[RISCV] Add tests for reverse shuffles of i1 vectors. NFC

This is to add test coverage for a change in #73342

Author: lukel97

llvm/test/Analysis/CostModel/RISCV/shuffle-reverse.ll

@@ -9,6 +9,10 @@
 define void @reverse() {
 ;
 ; CHECK-LABEL: 'reverse'
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %v2i1 = shufflevector <2 x i1> undef, <2 x i1> undef, <2 x i32> <i32 1, i32 0>
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %v4i1 = shufflevector <4 x i1> undef, <4 x i1> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %v8i1 = shufflevector <8 x i1> undef, <8 x i1> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %v16i1 = shufflevector <16 x i1> undef, <16 x i1> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 3 for instruction: %v2i8 = shufflevector <2 x i8> undef, <2 x i8> undef, <2 x i32> <i32 1, i32 0>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 3 for instruction: %v4i8 = shufflevector <4 x i8> undef, <4 x i8> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 3 for instruction: %v8i8 = shufflevector <8 x i8> undef, <8 x i8> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
@@ -34,6 +38,10 @@ define void @reverse() {
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 0 for instruction: ret void
 ;
 ; SIZE-LABEL: 'reverse'
+; SIZE-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %v2i1 = shufflevector <2 x i1> undef, <2 x i1> undef, <2 x i32> <i32 1, i32 0>
+; SIZE-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %v4i1 = shufflevector <4 x i1> undef, <4 x i1> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+; SIZE-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %v8i1 = shufflevector <8 x i1> undef, <8 x i1> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+; SIZE-NEXT:  Cost Model: Found an estimated cost of 6 for instruction: %v16i1 = shufflevector <16 x i1> undef, <16 x i1> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
 ; SIZE-NEXT:  Cost Model: Found an estimated cost of 3 for instruction: %v2i8 = shufflevector <2 x i8> undef, <2 x i8> undef, <2 x i32> <i32 1, i32 0>
 ; SIZE-NEXT:  Cost Model: Found an estimated cost of 3 for instruction: %v4i8 = shufflevector <4 x i8> undef, <4 x i8> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
 ; SIZE-NEXT:  Cost Model: Found an estimated cost of 3 for instruction: %v8i8 = shufflevector <8 x i8> undef, <8 x i8> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
@@ -58,6 +66,10 @@ define void @reverse() {
 ; SIZE-NEXT:  Cost Model: Found an estimated cost of 3 for instruction: %v4f64 = shufflevector <4 x double> undef, <4 x double> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
 ; SIZE-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: ret void
 ;
+  %v2i1 = shufflevector <2 x i1> undef, <2 x i1> undef, <2 x i32> <i32 1, i32 0>
+  %v4i1 = shufflevector <4 x i1> undef, <4 x i1> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
+  %v8i1 = shufflevector <8 x i1> undef, <8 x i1> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
+  %v16i1 = shufflevector <16 x i1> undef, <16 x i1> undef, <16 x i32> <i32 15, i32 14, i32 13, i32 12, i32 11, i32 10, i32 9, i32 8, i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>
   %v2i8 = shufflevector <2 x i8> undef, <2 x i8> undef, <2 x i32> <i32 1, i32 0>
   %v4i8 = shufflevector <4 x i8> undef, <4 x i8> undef, <4 x i32> <i32 3, i32 2, i32 1, i32 0>
   %v8i8 = shufflevector <8 x i8> undef, <8 x i8> undef, <8 x i32> <i32 7, i32 6, i32 5, i32 4, i32 3, i32 2, i32 1, i32 0>