From 6acc55879cc5243a86ccf96b8495b26a1f2fa961 Mon Sep 17 00:00:00 2001
From: dim <dim@FreeBSD.org>
Date: Tue, 22 Sep 2015 10:00:32 +0000
Subject: [PATCH] Revert merge of clang trunk r244063, which I did not intend
 to commit yet.  Reminder to self: never merge to an unclean tree.

---
 .../llvm/tools/clang/lib/CodeGen/CGAtomic.cpp | 74 +------------------
 1 file changed, 3 insertions(+), 71 deletions(-)

diff --git a/contrib/llvm/tools/clang/lib/CodeGen/CGAtomic.cpp b/contrib/llvm/tools/clang/lib/CodeGen/CGAtomic.cpp
index fc4b66bbbbc3..9839617c0e41 100644
--- a/contrib/llvm/tools/clang/lib/CodeGen/CGAtomic.cpp
+++ b/contrib/llvm/tools/clang/lib/CodeGen/CGAtomic.cpp
@@ -699,7 +699,7 @@ RValue CodeGenFunction::EmitAtomicExpr(AtomicExpr *E, llvm::Value *Dest) {
 
   switch (E->getOp()) {
   case AtomicExpr::AO__c11_atomic_init:
-    llvm_unreachable("Already handled above with EmitAtomicInit!");
+    llvm_unreachable("Already handled!");
 
   case AtomicExpr::AO__c11_atomic_load:
   case AtomicExpr::AO__atomic_load_n:
@@ -785,43 +785,20 @@ RValue CodeGenFunction::EmitAtomicExpr(AtomicExpr *E, llvm::Value *Dest) {
   if (UseLibcall) {
     bool UseOptimizedLibcall = false;
     switch (E->getOp()) {
-    case AtomicExpr::AO__c11_atomic_init:
-      llvm_unreachable("Already handled above with EmitAtomicInit!");
-
     case AtomicExpr::AO__c11_atomic_fetch_add:
     case AtomicExpr::AO__atomic_fetch_add:
     case AtomicExpr::AO__c11_atomic_fetch_and:
     case AtomicExpr::AO__atomic_fetch_and:
     case AtomicExpr::AO__c11_atomic_fetch_or:
     case AtomicExpr::AO__atomic_fetch_or:
-    case AtomicExpr::AO__atomic_fetch_nand:
     case AtomicExpr::AO__c11_atomic_fetch_sub:
     case AtomicExpr::AO__atomic_fetch_sub:
     case AtomicExpr::AO__c11_atomic_fetch_xor:
     case AtomicExpr::AO__atomic_fetch_xor:
-    case AtomicExpr::AO__atomic_add_fetch:
-    case AtomicExpr::AO__atomic_and_fetch:
-    case AtomicExpr::AO__atomic_nand_fetch:
-    case AtomicExpr::AO__atomic_or_fetch:
-    case AtomicExpr::AO__atomic_sub_fetch:
-    case AtomicExpr::AO__atomic_xor_fetch:
       // For these, only library calls for certain sizes exist.
       UseOptimizedLibcall = true;
       break;
-
-    case AtomicExpr::AO__c11_atomic_load:
-    case AtomicExpr::AO__c11_atomic_store:
-    case AtomicExpr::AO__c11_atomic_exchange:
-    case AtomicExpr::AO__c11_atomic_compare_exchange_weak:
-    case AtomicExpr::AO__c11_atomic_compare_exchange_strong:
-    case AtomicExpr::AO__atomic_load_n:
-    case AtomicExpr::AO__atomic_load:
-    case AtomicExpr::AO__atomic_store_n:
-    case AtomicExpr::AO__atomic_store:
-    case AtomicExpr::AO__atomic_exchange_n:
-    case AtomicExpr::AO__atomic_exchange:
-    case AtomicExpr::AO__atomic_compare_exchange_n:
-    case AtomicExpr::AO__atomic_compare_exchange:
+    default:
       // Only use optimized library calls for sizes for which they exist.
       if (Size == 1 || Size == 2 || Size == 4 || Size == 8)
         UseOptimizedLibcall = true;
@@ -843,9 +820,6 @@ RValue CodeGenFunction::EmitAtomicExpr(AtomicExpr *E, llvm::Value *Dest) {
     QualType RetTy;
     bool HaveRetTy = false;
     switch (E->getOp()) {
-    case AtomicExpr::AO__c11_atomic_init:
-      llvm_unreachable("Already handled!");
-
     // There is only one libcall for compare an exchange, because there is no
     // optimisation benefit possible from a libcall version of a weak compare
     // and exchange.
@@ -929,49 +903,7 @@ RValue CodeGenFunction::EmitAtomicExpr(AtomicExpr *E, llvm::Value *Dest) {
       AddDirectArgument(*this, Args, UseOptimizedLibcall, Val1, MemTy,
                         E->getExprLoc(), sizeChars);
       break;
-    // T __atomic_fetch_nand_N(T *mem, T val, int order)
-    case AtomicExpr::AO__atomic_fetch_nand:
-      LibCallName = "__atomic_fetch_nand";
-      AddDirectArgument(*this, Args, UseOptimizedLibcall, Val1, MemTy,
-                        E->getExprLoc(), sizeChars);
-      break;
-
-    // T __atomic_add_fetch_N(T *mem, T val, int order)
-    case AtomicExpr::AO__atomic_add_fetch:
-      LibCallName = "__atomic_add_fetch";
-      AddDirectArgument(*this, Args, UseOptimizedLibcall, Val1, LoweredMemTy,
-                        E->getExprLoc(), sizeChars);
-      break;
-    // T __atomic_and_fetch_N(T *mem, T val, int order)
-    case AtomicExpr::AO__atomic_and_fetch:
-      LibCallName = "__atomic_and_fetch";
-      AddDirectArgument(*this, Args, UseOptimizedLibcall, Val1, MemTy,
-                        E->getExprLoc(), sizeChars);
-      break;
-    // T __atomic_or_fetch_N(T *mem, T val, int order)
-    case AtomicExpr::AO__atomic_or_fetch:
-      LibCallName = "__atomic_or_fetch";
-      AddDirectArgument(*this, Args, UseOptimizedLibcall, Val1, MemTy,
-                        E->getExprLoc(), sizeChars);
-      break;
-    // T __atomic_sub_fetch_N(T *mem, T val, int order)
-    case AtomicExpr::AO__atomic_sub_fetch:
-      LibCallName = "__atomic_sub_fetch";
-      AddDirectArgument(*this, Args, UseOptimizedLibcall, Val1, LoweredMemTy,
-                        E->getExprLoc(), sizeChars);
-      break;
-    // T __atomic_xor_fetch_N(T *mem, T val, int order)
-    case AtomicExpr::AO__atomic_xor_fetch:
-      LibCallName = "__atomic_xor_fetch";
-      AddDirectArgument(*this, Args, UseOptimizedLibcall, Val1, MemTy,
-                        E->getExprLoc(), sizeChars);
-      break;
-    // T __atomic_nand_fetch_N(T *mem, T val, int order)
-    case AtomicExpr::AO__atomic_nand_fetch:
-      LibCallName = "__atomic_nand_fetch";
-      AddDirectArgument(*this, Args, UseOptimizedLibcall, Val1, MemTy,
-                        E->getExprLoc(), sizeChars);
-      break;
+    default: return EmitUnsupportedRValue(E, "atomic library call");
     }
 
     // Optimized functions have the size in their name.