[llvm] [AMDGPU][True16] Legalize S16 for G_STORE/G_LOAD in GlobalISel when True16 is enabled (PR #176963)

[Petar Avramovic via llvm-commits]

================
@@ -1573,6 +1573,16 @@ AMDGPULegalizerInfo::AMDGPULegalizerInfo(const GCNSubtarget &ST_,
                                       {V4S32, ConstantPtr, V4S32, GlobalAlign32},
                                       {S64, ConstantPtr, S64, GlobalAlign32},
                                       {V2S32, ConstantPtr, V2S32, GlobalAlign32}});
+
+    if (ST.useRealTrue16Insts()) {
+      Actions.legalForTypesWithMemDesc({{S16, GlobalPtr, S8, GlobalAlign8},
+                                        {S16, GlobalPtr, S16, GlobalAlign16},
+                                        {S16, LocalPtr, S8, 8},
+                                        {S16, LocalPtr, S16, 16},
+                                        {S16, PrivatePtr, S8, 8},
+                                        {S16, PrivatePtr, S16, 16}});
+    }
----------------
petar-avramovic wrote:

think these explicit checks are enough for test changes in this patch

https://github.com/llvm/llvm-project/pull/176963