Expose option to force linear scan RA via metadata

jaladreips · igcbot · commit 6a6a8a0f22e7 · 2025-08-22T02:21:53.000+02:00
diff --git a/IGC/Compiler/CISACodeGen/CISABuilder.cpp b/IGC/Compiler/CISACodeGen/CISABuilder.cpp
@@ -4078,7 +4078,7 @@ void CEncoder::InitVISABuilderOptions(TARGET_PLATFORM VISAPlatform, bool canAbor
     SaveOption(vISA_Src1Src2OverlapWA, true);
   }
 
-  if (IGC_IS_FLAG_ENABLED(UseLinearScanRA)) {
+  if (!IGC_IS_FLAG_SET(UseLinearScanRA) && context->getModuleMetaData()->compOpt.UseLinearScanRA || IGC_IS_FLAG_ENABLED(UseLinearScanRA)) {
     SaveOption(vISA_LinearScan, true);
   }
 
diff --git a/IGC/common/MDFrameWork.h b/IGC/common/MDFrameWork.h
@@ -506,7 +506,8 @@ enum class ShaderTypeMD
         bool DisableLoopUnroll                          = false;
         unsigned ForcePushConstantMode                  = 0;
         bool UseInstructionHoistingOptimization         = false;
-        bool DisableResourceLoopDestLifeTimeStart = false;
+        bool DisableResourceLoopDestLifeTimeStart       = false;
+        bool UseLinearScanRA                            = false;
     };
 
     enum class ThreadIDLayout

Original file line number	Diff line number	Diff line change
`@@ -4078,7 +4078,7 @@ void CEncoder::InitVISABuilderOptions(TARGET_PLATFORM VISAPlatform, bool canAbor`
`4078`	`4078`	`SaveOption(vISA_Src1Src2OverlapWA, true);`
`4079`	`4079`	`}`
`4080`	`4080`
`4081`		`- if (IGC_IS_FLAG_ENABLED(UseLinearScanRA)) {`
	`4081`	`+ if (!IGC_IS_FLAG_SET(UseLinearScanRA) && context->getModuleMetaData()->compOpt.UseLinearScanRA \|\| IGC_IS_FLAG_ENABLED(UseLinearScanRA)) {`
`4082`	`4082`	`SaveOption(vISA_LinearScan, true);`
`4083`	`4083`	`}`
`4084`	`4084`