[llvm] [RISCV][llvm] Preliminary P extension codegen support (PR #162668)

[Craig Topper via llvm-commits]

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@@ -8134,6 +8233,17 @@ SDValue RISCVTargetLowering::LowerOperation(SDValue Op,
     auto *Store = cast<StoreSDNode>(Op);
     SDValue StoredVal = Store->getValue();
     EVT VT = StoredVal.getValueType();
+    if (Subtarget.hasStdExtP()) {
+      if (VT == MVT::v2i16 || VT == MVT::v4i8) {
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topperc wrote:

How hard is it to support the extract_vector_elt? We need to do it eventually anyway.

https://github.com/llvm/llvm-project/pull/162668