Revert " LSCFuncsResolution pass - fail if atomic uses L1 cache"

This reverts commit add198f.

Author: pszymich

IGC/Compiler/Optimizer/OpenCLPasses/LSCFuncs/LSCFuncsResolution.cpp

@@ -497,7 +497,7 @@ Instruction* LSCFuncsResolution::CreateLSCAtomicIntrinsicCallInst(
         atomArg2,                      // value [cmpxchg] or zero if unused
         getConstantInt32(atomicOp),    // atomic op
         isLocalMem ?                   // cache options (default for local)
-            getConstantInt32(LSC_L1DEF_L3DEF) : getCacheControlOpts(ccOpndIx, true)
+            getConstantInt32(LSC_L1DEF_L3DEF) : getCacheControlOpts(ccOpndIx)
     };
 
     GenISAIntrinsic::ID id =
@@ -807,26 +807,10 @@ Constant *LSCFuncsResolution::getImmediateElementOffset(
     }
 }
 
-Constant *LSCFuncsResolution::getCacheControlOpts(int i, bool isAtomic)
+Constant *LSCFuncsResolution::getCacheControlOpts(int i, bool)
 {
-    Constant *c = getImmediateEnum(i, LSC_L1DEF_L3DEF, LSC_L1IAR_WB_L3C_WB);
-
-    if (isAtomic)
-    {
-        ConstantInt* ci = dyn_cast<ConstantInt>(c);
-        switch (ci->getZExtValue())
-        {
-        case LSC_L1DEF_L3DEF:
-        case LSC_L1UC_L3UC:
-        case LSC_L1UC_L3C_WB:
-            break;
-        default:
-            reportError("atomic must not use caching on L1");
-            c = getConstantInt32(LSC_L1DEF_L3DEF);
-        }
-    }
-
-    return c;
+    // TODO: error if atomic uses any sort of caching on L1
+    return getImmediateEnum(i, LSC_L1DEF_L3DEF, LSC_L1IAR_WB_L3C_WB);
 }
 
 void LSCFuncsResolution::reportError(const char *what) {