[llvm] [RISCV][GISel] Fallback to SelectionDAG for RVV tuple intrinsics. (PR #162133)

[Craig Topper via llvm-commits]

https://github.com/topperc created https://github.com/llvm/llvm-project/pull/162133

These intrinsics currently crash in translateCall.

>From a2356d1e8326e17b0e445017f25be205c82f85a5 Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper at sifive.com>
Date: Mon, 6 Oct 2025 12:02:41 -0700
Subject: [PATCH] [RISCV][GISel] Fallback to SelectionDAG for RVV tuple
 intrinsics.

---
 llvm/lib/Target/RISCV/RISCVISelLowering.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
index dcce2d29a7042..efbc103642993 100644
--- a/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
+++ b/llvm/lib/Target/RISCV/RISCVISelLowering.cpp
@@ -25031,8 +25031,17 @@ bool RISCVTargetLowering::fallBackToDAGISel(const Instruction &Inst) const {
 
   if (auto *II = dyn_cast<IntrinsicInst>(&Inst)) {
     // Mark RVV intrinsic as supported.
-    if (RISCVVIntrinsicsTable::getRISCVVIntrinsicInfo(II->getIntrinsicID()))
+    if (RISCVVIntrinsicsTable::getRISCVVIntrinsicInfo(II->getIntrinsicID())) {
+      // GISel doesn't support tuple types yet.
+      if (Inst.getType()->isRISCVVectorTupleTy())
+        return true;
+
+      for (unsigned i = 0; i < II->arg_size(); ++i)
+        if (II->getArgOperand(i)->getType()->isRISCVVectorTupleTy())
+          return true;
+
       return false;
+    }
   }
 
   if (Inst.getType()->isScalableTy())