[PATCH] D105556: [OpenMP] Set RequiresFullRuntime false in SPMDization

[Giorgis Georgakoudis via Phabricator via llvm-commits]

ggeorgakoudis created this revision.
Herald added subscribers: ormris, guansong, hiraditya, yaxunl.
ggeorgakoudis requested review of this revision.
Herald added a reviewer: jdoerfert.
Herald added subscribers: llvm-commits, sstefan1.
Herald added a project: LLVM.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D105556

Files:
  llvm/lib/Transforms/IPO/OpenMPOpt.cpp


Index: llvm/lib/Transforms/IPO/OpenMPOpt.cpp
===================================================================
--- llvm/lib/Transforms/IPO/OpenMPOpt.cpp
+++ llvm/lib/Transforms/IPO/OpenMPOpt.cpp
@@ -486,7 +486,8 @@
   BooleanStateWithPtrSetVector<CallBase> ReachedUnknownParallelRegions;
 
   /// State to track if we are in SPMD-mode, assumed or know, and why we decided
-  /// we cannot be.
+  /// we cannot be. If it is assumed, then RequiresFullRuntime should also be
+  /// false.
   BooleanStateWithPtrSetVector<Instruction> SPMDCompatibilityTracker;
 
   /// The __kmpc_target_init call in this kernel, if any. If we find more than
@@ -2883,6 +2884,8 @@
     const int InitIsSPMDArgNo = 1;
     const int DeinitIsSPMDArgNo = 1;
     const int InitUseStateMachineArgNo = 2;
+    const int InitRequiresFullRuntimeArgNo = 3;
+    const int DeinitRequiresFullRuntimeArgNo = 2;
 
     auto &Ctx = getAnchorValue().getContext();
     A.changeUseAfterManifest(KernelInitCB->getArgOperandUse(InitIsSPMDArgNo),
@@ -2893,6 +2896,13 @@
     A.changeUseAfterManifest(
         KernelDeinitCB->getArgOperandUse(DeinitIsSPMDArgNo),
         *ConstantInt::getBool(Ctx, 1));
+    A.changeUseAfterManifest(
+        KernelInitCB->getArgOperandUse(InitRequiresFullRuntimeArgNo),
+        *ConstantInt::getBool(Ctx, 0));
+    A.changeUseAfterManifest(
+        KernelDeinitCB->getArgOperandUse(DeinitRequiresFullRuntimeArgNo),
+        *ConstantInt::getBool(Ctx, 0));
+
     ++NumOpenMPTargetRegionKernelsSPMD;
 
     auto Remark = [&](OptimizationRemark OR) {


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