; CHECK: cost of 32 {{.*}} fptosi
; CHECK: cost of 64 {{.*}} fptosi
%r147 = fptosi <8 x double> undef to <8 x i32>
; CHECK: cost of 112 {{.*}} fptoui
; CHECK: cost of 128 {{.*}} fptoui
%r148 = fptoui <8 x double> undef to <8 x i64>
; CHECK: cost of 112 {{.*}} fptosi
; CHECK: cost of 128 {{.*}} fptosi
%r149 = fptosi <8 x double> undef to <8 x i64>
; CHECK: cost of 64 {{.*}} fptoui
; CHECK: cost of 128 {{.*}} fptoui
%r150 = fptoui <16 x float> undef to <16 x i1>
; CHECK: cost of 64 {{.*}} fptosi
; CHECK: cost of 128 {{.*}} fptosi
%r151 = fptosi <16 x float> undef to <16 x i1>
; CHECK: cost of 64 {{.*}} fptoui
; CHECK: cost of 128 {{.*}} fptoui
%r152 = fptoui <16 x float> undef to <16 x i8>
; CHECK: cost of 64 {{.*}} fptosi
; CHECK: cost of 128 {{.*}} fptosi
%r153 = fptosi <16 x float> undef to <16 x i8>
; CHECK: cost of 8 {{.*}} fptoui
%r154 = fptoui <16 x float> undef to <16 x i16>
@ -347,30 +347,30 @@ define i32 @casts() {
%r156 = fptoui <16 x float> undef to <16 x i32>
; CHECK: cost of 4 {{.*}} fptosi
%r157 = fptosi <16 x float> undef to <16 x i32>
; CHECK: cost of 224 {{.*}} fptoui
; CHECK: cost of 256 {{.*}} fptoui
%r158 = fptoui <16 x float> undef to <16 x i64>
; CHECK: cost of 224 {{.*}} fptosi
; CHECK: cost of 256 {{.*}} fptosi
%r159 = fptosi <16 x float> undef to <16 x i64>
; CHECK: cost of 64 {{.*}} fptoui
; CHECK: cost of 128 {{.*}} fptoui
%r160 = fptoui <16 x double> undef to <16 x i1>
; CHECK: cost of 64 {{.*}} fptosi
; CHECK: cost of 128 {{.*}} fptosi
%r161 = fptosi <16 x double> undef to <16 x i1>
; CHECK: cost of 64 {{.*}} fptoui
; CHECK: cost of 128 {{.*}} fptoui
%r162 = fptoui <16 x double> undef to <16 x i8>
; CHECK: cost of 64 {{.*}} fptosi
; CHECK: cost of 128 {{.*}} fptosi
%r163 = fptosi <16 x double> undef to <16 x i8>
; CHECK: cost of 64 {{.*}} fptoui
; CHECK: cost of 128 {{.*}} fptoui
%r164 = fptoui <16 x double> undef to <16 x i16>
; CHECK: cost of 64 {{.*}} fptosi
; CHECK: cost of 128 {{.*}} fptosi
%r165 = fptosi <16 x double> undef to <16 x i16>
; CHECK: cost of 64 {{.*}} fptoui
; CHECK: cost of 128 {{.*}} fptoui
%r166 = fptoui <16 x double> undef to <16 x i32>
; CHECK: cost of 64 {{.*}} fptosi
; CHECK: cost of 128 {{.*}} fptosi
%r167 = fptosi <16 x double> undef to <16 x i32>
; CHECK: cost of 224 {{.*}} fptoui
; CHECK: cost of 256 {{.*}} fptoui
%r168 = fptoui <16 x double> undef to <16 x i64>
; CHECK: cost of 224 {{.*}} fptosi
; CHECK: cost of 256 {{.*}} fptosi
%r169 = fptosi <16 x double> undef to <16 x i64>
; CHECK: cost of 8 {{.*}} uitofp