move to separate test with native integer widths

Author: wenju-he

llvm/test/Transforms/InstCombine/sext.ll

@@ -320,17 +320,6 @@ define i10 @test19(i10 %i) {
   ret i10 %d
 }
 
-define i32 @test20(i64 %i) {
-; CHECK-LABEL: @test20(
-; CHECK-NEXT:    [[A:%.*]] = trunc i64 [[I:%.*]] to i16
-; CHECK-NEXT:    [[B:%.*]] = sext i16 [[A]] to i32
-; CHECK-NEXT:    ret i32 [[B]]
-;
-  %a = trunc i64 %i to i16
-  %b = sext i16 %a to i32
-  ret i32 %b
-}
-
 define i32 @smear_set_bit(i32 %x) {
 ; CHECK-LABEL: @smear_set_bit(
 ; CHECK-NEXT:    [[TMP1:%.*]] = shl i32 [[X:%.*]], 24

llvm/test/Transforms/InstCombine/trunc-sext.ll

@@ -0,0 +1,16 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
+
+target datalayout = "i16:16:16-i32:32:32-i64:64:64-n16:32:64"
+
+define i32 @test(i64 %i) {
+; CHECK-LABEL: define i32 @test(
+; CHECK-SAME: i64 [[I:%.*]]) {
+; CHECK-NEXT:    [[A:%.*]] = trunc i64 [[I]] to i16
+; CHECK-NEXT:    [[B:%.*]] = sext i16 [[A]] to i32
+; CHECK-NEXT:    ret i32 [[B]]
+;
+  %a = trunc i64 %i to i16
+  %b = sext i16 %a to i32
+  ret i32 %b
+}