[CostModel][X86] teach TTI calculate cost of chain of vector inserts/extracts more precisely and correctly:In each 128-lane, if there is at least one index is demanded and not all indices are demanded...
In each 128-lane, if there is at least one index is demanded and not all
indices are demanded and this 128-lane is not the first 128-lane of the
legalized-vector, then this 128-lane needs a extracti128;
If in each 128-lane, there is at least one index is demanded, this 128-lane
needs a inserti128.
The following cases will help you build a better understanding:
Assume we insert several elements into a v8i32 vector in avx2,
Case#1: inserting into 1th index needs vpinsrd + inserti128
Case#2: inserting into 5th index needs extracti128 + vpinsrd +
inserti128
Case#3: inserting into 4,5,6,7 index needs 4*vpinsrd + inserti128.
Reviewed By: pengfei, RKSimon
Differential Revision: https://reviews.llvm.org/D89767
diff --git a/llvm/test/Analysis/CostModel/X86/arith-fp.ll b/llvm/test/Analysis/CostModel/X86/arith-fp.ll
index 9b0a5ff..bb5e407 100644
--- a/llvm/test/Analysis/CostModel/X86/arith-fp.ll
+++ b/llvm/test/Analysis/CostModel/X86/arith-fp.ll
@@ -707,8 +707,8 @@
; AVX-LABEL: 'frem'
; AVX-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %F32 = frem float undef, undef
; AVX-NEXT: Cost Model: Found an estimated cost of 14 for instruction: %V4F32 = frem <4 x float> undef, undef
-; AVX-NEXT: Cost Model: Found an estimated cost of 33 for instruction: %V8F32 = frem <8 x float> undef, undef
-; AVX-NEXT: Cost Model: Found an estimated cost of 66 for instruction: %V16F32 = frem <16 x float> undef, undef
+; AVX-NEXT: Cost Model: Found an estimated cost of 34 for instruction: %V8F32 = frem <8 x float> undef, undef
+; AVX-NEXT: Cost Model: Found an estimated cost of 68 for instruction: %V16F32 = frem <16 x float> undef, undef
; AVX-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %F64 = frem double undef, undef
; AVX-NEXT: Cost Model: Found an estimated cost of 6 for instruction: %V2F64 = frem <2 x double> undef, undef
; AVX-NEXT: Cost Model: Found an estimated cost of 15 for instruction: %V4F64 = frem <4 x double> undef, undef
@@ -718,8 +718,8 @@
; AVX512-LABEL: 'frem'
; AVX512-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %F32 = frem float undef, undef
; AVX512-NEXT: Cost Model: Found an estimated cost of 14 for instruction: %V4F32 = frem <4 x float> undef, undef
-; AVX512-NEXT: Cost Model: Found an estimated cost of 33 for instruction: %V8F32 = frem <8 x float> undef, undef
-; AVX512-NEXT: Cost Model: Found an estimated cost of 71 for instruction: %V16F32 = frem <16 x float> undef, undef
+; AVX512-NEXT: Cost Model: Found an estimated cost of 34 for instruction: %V8F32 = frem <8 x float> undef, undef
+; AVX512-NEXT: Cost Model: Found an estimated cost of 72 for instruction: %V16F32 = frem <16 x float> undef, undef
; AVX512-NEXT: Cost Model: Found an estimated cost of 2 for instruction: %F64 = frem double undef, undef
; AVX512-NEXT: Cost Model: Found an estimated cost of 6 for instruction: %V2F64 = frem <2 x double> undef, undef
; AVX512-NEXT: Cost Model: Found an estimated cost of 15 for instruction: %V4F64 = frem <4 x double> undef, undef
@@ -1093,8 +1093,8 @@
; AVX-LABEL: 'fma'
; AVX-NEXT: Cost Model: Found an estimated cost of 10 for instruction: %F32 = call float @llvm.fma.f32(float undef, float undef, float undef)
; AVX-NEXT: Cost Model: Found an estimated cost of 43 for instruction: %V4F32 = call <4 x float> @llvm.fma.v4f32(<4 x float> undef, <4 x float> undef, <4 x float> undef)
-; AVX-NEXT: Cost Model: Found an estimated cost of 87 for instruction: %V8F32 = call <8 x float> @llvm.fma.v8f32(<8 x float> undef, <8 x float> undef, <8 x float> undef)
-; AVX-NEXT: Cost Model: Found an estimated cost of 174 for instruction: %V16F32 = call <16 x float> @llvm.fma.v16f32(<16 x float> undef, <16 x float> undef, <16 x float> undef)
+; AVX-NEXT: Cost Model: Found an estimated cost of 88 for instruction: %V8F32 = call <8 x float> @llvm.fma.v8f32(<8 x float> undef, <8 x float> undef, <8 x float> undef)
+; AVX-NEXT: Cost Model: Found an estimated cost of 176 for instruction: %V16F32 = call <16 x float> @llvm.fma.v16f32(<16 x float> undef, <16 x float> undef, <16 x float> undef)
; AVX-NEXT: Cost Model: Found an estimated cost of 10 for instruction: %F64 = call double @llvm.fma.f64(double undef, double undef, double undef)
; AVX-NEXT: Cost Model: Found an estimated cost of 21 for instruction: %V2F64 = call <2 x double> @llvm.fma.v2f64(<2 x double> undef, <2 x double> undef, <2 x double> undef)
; AVX-NEXT: Cost Model: Found an estimated cost of 43 for instruction: %V4F64 = call <4 x double> @llvm.fma.v4f64(<4 x double> undef, <4 x double> undef, <4 x double> undef)