Improve jump codegen by setting uniform if jump's flag is workgroup/global uniform

under EU fusion.

Author: jgu222

IGC/Compiler/CISACodeGen/CISABuilder.cpp

@@ -460,14 +460,10 @@ namespace IGC
         VISA_EMask_Ctrl emask = m_encoderState.m_noMask ? vISA_EMASK_M1_NM : vISA_EMASK_M1;
         VISA_Exec_Size execSize = visaExecSize(m_program->m_dispatchSize);
 
-        // As uniform maybe thread-uniform, it will not work for scalar jump
-        // for two threads whose flags are different. Once we improve uniform
-        // analysis to have global (uniform among all threads), not just local
-        // uniform (within a thread), we can still generate scalar jump when flag
-        // is a global uniform.
-        //
-        // For now, just disable uniform goto if EU fusion is on.
-        if (flag == nullptr ||
+        // If EU fusion is on, goto is uniform if flag is workgroup/global uniform;
+        // otherwise, goto is uniform if flag is uniform (thread/workgroup/global).
+        if (flag == nullptr ||   // unconditional jump is always uniform
+            flag->IsWorkGroupOrGlobalUniform() ||
             (!m_program->m_Platform->hasFusedEU() && flag->IsUniform()))
         {
             execSize = EXEC_SIZE_1;