Changes in code.

Author: jaladreips

IGC/common/igc_flags.h

@@ -959,7 +959,7 @@ DECLARE_IGC_GROUP("Raytracing Options")
     DECLARE_IGC_REGKEY(bool, DisableRTStackOpts, false, "Disable some optimizations that minimize reads/writes to the RTStack", true)
     DECLARE_IGC_REGKEY(bool, DisablePrepareLoadsStores, false, "Disable preparation for MemOpt", true)
     DECLARE_IGC_REGKEY(bool, DisableRayTracingConstantCoalescing, false, "Disable coalescing", true)
-    DECLARE_IGC_REGKEY(bool, DisableMergeAllocas, false, "Do not merge allocas prior to SplitAsyncPass", false)
+    DECLARE_IGC_REGKEY(bool, DisableMergeAllocas, true, "Do not merge allocas prior to SplitAsyncPass", false)
     DECLARE_IGC_REGKEY(DWORD, RayTracingConstantCoalescingMinBlockSize, 4, "Set the minimum load size in # OWords = [1,2,4,8,16].", true)
     DECLARE_IGC_REGKEY(bool, DisableRayTracingOptimizations, false, "Disable RayTracing Optimizations for debugging", true)
     DECLARE_IGC_REGKEY(DWORD, RayTracingCustomTileXDim1D, 0, "X dimension of tile (default: DG2=256, Xe2+=512)", true)