[PATCH] D71864: [X86] Set all bits of zmm register to 1 before fp_to_int when target only supports avx512dq

[LiuChen via Phabricator via llvm-commits]

LiuChen3 created this revision.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

v2f64->v2i64 and v4f64->v4i64 may raise unexpected exceptions when target only support avx512dq because the high bit of zmm register is undef.
This patch will clear zmm register before doing strict_fp_to_int.


https://reviews.llvm.org/D71864

Files:
  llvm/lib/Target/X86/X86InstrAVX512.td
  llvm/test/CodeGen/X86/vec-strict-fptoint-128.ll
  llvm/test/CodeGen/X86/vec-strict-fptoint-256.ll
  llvm/test/CodeGen/X86/vector-constrained-fp-intrinsics.ll

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