Changes in code.

Author: Dimus77

IGC/AdaptorCommon/ProcessFuncAttributes.cpp

@@ -447,6 +447,13 @@ bool ProcessFuncAttributes::runOnModule(Module& M)
         {
             mustAlwaysInline = true;
         }
+        // Enable inlining for -O0 in order to preserve debug info. This may be removed when debug stack call support is enabled.
+        else if (isOptDisable &&
+            FCtrl == FLAG_FCALL_DEFAULT &&
+            IGC_IS_FLAG_DISABLED(ForceInlineStackCallWithImplArg))
+        {
+            mustAlwaysInline = true;
+        }
         else
         {
             // Add always attribute if function has an argument with opaque type

IGC/common/igc_flags.def

@@ -340,7 +340,7 @@ DECLARE_IGC_REGKEY(bool, EnableLTO,                     true,  "Enable link time
 DECLARE_IGC_REGKEY(bool, EnableLTODebug,                false, "Enable debug information for LTO", true)
 DECLARE_IGC_REGKEY(DWORD, FunctionControl,              0,     "Control function inlining/subroutine/stackcall. See value defs in igc_flags.hpp.", true)
 DECLARE_IGC_REGKEY(bool, EnableStackCallFuncCall,       false, "If enabled, the default function call mode will be set to stack call. Otherwise, subroutine call is used.", false)
-DECLARE_IGC_REGKEY(bool, ForceInlineStackCallWithImplArg, true, "If enabled, stack calls that uses implicit args will be force inlined.", false)
+DECLARE_IGC_REGKEY(bool, ForceInlineStackCallWithImplArg, false, "If enabled, stack calls that uses implicit args will be force inlined.", false)
 DECLARE_IGC_REGKEY(DWORD, OCLInlineThreshold,           512,  "Setting OCL inline thershold", false)
 DECLARE_IGC_REGKEY(bool, DisableAddingAlwaysAttribute,  false, "Disable adding always attribute", true)
 DECLARE_IGC_REGKEY(bool, EnableForceGroupSize,          false, "Enable forcing thread Group Size ForceGroupSizeX and ForceGroupSizeY", false)