[llvm] [SDAG] Fix fmaximum legalization errors (PR #142170)

[via llvm-commits]

================
@@ -1476,7 +1476,7 @@ define <2 x bfloat> @test_maximum_v2(<2 x bfloat> %a, <2 x bfloat> %b) {
 ; SM70-LABEL: test_maximum_v2(
 ; SM70:       {
 ; SM70-NEXT:    .reg .pred %p<11>;
-; SM70-NEXT:    .reg .b16 %rs<15>;
+; SM70-NEXT:    .reg .b16 %rs<19>;
----------------
gonzalobg wrote:

@AlexMaclean this seems to increase the register usage ?

https://github.com/llvm/llvm-project/pull/142170