[llvm] [WIP][RISCV] Tune flag for fast vrgather.vv (PR #124664)

[Petr Penzin via llvm-commits]

================
@@ -3,6 +3,8 @@
 ; RUN: opt < %s -passes="print<cost-model>" 2>&1 -disable-output -mtriple=riscv32 -mattr=+v,+f,+d,+zfh,+zvfhmin | FileCheck %s
 ; RUN: opt < %s -passes="print<cost-model>" -cost-kind=code-size 2>&1 -disable-output -mtriple=riscv32 -mattr=+v,+f,+d,+zfh,+zvfh | FileCheck %s --check-prefix=SIZE
 ; RUN: opt < %s -passes="print<cost-model>" -cost-kind=code-size 2>&1 -disable-output -mtriple=riscv32 -mattr=+v,+f,+d,+zfh,+zvfhmin | FileCheck %s --check-prefix=SIZE
+; RUN: opt < %s -passes="print<cost-model>" -cost-kind=code-size 2>&1 -disable-output -mtriple=riscv32 -mattr=+v,+f,+d,+zfh,+zvfh,+fast-vrgather | FileCheck %s --check-prefix=FAST-VRG
----------------
ppenzin wrote:

Addressed

https://github.com/llvm/llvm-project/pull/124664