[llvm] [RISCV] Remove ST->hasVInstructions() from getIntrinsicInstrCost for cttz/ctlz/ctpop. NFC. (PR #154064)

via llvm-commits llvm-commits at lists.llvm.org
Sun Aug 17 22:58:20 PDT 2025


llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-risc-v

Author: Jim Lin (tclin914)

<details>
<summary>Changes</summary>

That isn't necessary if we've checked ST->hasStdExtZvbb().

---
Full diff: https://github.com/llvm/llvm-project/pull/154064.diff


1 Files Affected:

- (modified) llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp (+1-1) 


``````````diff
diff --git a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
index af78b3cc2c7ff..85b3059d87da7 100644
--- a/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
+++ b/llvm/lib/Target/RISCV/RISCVTargetTransformInfo.cpp
@@ -1431,7 +1431,7 @@ RISCVTTIImpl::getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
   case Intrinsic::ctlz:
   case Intrinsic::ctpop: {
     auto LT = getTypeLegalizationCost(RetTy);
-    if (ST->hasVInstructions() && ST->hasStdExtZvbb() && LT.second.isVector()) {
+    if (ST->hasStdExtZvbb() && LT.second.isVector()) {
       unsigned Op;
       switch (ICA.getID()) {
       case Intrinsic::cttz:

``````````

</details>


https://github.com/llvm/llvm-project/pull/154064


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