[llvm] [RISCV] Remove unused argument check (NFC) (PR #168313)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

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

Author: Garth Lei (garthlei)

<details>
<summary>Changes</summary>

The index == 0 scenerio has already been handled by the early return, so only the upper half scenerio is relevant here.

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Full diff: https://github.com/llvm/llvm-project/pull/168313.diff


1 Files Affected:

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


``````````diff
diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
index 38cce26e44af4..c6eb0e929f93d 100644
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -2539,7 +2539,7 @@ bool RISCVTargetLowering::isExtractSubvectorCheap(EVT ResVT, EVT SrcVT,
   // TODO: For sizes which aren't multiples of VLEN sizes, this may not be
   // a cheap extract.  However, this case is important in practice for
   // shuffled extracts of longer vectors.  How resolve?
-  return (ResElts * 2) == SrcElts && (Index == 0 || Index == ResElts);
+  return (ResElts * 2) == SrcElts && Index == ResElts;
 }
 
 MVT RISCVTargetLowering::getRegisterTypeForCallingConv(LLVMContext &Context,

``````````

</details>


https://github.com/llvm/llvm-project/pull/168313