Add compiler option -ze-skip-fde to skip emission of FDE for

stack call functions Frame Descriptor Entry (FDE) is emitted by VISA in prolog of each stack call function. Leaf functions can skip FDE store.
intel · Sep 15, 2023 · 48ad0dd · 48ad0dd
1 parent 8ed5605
commit 48ad0dd
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Showing 5 changed files with 16 additions and 2 deletions.
diff --git a/IGC/Compiler/CISACodeGen/CISABuilder.cpp b/IGC/Compiler/CISACodeGen/CISABuilder.cpp
@@ -4028,6 +4028,11 @@ namespace IGC
             {
                 SaveOption(vISA_GTPinGetIndirRef, true);
             }
+
+            if (ClContext->m_Options.SkipFDE)
+            {
+                SaveOption(vISA_skipFDE, true);
+            }
         }
 
         bool EnableBarrierInstCounterBits = false;

diff --git a/IGC/Compiler/CISACodeGen/OpenCLKernelCodeGen.cpp b/IGC/Compiler/CISACodeGen/OpenCLKernelCodeGen.cpp
@@ -648,6 +648,11 @@ namespace IGC
             GTPinIndirRef = true;
         }
 
+        if (apiOptions.hasArg(OPT_skip_fde_common))
+        {
+            SkipFDE = true;
+        }
+
         if (const opt::Arg* arg = apiOptions.getLastArg(OPT_required_thread_count_common))
         {
             if (arg->getNumValues() > 0)

diff --git a/IGC/Compiler/CISACodeGen/OpenCLKernelCodeGen.hpp b/IGC/Compiler/CISACodeGen/OpenCLKernelCodeGen.hpp
@@ -143,11 +143,12 @@ namespace IGC
             bool EmitErrorsForLibCompilation        = false;
             uint32_t requiredEUThreadCount          = 0;
 
-
             bool GTPinReRA                          = false;
             bool GTPinGRFInfo                       = false;
             bool GTPinScratchAreaSize               = false;
             bool GTPinIndirRef                      = false;
+            // Skip emission of Frame Descriptor Entry in VISA.
+            bool SkipFDE                            = false;
             uint32_t GTPinScratchAreaSizeValue      = 0;
 
             std::vector<std::string> LargeGRFKernels;

diff --git a/IGC/OCLFE/igd_fcl_mcl/source/clang_tb.cpp b/IGC/OCLFE/igd_fcl_mcl/source/clang_tb.cpp
@@ -1365,7 +1365,8 @@ namespace TC
                             (strcmp(pParam, "-ze-gtpin-grf-info") == 0) || //used by GTPin
                             (strcmp(pParam, "-ze-gtpin-scratch-area-size") == 0) || //used by GTPin
                             (strcmp(pParam, "-ze-opt-enable-auto-large-GRF-mode") == 0) ||
-                            (strcmp(pParam, "-cl-intel-enable-auto-large-GRF-mode") == 0);
+                            (strcmp(pParam, "-cl-intel-enable-auto-large-GRF-mode") == 0) ||
+                            (strcmp(pParam, "-ze-skip-fde") == 0);
 
                         if (isCommonOption)
                         {

diff --git a/IGC/Options/include/igc/Options/CommonApiOptions.td b/IGC/Options/include/igc/Options/CommonApiOptions.td
@@ -28,6 +28,8 @@ defm : CommonJoined<"gtpin-scratch-area-size=">, Alias<gtpin_scratch_area_size_c
 
 defm gtpin_indir_ref : CommonFlag<"gtpin-indir-ref">;
 
+defm skip_fde : CommonFlag<"skip-fde">;
+
 def emit_debug : PlainFlag<"g">,
   HelpText<"Enable generation of debug information and enables kernel debug">;
 // These are coming from NEO when run under debugger.