[InstCombine] precommit tests for D124590

llvm · May 6, 2022 · 53069de · 53069de
1 parent 4c8c101
commit 53069de
Showing 1 changed file with 30 additions and 0 deletions.
diff --git a/llvm/test/Transforms/InstCombine/sext.ll b/llvm/test/Transforms/InstCombine/sext.ll
@@ -395,3 +395,33 @@ define i16 @smear_set_bit_different_dest_type(i32 %x) {
   %s = sext i8 %a to i16
   ret i16 %s
 }
+
+; negative test - extra use
+
+define i16 @smear_set_bit_different_dest_type_extra_use(i32 %x) {
+; CHECK-LABEL: @smear_set_bit_different_dest_type_extra_use(
+; CHECK-NEXT:    [[T:%.*]] = trunc i32 [[X:%.*]] to i8
+; CHECK-NEXT:    call void @use(i8 [[T]])
+; CHECK-NEXT:    [[A:%.*]] = ashr i8 [[T]], 7
+; CHECK-NEXT:    [[S:%.*]] = sext i8 [[A]] to i16
+; CHECK-NEXT:    ret i16 [[S]]
+;
+  %t = trunc i32 %x to i8
+  call void @use(i8 %t)
+  %a = ashr i8 %t, 7
+  %s = sext i8 %a to i16
+  ret i16 %s
+}
+
+define i64 @smear_set_bit_different_dest_type_wider_dst(i32 %x) {
+; CHECK-LABEL: @smear_set_bit_different_dest_type_wider_dst(
+; CHECK-NEXT:    [[T:%.*]] = trunc i32 [[X:%.*]] to i8
+; CHECK-NEXT:    [[A:%.*]] = ashr i8 [[T]], 7
+; CHECK-NEXT:    [[S:%.*]] = sext i8 [[A]] to i64
+; CHECK-NEXT:    ret i64 [[S]]
+;
+  %t = trunc i32 %x to i8
+  %a = ashr i8 %t, 7
+  %s = sext i8 %a to i64
+  ret i64 %s
+}