[llvm] 37ec709 - [X86][CostModel] Update truncate costs for some narrow vector cases to match their wider version.
Craig Topper via llvm-commits
llvm-commits at lists.llvm.org
Mon Apr 27 14:17:10 PDT 2020
Author: Craig Topper
Date: 2020-04-27T13:47:48-07:00
New Revision: 37ec7092331428bdddc1902d7176972480563eca
URL: https://github.com/llvm/llvm-project/commit/37ec7092331428bdddc1902d7176972480563eca
DIFF: https://github.com/llvm/llvm-project/commit/37ec7092331428bdddc1902d7176972480563eca.diff
LOG: [X86][CostModel] Update truncate costs for some narrow vector cases to match their wider version.
This updates v4i16->v4i8 with sse2 to match v8i16->v8i8.
Update v2i16->v2i8 and v4i16->v4i8 with sse 4.1 to match v8i16->v8i8.
Added:
Modified:
llvm/lib/Target/X86/X86TargetTransformInfo.cpp
llvm/test/Analysis/CostModel/X86/sse-itoi.ll
llvm/test/Analysis/CostModel/X86/trunc.ll
Removed:
################################################################################
diff --git a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
index e40acf305ebf..9b2be2af7956 100644
--- a/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
+++ b/llvm/lib/Target/X86/X86TargetTransformInfo.cpp
@@ -1778,7 +1778,8 @@ int X86TTIImpl::getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src,
{ ISD::ZERO_EXTEND, MVT::v16i32, MVT::v16i16, 4 },
{ ISD::SIGN_EXTEND, MVT::v16i32, MVT::v16i16, 4 },
- { ISD::TRUNCATE, MVT::v4i8, MVT::v4i16, 2 },
+ { ISD::TRUNCATE, MVT::v2i8, MVT::v2i16, 1 },
+ { ISD::TRUNCATE, MVT::v4i8, MVT::v4i16, 1 },
{ ISD::TRUNCATE, MVT::v8i8, MVT::v8i16, 1 },
{ ISD::TRUNCATE, MVT::v4i8, MVT::v4i32, 1 },
{ ISD::TRUNCATE, MVT::v4i16, MVT::v4i32, 1 },
@@ -1868,10 +1869,10 @@ int X86TTIImpl::getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src,
{ ISD::SIGN_EXTEND, MVT::v4i64, MVT::v4i32, 5 },
{ ISD::TRUNCATE, MVT::v2i8, MVT::v2i16, 2 }, // PAND+PACKUSWB
- { ISD::TRUNCATE, MVT::v4i8, MVT::v4i16, 4 },
- { ISD::TRUNCATE, MVT::v8i8, MVT::v8i16, 2 },
+ { ISD::TRUNCATE, MVT::v4i8, MVT::v4i16, 2 }, // PAND+PACKUSWB
+ { ISD::TRUNCATE, MVT::v8i8, MVT::v8i16, 2 }, // PAND+PACKUSWB
{ ISD::TRUNCATE, MVT::v16i8, MVT::v16i16, 3 },
- { ISD::TRUNCATE, MVT::v2i8, MVT::v2i32, 3 }, // PAND+3*PACKUSWB
+ { ISD::TRUNCATE, MVT::v2i8, MVT::v2i32, 3 }, // PAND+2*PACKUSWB
{ ISD::TRUNCATE, MVT::v2i16, MVT::v2i32, 1 },
{ ISD::TRUNCATE, MVT::v4i8, MVT::v4i32, 3 },
{ ISD::TRUNCATE, MVT::v4i16, MVT::v4i32, 3 },
diff --git a/llvm/test/Analysis/CostModel/X86/sse-itoi.ll b/llvm/test/Analysis/CostModel/X86/sse-itoi.ll
index 3d18ad8a06b1..a17b75769879 100644
--- a/llvm/test/Analysis/CostModel/X86/sse-itoi.ll
+++ b/llvm/test/Analysis/CostModel/X86/sse-itoi.ll
@@ -584,13 +584,13 @@ define void @truncate_v8i16_to_v8i8(<8 x i16>* %a) {
define void @truncate_v4i16_to_v4i8(<4 x i16>* %a) {
; SSE2-LABEL: 'truncate_v4i16_to_v4i8'
; SSE2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %1 = load <4 x i16>, <4 x i16>* %a
-; SSE2-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %2 = trunc <4 x i16> %1 to <4 x i8>
+; SSE2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %2 = trunc <4 x i16> %1 to <4 x i8>
; SSE2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: store <4 x i8> %2, <4 x i8>* undef, align 4
; SSE2-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret void
;
; SSE41-LABEL: 'truncate_v4i16_to_v4i8'
; SSE41-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %1 = load <4 x i16>, <4 x i16>* %a
-; SSE41-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %2 = trunc <4 x i16> %1 to <4 x i8>
+; SSE41-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %2 = trunc <4 x i16> %1 to <4 x i8>
; SSE41-NEXT: Cost Model: Found an estimated cost of 1 for instruction: store <4 x i8> %2, <4 x i8>* undef, align 4
; SSE41-NEXT: Cost Model: Found an estimated cost of 0 for instruction: ret void
;
diff --git a/llvm/test/Analysis/CostModel/X86/trunc.ll b/llvm/test/Analysis/CostModel/X86/trunc.ll
index 515bd701e18a..85ed9d06f19f 100644
--- a/llvm/test/Analysis/CostModel/X86/trunc.ll
+++ b/llvm/test/Analysis/CostModel/X86/trunc.ll
@@ -175,7 +175,7 @@ define i32 @trunc_vXi8() {
; SSE2-NEXT: Cost Model: Found an estimated cost of 15 for instruction: %V32i32 = trunc <32 x i32> undef to <32 x i8>
; SSE2-NEXT: Cost Model: Found an estimated cost of 31 for instruction: %V64i32 = trunc <64 x i32> undef to <64 x i8>
; SSE2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V2i16 = trunc <2 x i16> undef to <2 x i8>
-; SSE2-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %V4i16 = trunc <4 x i16> undef to <4 x i8>
+; SSE2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V4i16 = trunc <4 x i16> undef to <4 x i8>
; SSE2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V8i16 = trunc <8 x i16> undef to <8 x i8>
; SSE2-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %V16i16 = trunc <16 x i16> undef to <16 x i8>
; SSE2-NEXT: Cost Model: Found an estimated cost of 7 for instruction: %V32i16 = trunc <32 x i16> undef to <32 x i8>
@@ -196,7 +196,7 @@ define i32 @trunc_vXi8() {
; SSSE3-NEXT: Cost Model: Found an estimated cost of 15 for instruction: %V32i32 = trunc <32 x i32> undef to <32 x i8>
; SSSE3-NEXT: Cost Model: Found an estimated cost of 31 for instruction: %V64i32 = trunc <64 x i32> undef to <64 x i8>
; SSSE3-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V2i16 = trunc <2 x i16> undef to <2 x i8>
-; SSSE3-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %V4i16 = trunc <4 x i16> undef to <4 x i8>
+; SSSE3-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V4i16 = trunc <4 x i16> undef to <4 x i8>
; SSSE3-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V8i16 = trunc <8 x i16> undef to <8 x i8>
; SSSE3-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %V16i16 = trunc <16 x i16> undef to <16 x i8>
; SSSE3-NEXT: Cost Model: Found an estimated cost of 7 for instruction: %V32i16 = trunc <32 x i16> undef to <32 x i8>
@@ -216,8 +216,8 @@ define i32 @trunc_vXi8() {
; SSE42-NEXT: Cost Model: Found an estimated cost of 7 for instruction: %V16i32 = trunc <16 x i32> undef to <16 x i8>
; SSE42-NEXT: Cost Model: Found an estimated cost of 15 for instruction: %V32i32 = trunc <32 x i32> undef to <32 x i8>
; SSE42-NEXT: Cost Model: Found an estimated cost of 31 for instruction: %V64i32 = trunc <64 x i32> undef to <64 x i8>
-; SSE42-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V2i16 = trunc <2 x i16> undef to <2 x i8>
-; SSE42-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V4i16 = trunc <4 x i16> undef to <4 x i8>
+; SSE42-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V2i16 = trunc <2 x i16> undef to <2 x i8>
+; SSE42-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V4i16 = trunc <4 x i16> undef to <4 x i8>
; SSE42-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V8i16 = trunc <8 x i16> undef to <8 x i8>
; SSE42-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %V16i16 = trunc <16 x i16> undef to <16 x i8>
; SSE42-NEXT: Cost Model: Found an estimated cost of 7 for instruction: %V32i16 = trunc <32 x i16> undef to <32 x i8>
@@ -237,8 +237,8 @@ define i32 @trunc_vXi8() {
; AVX1-NEXT: Cost Model: Found an estimated cost of 7 for instruction: %V16i32 = trunc <16 x i32> undef to <16 x i8>
; AVX1-NEXT: Cost Model: Found an estimated cost of 15 for instruction: %V32i32 = trunc <32 x i32> undef to <32 x i8>
; AVX1-NEXT: Cost Model: Found an estimated cost of 31 for instruction: %V64i32 = trunc <64 x i32> undef to <64 x i8>
-; AVX1-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V2i16 = trunc <2 x i16> undef to <2 x i8>
-; AVX1-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V4i16 = trunc <4 x i16> undef to <4 x i8>
+; AVX1-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V2i16 = trunc <2 x i16> undef to <2 x i8>
+; AVX1-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V4i16 = trunc <4 x i16> undef to <4 x i8>
; AVX1-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V8i16 = trunc <8 x i16> undef to <8 x i8>
; AVX1-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %V16i16 = trunc <16 x i16> undef to <16 x i8>
; AVX1-NEXT: Cost Model: Found an estimated cost of 9 for instruction: %V32i16 = trunc <32 x i16> undef to <32 x i8>
@@ -258,8 +258,8 @@ define i32 @trunc_vXi8() {
; AVX2-NEXT: Cost Model: Found an estimated cost of 7 for instruction: %V16i32 = trunc <16 x i32> undef to <16 x i8>
; AVX2-NEXT: Cost Model: Found an estimated cost of 15 for instruction: %V32i32 = trunc <32 x i32> undef to <32 x i8>
; AVX2-NEXT: Cost Model: Found an estimated cost of 31 for instruction: %V64i32 = trunc <64 x i32> undef to <64 x i8>
-; AVX2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V2i16 = trunc <2 x i16> undef to <2 x i8>
-; AVX2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V4i16 = trunc <4 x i16> undef to <4 x i8>
+; AVX2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V2i16 = trunc <2 x i16> undef to <2 x i8>
+; AVX2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V4i16 = trunc <4 x i16> undef to <4 x i8>
; AVX2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V8i16 = trunc <8 x i16> undef to <8 x i8>
; AVX2-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %V16i16 = trunc <16 x i16> undef to <16 x i8>
; AVX2-NEXT: Cost Model: Found an estimated cost of 9 for instruction: %V32i16 = trunc <32 x i16> undef to <32 x i8>
@@ -279,8 +279,8 @@ define i32 @trunc_vXi8() {
; AVX512F-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V16i32 = trunc <16 x i32> undef to <16 x i8>
; AVX512F-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %V32i32 = trunc <32 x i32> undef to <32 x i8>
; AVX512F-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V64i32 = trunc <64 x i32> undef to <64 x i8>
-; AVX512F-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V2i16 = trunc <2 x i16> undef to <2 x i8>
-; AVX512F-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V4i16 = trunc <4 x i16> undef to <4 x i8>
+; AVX512F-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V2i16 = trunc <2 x i16> undef to <2 x i8>
+; AVX512F-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V4i16 = trunc <4 x i16> undef to <4 x i8>
; AVX512F-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V8i16 = trunc <8 x i16> undef to <8 x i8>
; AVX512F-NEXT: Cost Model: Found an estimated cost of 3 for instruction: %V16i16 = trunc <16 x i16> undef to <16 x i8>
; AVX512F-NEXT: Cost Model: Found an estimated cost of 8 for instruction: %V32i16 = trunc <32 x i16> undef to <32 x i8>
@@ -300,8 +300,8 @@ define i32 @trunc_vXi8() {
; AVX512BW-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V16i32 = trunc <16 x i32> undef to <16 x i8>
; AVX512BW-NEXT: Cost Model: Found an estimated cost of 0 for instruction: %V32i32 = trunc <32 x i32> undef to <32 x i8>
; AVX512BW-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V64i32 = trunc <64 x i32> undef to <64 x i8>
-; AVX512BW-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V2i16 = trunc <2 x i16> undef to <2 x i8>
-; AVX512BW-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V4i16 = trunc <4 x i16> undef to <4 x i8>
+; AVX512BW-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V2i16 = trunc <2 x i16> undef to <2 x i8>
+; AVX512BW-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V4i16 = trunc <4 x i16> undef to <4 x i8>
; AVX512BW-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V8i16 = trunc <8 x i16> undef to <8 x i8>
; AVX512BW-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V16i16 = trunc <16 x i16> undef to <16 x i8>
; AVX512BW-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V32i16 = trunc <32 x i16> undef to <32 x i8>
@@ -321,8 +321,8 @@ define i32 @trunc_vXi8() {
; BTVER2-NEXT: Cost Model: Found an estimated cost of 7 for instruction: %V16i32 = trunc <16 x i32> undef to <16 x i8>
; BTVER2-NEXT: Cost Model: Found an estimated cost of 15 for instruction: %V32i32 = trunc <32 x i32> undef to <32 x i8>
; BTVER2-NEXT: Cost Model: Found an estimated cost of 31 for instruction: %V64i32 = trunc <64 x i32> undef to <64 x i8>
-; BTVER2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V2i16 = trunc <2 x i16> undef to <2 x i8>
-; BTVER2-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %V4i16 = trunc <4 x i16> undef to <4 x i8>
+; BTVER2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V2i16 = trunc <2 x i16> undef to <2 x i8>
+; BTVER2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V4i16 = trunc <4 x i16> undef to <4 x i8>
; BTVER2-NEXT: Cost Model: Found an estimated cost of 1 for instruction: %V8i16 = trunc <8 x i16> undef to <8 x i8>
; BTVER2-NEXT: Cost Model: Found an estimated cost of 4 for instruction: %V16i16 = trunc <16 x i16> undef to <16 x i8>
; BTVER2-NEXT: Cost Model: Found an estimated cost of 9 for instruction: %V32i16 = trunc <32 x i16> undef to <32 x i8>
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