[PATCH] D127511: [RISCV] Refine costs for i1 reductions

[LiqinWeng via Phabricator via llvm-commits]

Miss_Grape added inline comments.


================
Comment at: llvm/test/Analysis/CostModel/RISCV/reduce-add.ll:7
 ; CHECK-LABEL: 'reduce_i1'
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %V1 = call i1 @llvm.vector.reduce.add.v1i1(<1 x i1> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 11 for instruction: %V2 = call i1 @llvm.vector.reduce.add.v2i1(<2 x i1> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 41 for instruction: %V4 = call i1 @llvm.vector.reduce.add.v4i1(<4 x i1> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 121 for instruction: %V8 = call i1 @llvm.vector.reduce.add.v8i1(<8 x i1> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 321 for instruction: %V16 = call i1 @llvm.vector.reduce.add.v16i1(<16 x i1> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 801 for instruction: %V32 = call i1 @llvm.vector.reduce.add.v32i1(<32 x i1> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 1921 for instruction: %V64 = call i1 @llvm.vector.reduce.add.v64i1(<64 x i1> undef)
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 4481 for instruction: %V128 = call i1 @llvm.vector.reduce.add.v128i1(<128 x i1> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %V1 = call i1 @llvm.vector.reduce.add.v1i1(<1 x i1> undef)
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %V2 = call i1 @llvm.vector.reduce.add.v2i1(<2 x i1> undef)
----------------
why the costModel of v1i1 is not 5 but 2
{F24240693}


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D127511/new/

https://reviews.llvm.org/D127511