[PATCH] D123835: AMDGPU/SDAG: Refine the fold to v_mad_[iu]64_[iu]32

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

I  would have expected this to put this back together after the generic multiply expansion though.

Also it would be nice to get this one ported to GlobalISel



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Comment at: llvm/test/CodeGen/AMDGPU/mad_64_32.ll:535-539
+; CI-NEXT:    v_mad_i64_i32 v[0:1], s[4:5], v0, v1, 0
+; CI-NEXT:    v_add_i32_e32 v2, vcc, v0, v2
+; CI-NEXT:    v_addc_u32_e32 v3, vcc, v1, v3, vcc
+; CI-NEXT:    v_add_i32_e32 v0, vcc, v0, v4
+; CI-NEXT:    v_addc_u32_e32 v1, vcc, v1, v5, vcc
----------------
This is a regression? It looks to be the same cycle count for more code size


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D123835/new/

https://reviews.llvm.org/D123835