[PATCH] D29690: [AVX512] Improve EXTRACT_VECTOR_ELT with variable index.

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added inline comments.


================
Comment at: lib/Target/X86/X86ISelLowering.cpp:13658
+      (Subtarget.hasAVX512() && (VT == MVT::v16f32 || VT == MVT::v16i32)))
+    return true; // VMERMD/PS
+  if ((Subtarget.hasAVX512() && (VT == MVT::v8f64 || VT == MVT::v8i64)) ||
----------------
// VPERMD/PS


================
Comment at: lib/Target/X86/X86ISelLowering.cpp:13664
+      (Subtarget.hasBWI() && Subtarget.hasVLX() && VT == MVT::v16i16))
+    return true; // VMERMW
+  if ((Subtarget.hasVBMI() && VT == MVT::v64i8) ||
----------------
// VPERMW


Repository:
  rL LLVM

https://reviews.llvm.org/D29690