[PATCH] D132784: [AArch64][TTI] Set the cost of XTN to 1 for 2xi64 (to 2xi32) and 8xi16 (to8xi8).

[Mingming Liu via Phabricator via llvm-commits]

mingmingl created this revision.
Herald added subscribers: hiraditya, kristof.beyls.
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mingmingl requested review of this revision.
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Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D132784

Files:
  llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp


Index: llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
===================================================================
--- llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
+++ llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
@@ -1602,7 +1602,9 @@
 
   static const TypeConversionCostTblEntry
   ConversionTbl[] = {
-    { ISD::TRUNCATE, MVT::v4i16, MVT::v4i32,  1 },
+    { ISD::TRUNCATE, MVT::v4i16, MVT::v4i32,  1 }, // xtn
+    { ISD::TRUNCATE, MVT::v8i8,  MVT::v8i16,  1},  // xtn
+    { ISD::TRUNCATE, MVT::v2i32,  MVT::v2i64,  1},  // xtn
     { ISD::TRUNCATE, MVT::v4i32, MVT::v4i64,  0 },
     { ISD::TRUNCATE, MVT::v8i8,  MVT::v8i32,  3 },
     { ISD::TRUNCATE, MVT::v16i8, MVT::v16i32, 6 },


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