[PATCH] D87104: [OpenMPOpt] Assume indirect call always changes ICV

[Wenlei He via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rG4eef14f9780d: [OpenMPOpt] Assume indirect call always changes ICV (authored by weiwang, committed by wenlei).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D87104/new/

https://reviews.llvm.org/D87104

Files:
  llvm/lib/Transforms/IPO/OpenMPOpt.cpp
  llvm/test/Transforms/OpenMP/icv_tracking.ll


Index: llvm/test/Transforms/OpenMP/icv_tracking.ll
===================================================================
--- llvm/test/Transforms/OpenMP/icv_tracking.ll
+++ llvm/test/Transforms/OpenMP/icv_tracking.ll
@@ -30,6 +30,21 @@
   ret i32 %2
 }
 
+define void @indirect_call(void ()* %0) {
+; CHECK-LABEL: define {{[^@]+}}@indirect_call
+; CHECK-SAME: (void ()* [[TMP0:%.*]])
+; CHECK-NEXT:    call void @omp_set_num_threads(i32 4)
+; CHECK-NEXT:    tail call void [[TMP0]]()
+; CHECK-NEXT:    [[TMP2:%.*]] = tail call i32 @omp_get_max_threads()
+; CHECK-NEXT:    tail call void @use(i32 [[TMP2]])
+; CHECK-NEXT:    ret void
+  call void @omp_set_num_threads(i32 4)
+  tail call void %0()
+  %2 = tail call i32 @omp_get_max_threads()
+  tail call void @use(i32 %2)
+  ret void
+}
+
 define dso_local i32 @foo(i32 %0, i32 %1) {
 ; CHECK-LABEL: define {{[^@]+}}@foo
 ; CHECK-SAME: (i32 [[TMP0:%.*]], i32 [[TMP1:%.*]])
Index: llvm/lib/Transforms/IPO/OpenMPOpt.cpp
===================================================================
--- llvm/lib/Transforms/IPO/OpenMPOpt.cpp
+++ llvm/lib/Transforms/IPO/OpenMPOpt.cpp
@@ -1480,6 +1480,9 @@
     auto &SetterRFI = OMPInfoCache.RFIs[OMPInfoCache.ICVs[ICV].Setter];
     Function *CalledFunction = CB->getCalledFunction();
 
+    // Indirect call, assume ICV changes.
+    if (CalledFunction == nullptr)
+      return nullptr;
     if (CalledFunction == GetterRFI.Declaration)
       return None;
     if (CalledFunction == SetterRFI.Declaration) {


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