[InstSimplify] Add tests for f16 to i128 range (NFC)

Author: nikic

llvm/test/Transforms/InstSimplify/fptoi-range.ll

@@ -32,6 +32,17 @@ define i1 @f16_si16_max2(half %f) {
   ret i1 %c
 }
 
+define i1 @f16_si128_max2(half %f) {
+; CHECK-LABEL: @f16_si128_max2(
+; CHECK-NEXT:    [[I:%.*]] = fptosi half [[F:%.*]] to i128
+; CHECK-NEXT:    [[C:%.*]] = icmp sgt i128 [[I]], 65504
+; CHECK-NEXT:    ret i1 [[C]]
+;
+  %i = fptosi half %f to i128
+  %c = icmp sgt i128 %i, 65504
+  ret i1 %c
+}
+
 define i1 @f16_si_min1(half %f) {
 ; CHECK-LABEL: @f16_si_min1(
 ; CHECK-NEXT:    ret i1 true
@@ -41,6 +52,17 @@ define i1 @f16_si_min1(half %f) {
   ret i1 %c
 }
 
+define i1 @f16_si128_min1(half %f) {
+; CHECK-LABEL: @f16_si128_min1(
+; CHECK-NEXT:    [[I:%.*]] = fptosi half [[F:%.*]] to i128
+; CHECK-NEXT:    [[C:%.*]] = icmp sge i128 [[I]], -65504
+; CHECK-NEXT:    ret i1 [[C]]
+;
+  %i = fptosi half %f to i128
+  %c = icmp sge i128 %i, -65504
+  ret i1 %c
+}
+
 define i1 @f16_si16_min1(half %f) {
 ; CHECK-LABEL: @f16_si16_min1(
 ; CHECK-NEXT:    [[I:%.*]] = fptosi half [[F:%.*]] to i16