[llvm] [GlobalISel] Add G_ABDS and G_ABDU instructions (PR #118122)

[Thorsten Schütt via llvm-commits]

================
@@ -6,6 +6,14 @@ name:            g_abd_su
 body: |
   bb.0:
 
+    %2:_(p0) = G_IMPLICIT_DEF
+    %3:_(p0) = G_IMPLICIT_DEF
+    %4:_(s1) = G_ABDS %2, %3
----------------
tschuett wrote:

I removed the C++ error checking code under the assumption that the parameters are types and not ptypes and some other part of the system checks for misbehaviour.

https://github.com/llvm/llvm-project/pull/118122