[llvm][Hexagon] Promote operand v2i1 to v2i32 (#135409)

Fixes #118879

Author: iajbar

llvm/lib/Target/Hexagon/HexagonCallingConv.td

@@ -65,6 +65,7 @@ def CC_Hexagon: CallingConv<[
   CCIfType<[i32],
     CCIfSplit<
       CCCustom<"CC_SkipOdd">>>,
+  CCIfType<[v2i1],  CCPromoteToType<v2i32>>,
   CCIfType<[v4i1],  CCPromoteToType<v4i16>>,
   CCIfType<[v8i1],  CCPromoteToType<v8i8>>,
 

llvm/test/CodeGen/Hexagon/calloperand-v2i1.ll

@@ -0,0 +1,14 @@
+;RUN: llc -mtriple=hexagon  < %s | FileCheck %s
+
+; Check that v2i1 type is promoted to v2i32.
+; CHECK: call f
+; CHECK: r{{[0-9]+}}:{{[0-9]+}} = memd(r29+#8)
+
+define  <2 x i1> @test(<2 x i1> %1) {
+Entry:
+   %2 = call <2 x i1> @f(<2 x i1> %1)
+  ret <2 x i1> %2
+
+  }
+
+declare <2 x i1> @f(<2 x i1>)