[AArch64] Use unsigned variant of <s|u>addv_64 SVE vector reduction intrinsic for 64 bit values

Resolves #157122

When lowering this intrinsic, we are querying the first result type (i.e `getValueType(0)`)
which may not always be true hence giving wrong the extended value type.

Author: Rajveer100

llvm/lib/Target/AArch64/AArch64ISelLowering.cpp

@@ -22396,7 +22396,7 @@ static SDValue performIntrinsicCombine(SDNode *N,
     return tryCombineCRC32(0xffff, N, DAG);
   case Intrinsic::aarch64_sve_saddv:
     // There is no i64 version of SADDV because the sign is irrelevant.
-    if (N->getOperand(2)->getValueType(0).getVectorElementType() == MVT::i64)
+    if (N->getOperand(2).getValueType().getVectorElementType() == MVT::i64)
       return combineSVEReductionInt(N, AArch64ISD::UADDV_PRED, DAG);
     else
       return combineSVEReductionInt(N, AArch64ISD::SADDV_PRED, DAG);

llvm/test/CodeGen/AArch64/sve-saddv_64.ll

@@ -0,0 +1,23 @@
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
+; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sve < %s | FileCheck %s
+
+; Function Attrs: mustprogress nounwind ssp uwtable(sync) vscale_range(1,16)
+define noundef i64 @svaddv_SVBool_SVInt64_t(<vscale x 16 x i1> %a, <vscale x 2 x i64> %b) {
+; CHECK-LABEL: svaddv_SVBool_SVInt64_t:
+; CHECK:       // %bb.0: // %entry
+; CHECK-NEXT:    //APP
+; CHECK-NEXT:    //NO_APP
+; CHECK-NEXT:    uaddv d0, p0, z0.d
+; CHECK-NEXT:    fmov x0, d0
+; CHECK-NEXT:    ret
+entry:
+  %0 = tail call { <vscale x 16 x i1>, <vscale x 2 x i64> } asm sideeffect "", "=@3Upa,=w,0,1"(<vscale x 16 x i1> %a, <vscale x 2 x i64> %b)
+  %asmresult = extractvalue { <vscale x 16 x i1>, <vscale x 2 x i64> } %0, 0
+  %asmresult1 = extractvalue { <vscale x 16 x i1>, <vscale x 2 x i64> } %0, 1
+  %1 = tail call <vscale x 2 x i1> @llvm.aarch64.sve.convert.from.svbool.nxv2i1(<vscale x 16 x i1> %asmresult)
+  %2 = tail call i64 @llvm.aarch64.sve.saddv.nxv2i64(<vscale x 2 x i1> %1, <vscale x 2 x i64> %asmresult1)
+  ret i64 %2
+}
+
+declare <vscale x 2 x i1> @llvm.aarch64.sve.convert.from.svbool.nxv2i1(<vscale x 16 x i1>)
+declare i64 @llvm.aarch64.sve.saddv.nxv2i64(<vscale x 2 x i1>, <vscale x 2 x i64>)