[PATCH] D74993: [AArch64] SVE implies fullfp16

[Eli Friedman via Phabricator via llvm-commits]

efriedma created this revision.
efriedma added reviewers: sdesmalen, cameron.mcinally.
Herald added subscribers: hiraditya, kristof.beyls, tschuett.
Herald added a project: LLVM.

This is explicitly guaranteed in ARMARM. And it makes reasoning about vectors easier: we can assume that if a vector operation is legal, the corresponding scalar operation is also legal.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D74993

Files:
  llvm/lib/Target/AArch64/AArch64.td
  llvm/test/CodeGen/AArch64/sve-vector-splat.ll


Index: llvm/test/CodeGen/AArch64/sve-vector-splat.ll
===================================================================
--- llvm/test/CodeGen/AArch64/sve-vector-splat.ll
+++ llvm/test/CodeGen/AArch64/sve-vector-splat.ll
@@ -1,4 +1,4 @@
-; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sve,+fullfp16  < %s | FileCheck %s
+; RUN: llc -mtriple=aarch64-linux-gnu -mattr=+sve < %s | FileCheck %s
 
 ;; Splats of legal integer vector types
 
Index: llvm/lib/Target/AArch64/AArch64.td
===================================================================
--- llvm/lib/Target/AArch64/AArch64.td
+++ llvm/lib/Target/AArch64/AArch64.td
@@ -101,7 +101,7 @@
     "true", "Enable v8.2 data Cache Clean to Point of Persistence" >;
 
 def FeatureSVE : SubtargetFeature<"sve", "HasSVE", "true",
-  "Enable Scalable Vector Extension (SVE) instructions">;
+  "Enable Scalable Vector Extension (SVE) instructions", [FeatureFullFP16]>;
 
 def FeatureSVE2 : SubtargetFeature<"sve2", "HasSVE2", "true",
   "Enable Scalable Vector Extension 2 (SVE2) instructions", [FeatureSVE]>;


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