[llvm] [InstCombine] Fold comparisons of llvm.usub.sat result with its LHS (PR #214108)

[Andreas Jonson via llvm-commits]

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@@ -425,6 +425,88 @@ define <2 x i1> @icmp_eq_vector_multiuse_negative_equal(<2 x i8> %arg) {
   ret <2 x i1> %cmp
 }
 
+define i1 @icmp_eq_lhs_nonzero_constant(i64 %x) {
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andjo403 wrote:

add usub_sat to the name of the tests maybe

https://github.com/llvm/llvm-project/pull/214108