[llvm] [RISCV] Use RISCV::RVVBitsPerBlock instead of 64 in getLMUL1VT. NFC (PR #144401)

[Craig Topper via llvm-commits]

https://github.com/topperc created https://github.com/llvm/llvm-project/pull/144401

None

>From 366a88ccc787d9992740f2e557671d0034a89218 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper at sifive.com>
Date: Mon, 16 Jun 2025 10:37:19 -0700
Subject: [PATCH] [RISCV] Use RISCV::RVVBitsPerBlock instead of 64 in
 getLMUL1VT. NFC

---
 llvm/lib/Target/RISCV/RISCVISelLowering.cpp        | 2 +-
 llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
index 7cfada6c0601c..779786fa400fc 100644
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -3499,7 +3499,7 @@ getVSlideup(SelectionDAG &DAG, const RISCVSubtarget &Subtarget, const SDLoc &DL,
 }
 
 static MVT getLMUL1VT(MVT VT) {
-  assert(VT.getVectorElementType().getSizeInBits() <= 64 &&
+  assert(VT.getVectorElementType().getSizeInBits() <= RISCV::RVVBitsPerBlock &&
          "Unexpected vector MVT");
   return MVT::getScalableVectorVT(
       VT.getVectorElementType(),
diff --git a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
index fcc9d3977e5cd..0093c92ea5ef0 100644
--- a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
+++ b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
@@ -604,7 +604,7 @@ InstructionCost RISCVTTIImpl::getSlideCost(FixedVectorType *Tp,
 
 // Consolidate!
 static MVT getLMUL1VT(MVT VT) {
-  assert(VT.getVectorElementType().getSizeInBits() <= 64 &&
+  assert(VT.getVectorElementType().getSizeInBits() <= RISCV::RVVBitsPerBlock &&
          "Unexpected vector MVT");
   return MVT::getScalableVectorVT(
       VT.getVectorElementType(),