From b0beb30fea73cf557e2a4c13d51ee38ba6fda762 Mon Sep 17 00:00:00 2001
From: Konstantin Zhuravlyov <kzhuravl_dev@outlook.com>
Date: Tue, 11 Jul 2017 22:23:37 +0000
Subject: [PATCH] Enhance synchscope representation (clang)

Relevant changes required for r307722.

Differential Revision: https://reviews.llvm.org/D33109

llvm-svn: 307723
---
 clang/lib/CodeGen/CGBuiltin.cpp             | 27 +++++++++++++--------------
 clang/test/CodeGen/ms-barriers-intrinsics.c |  6 +++---
 2 files changed, 16 insertions(+), 17 deletions(-)

diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
index a92f487..bc90250 100644
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -1810,12 +1810,12 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD,
   case Builtin::BI__atomic_signal_fence:
   case Builtin::BI__c11_atomic_thread_fence:
   case Builtin::BI__c11_atomic_signal_fence: {
-    llvm::SynchronizationScope Scope;
+    llvm::SyncScope::ID SSID;
     if (BuiltinID == Builtin::BI__atomic_signal_fence ||
         BuiltinID == Builtin::BI__c11_atomic_signal_fence)
-      Scope = llvm::SingleThread;
+      SSID = llvm::SyncScope::SingleThread;
     else
-      Scope = llvm::CrossThread;
+      SSID = llvm::SyncScope::System;
     Value *Order = EmitScalarExpr(E->getArg(0));
     if (isa<llvm::ConstantInt>(Order)) {
       int ord = cast<llvm::ConstantInt>(Order)->getZExtValue();
@@ -1825,17 +1825,16 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD,
         break;
       case 1:  // memory_order_consume
       case 2:  // memory_order_acquire
-        Builder.CreateFence(llvm::AtomicOrdering::Acquire, Scope);
+        Builder.CreateFence(llvm::AtomicOrdering::Acquire, SSID);
         break;
       case 3:  // memory_order_release
-        Builder.CreateFence(llvm::AtomicOrdering::Release, Scope);
+        Builder.CreateFence(llvm::AtomicOrdering::Release, SSID);
         break;
       case 4:  // memory_order_acq_rel
-        Builder.CreateFence(llvm::AtomicOrdering::AcquireRelease, Scope);
+        Builder.CreateFence(llvm::AtomicOrdering::AcquireRelease, SSID);
         break;
       case 5:  // memory_order_seq_cst
-        Builder.CreateFence(llvm::AtomicOrdering::SequentiallyConsistent,
-                            Scope);
+        Builder.CreateFence(llvm::AtomicOrdering::SequentiallyConsistent, SSID);
         break;
       }
       return RValue::get(nullptr);
@@ -1852,23 +1851,23 @@ RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD,
     llvm::SwitchInst *SI = Builder.CreateSwitch(Order, ContBB);
 
     Builder.SetInsertPoint(AcquireBB);
-    Builder.CreateFence(llvm::AtomicOrdering::Acquire, Scope);
+    Builder.CreateFence(llvm::AtomicOrdering::Acquire, SSID);
     Builder.CreateBr(ContBB);
     SI->addCase(Builder.getInt32(1), AcquireBB);
     SI->addCase(Builder.getInt32(2), AcquireBB);
 
     Builder.SetInsertPoint(ReleaseBB);
-    Builder.CreateFence(llvm::AtomicOrdering::Release, Scope);
+    Builder.CreateFence(llvm::AtomicOrdering::Release, SSID);
     Builder.CreateBr(ContBB);
     SI->addCase(Builder.getInt32(3), ReleaseBB);
 
     Builder.SetInsertPoint(AcqRelBB);
-    Builder.CreateFence(llvm::AtomicOrdering::AcquireRelease, Scope);
+    Builder.CreateFence(llvm::AtomicOrdering::AcquireRelease, SSID);
     Builder.CreateBr(ContBB);
     SI->addCase(Builder.getInt32(4), AcqRelBB);
 
     Builder.SetInsertPoint(SeqCstBB);
-    Builder.CreateFence(llvm::AtomicOrdering::SequentiallyConsistent, Scope);
+    Builder.CreateFence(llvm::AtomicOrdering::SequentiallyConsistent, SSID);
     Builder.CreateBr(ContBB);
     SI->addCase(Builder.getInt32(5), SeqCstBB);
 
@@ -8039,13 +8038,13 @@ Value *CodeGenFunction::EmitX86BuiltinExpr(unsigned BuiltinID,
 
   case X86::BI__faststorefence: {
     return Builder.CreateFence(llvm::AtomicOrdering::SequentiallyConsistent,
-                               llvm::CrossThread);
+                               llvm::SyncScope::System);
   }
   case X86::BI_ReadWriteBarrier:
   case X86::BI_ReadBarrier:
   case X86::BI_WriteBarrier: {
     return Builder.CreateFence(llvm::AtomicOrdering::SequentiallyConsistent,
-                               llvm::SingleThread);
+                               llvm::SyncScope::SingleThread);
   }
   case X86::BI_BitScanForward:
   case X86::BI_BitScanForward64:
diff --git a/clang/test/CodeGen/ms-barriers-intrinsics.c b/clang/test/CodeGen/ms-barriers-intrinsics.c
index b0dfc30..c7da50c 100644
--- a/clang/test/CodeGen/ms-barriers-intrinsics.c
+++ b/clang/test/CodeGen/ms-barriers-intrinsics.c
@@ -13,19 +13,19 @@ typedef __SIZE_TYPE__ size_t;
 
 void test_ReadWriteBarrier() { _ReadWriteBarrier(); }
 // CHECK-LABEL: define void @test_ReadWriteBarrier
-// CHECK:   fence singlethread seq_cst
+// CHECK:   fence syncscope("singlethread") seq_cst
 // CHECK:   ret void
 // CHECK: }
 
 void test_ReadBarrier() { _ReadBarrier(); }
 // CHECK-LABEL: define void @test_ReadBarrier
-// CHECK:   fence singlethread seq_cst
+// CHECK:   fence syncscope("singlethread") seq_cst
 // CHECK:   ret void
 // CHECK: }
 
 void test_WriteBarrier() { _WriteBarrier(); }
 // CHECK-LABEL: define void @test_WriteBarrier
-// CHECK:   fence singlethread seq_cst
+// CHECK:   fence syncscope("singlethread") seq_cst
 // CHECK:   ret void
 // CHECK: }
 
-- 
2.7.4