commit 6a1030aa0e4ec239a159c4e43511376b40b8b753
author Petar Avramovic <Petar.Avramovic@amd.com> Mon Jul 20 16:12:19 2020 +0200
committer Petar Avramovic <Petar.Avramovic@amd.com> Mon Jul 20 16:12:19 2020 +0200
tree b1dbabe6170d508a16522b3f60ec70bd6900a7a7
parent 100564bdf87d4ce621d646482a7e589bb2815292

AMDGPU/GlobalISel: Legalize s16->s64 G_FPEXT

Legalize using narrowScalar as s16->s32 G_FPEXT
followed by s32->s64 G_FPEXT.

Differential Revision: https://reviews.llvm.org/D84030

llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp

diff --git a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
index 3471fbe..3ec04d9 100644
--- a/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
+++ b/llvm/lib/CodeGen/GlobalISel/LegalizerHelper.cpp
@@ -1228,6 +1228,13 @@
     Observer.changedInstr(MI);
     return Legalized;
   }
+  case TargetOpcode::G_FPEXT:
+    if (TypeIdx != 0)
+      return UnableToLegalize;
+    Observer.changingInstr(MI);
+    narrowScalarDst(MI, NarrowTy, 0, TargetOpcode::G_FPEXT);
+    Observer.changedInstr(MI);
+    return Legalized;
   }
 }