diff --git a/compiler-rt/lib/builtins/ashldi3.c b/compiler-rt/lib/builtins/ashldi3.c
--- a/compiler-rt/lib/builtins/ashldi3.c
+++ b/compiler-rt/lib/builtins/ashldi3.c
@@ -28,7 +28,8 @@
     if (b == 0)
       return a;
     result.s.low = input.s.low << b;
-    result.s.high = (input.s.high << b) | (input.s.low >> (bits_in_word - b));
+    result.s.high =
+        ((su_int)input.s.high << b) | (input.s.low >> (bits_in_word - b));
   }
   return result.all;
 }
diff --git a/compiler-rt/lib/builtins/ashlti3.c b/compiler-rt/lib/builtins/ashlti3.c
--- a/compiler-rt/lib/builtins/ashlti3.c
+++ b/compiler-rt/lib/builtins/ashlti3.c
@@ -30,7 +30,8 @@
     if (b == 0)
       return a;
     result.s.low = input.s.low << b;
-    result.s.high = (input.s.high << b) | (input.s.low >> (bits_in_dword - b));
+    result.s.high =
+        ((du_int)input.s.high << b) | (input.s.low >> (bits_in_dword - b));
   }
   return result.all;
 }
diff --git a/compiler-rt/lib/builtins/ashrdi3.c b/compiler-rt/lib/builtins/ashrdi3.c
--- a/compiler-rt/lib/builtins/ashrdi3.c
+++ b/compiler-rt/lib/builtins/ashrdi3.c
@@ -29,7 +29,8 @@
     if (b == 0)
       return a;
     result.s.high = input.s.high >> b;
-    result.s.low = (input.s.high << (bits_in_word - b)) | (input.s.low >> b);
+    result.s.low =
+        ((su_int)input.s.high << (bits_in_word - b)) | (input.s.low >> b);
   }
   return result.all;
 }
diff --git a/compiler-rt/lib/builtins/ashrti3.c b/compiler-rt/lib/builtins/ashrti3.c
--- a/compiler-rt/lib/builtins/ashrti3.c
+++ b/compiler-rt/lib/builtins/ashrti3.c
@@ -31,7 +31,8 @@
     if (b == 0)
       return a;
     result.s.high = input.s.high >> b;
-    result.s.low = (input.s.high << (bits_in_dword - b)) | (input.s.low >> b);
+    result.s.low =
+        ((du_int)input.s.high << (bits_in_dword - b)) | (input.s.low >> b);
   }
   return result.all;
 }