commit 23ec773d197cc19c3f52e9d9dc7d3b57a59fb496
author Matt Arsenault <Matthew.Arsenault@amd.com> Sun Jul 12 16:11:53 2020 -0400
committer Matt Arsenault <Matthew.Arsenault@amd.com> Mon Jul 13 14:46:40 2020 -0400
tree 2997839be6392a0f3caf47ae7a280fc08736cccd
parent 6a8c11a11f6cf8d4ef1fa373c9546c33c69f8cb0

GlobalISel: Implement fewerElementsVector for saturating add/sub

llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp

diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index 7cd52df..da519f9 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -3457,6 +3457,10 @@
   case G_FSHL:
   case G_FSHR:
   case G_FREEZE:
+  case G_SADDSAT:
+  case G_SSUBSAT:
+  case G_UADDSAT:
+  case G_USUBSAT:
     return reduceOperationWidth(MI, TypeIdx, NarrowTy);
   case G_SHL:
   case G_LSHR: