[PATCH] D129735: [WIP][RISCV] Add new pass to transform undef to pesudo for vector values.

Craig Topper via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Thu Oct 20 09:14:43 PDT 2022


craig.topper added inline comments.


================
Comment at: llvm/test/CodeGen/RISCV/rvv/undef-earlyclobber-chain.ll:19
+  call void @llvm.lifetime.start.p0(i64 400, ptr nonnull %dst) #4
+  %0 = tail call <vscale x 2 x float> @llvm.riscv.vrgather.vx.nxv2f32.i64(<vscale x 2 x float> undef, <vscale x 2 x float> undef, i64 0, i64 0)
+  call void @llvm.riscv.vse.nxv2f32.i64(<vscale x 2 x float> %0, ptr nonnull %dst, i64 0)
----------------
The operands for this instruction make it an obvious candidate for deletion earlier. Can we use more realistic operands that still demonstrate the bug?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D129735/new/

https://reviews.llvm.org/D129735



More information about the llvm-commits mailing list