Disable InterpreterPatternMatching

By default disable InterpreterPatternMatching due to performance
reasons. Recompilation will be still triggered in some cases, but now
based on register pressure.

Author: stefan-il

IGC/Compiler/CISACodeGen/MatchCommonKernelPatterns.cpp

@@ -37,7 +37,7 @@ bool MatchCommonKernelPatterns::runOnFunction(Function &F) {
   Ctx = getAnalysis<CodeGenContextWrapper>().getCodeGenContext();
 
   // Check if F is part of interpreter pattern.
-  if (IGC_IS_FLAG_ENABLED(EnableInterpreterPatternMatching) && !Ctx->platform.isCoreXE3())
+  if (IGC_IS_FLAG_ENABLED(EnableInterpreterPatternMatching))
     if (isInterpreterPattern(F))
       Ctx->m_kernelsWithForcedRetry.push_back(&F);
 

IGC/Compiler/tests/MatchCommonKernelPatterns/interpreter-typed-pointers.ll

@@ -5,12 +5,12 @@
 ; SPDX-License-Identifier: MIT
 ;
 ;============================ end_copyright_notice =============================
-;
 
-; RUN: igc_opt --match-common-kernel-patterns --print-codegencontext --platformdg2 < %s 2>&1 | FileCheck %s --check-prefix=CHECK-V1
+; REQUIRES: regkeys
+; RUN: igc_opt --match-common-kernel-patterns --regkey EnableInterpreterPatternMatching=1 --print-codegencontext --platformdg2 < %s 2>&1 | FileCheck %s --check-prefix=CHECK-V1
 ; CHECK-V1: Kernel with forced retry: kernel_interpreter_v1
 
-; RUN: igc_opt --match-common-kernel-patterns --print-codegencontext --platformdg2 < %s 2>&1 | FileCheck %s --check-prefix=CHECK-V2
+; RUN: igc_opt --match-common-kernel-patterns --regkey EnableInterpreterPatternMatching=1 --print-codegencontext --platformdg2 < %s 2>&1 | FileCheck %s --check-prefix=CHECK-V2
 ; CHECK-V2: Kernel with forced retry: kernel_interpreter_v2
 
 define spir_kernel void @kernel_interpreter_v1(i32 addrspace(4)* align 4 %addr1, i32 %op1, <8 x i32> %r0, <8 x i32> %payloadHeader) #0 {

IGC/Compiler/tests/MatchCommonKernelPatterns/interpreter.ll

@@ -7,11 +7,11 @@
 ;============================ end_copyright_notice =============================
 ;
 
-; REQUIRES: llvm-14-plus
-; RUN: igc_opt --opaque-pointers --match-common-kernel-patterns --print-codegencontext --platformdg2 < %s 2>&1 | FileCheck %s --check-prefix=CHECK-V1
+; REQUIRES: llvm-14-plus, regkeys
+; RUN: igc_opt --opaque-pointers --match-common-kernel-patterns --regkey EnableInterpreterPatternMatching=1 --print-codegencontext --platformdg2 < %s 2>&1 | FileCheck %s --check-prefix=CHECK-V1
 ; CHECK-V1: Kernel with forced retry: kernel_interpreter_v1
 
-; RUN: igc_opt --opaque-pointers --match-common-kernel-patterns --print-codegencontext --platformdg2 < %s 2>&1 | FileCheck %s --check-prefix=CHECK-V2
+; RUN: igc_opt --opaque-pointers --match-common-kernel-patterns --regkey EnableInterpreterPatternMatching=1 --print-codegencontext --platformdg2 < %s 2>&1 | FileCheck %s --check-prefix=CHECK-V2
 ; CHECK-V2: Kernel with forced retry: kernel_interpreter_v2
 
 define spir_kernel void @kernel_interpreter_v1(ptr addrspace(4) align 4 %addr1, i32 %op1, <8 x i32> %r0, <8 x i32> %payloadHeader) #0 {

IGC/common/igc_flags.h

@@ -513,7 +513,7 @@ DECLARE_IGC_REGKEY(bool, EnableCustomLoopVersioning, true, "Enable IGC to do cus
 DECLARE_IGC_REGKEY(bool, DisableMCSOpt, false, "Disable IGC to run MCS optimization", false)
 DECLARE_IGC_REGKEY(bool, DisableGatingSimilarSamples, false, "Disable Gating of similar sample instructions", false)
 DECLARE_IGC_REGKEY(bool, EnableSoftwareStencil, false, "Enable software stencil for PS.", false)
-DECLARE_IGC_REGKEY(bool, EnableInterpreterPatternMatching, true,
+DECLARE_IGC_REGKEY(bool, EnableInterpreterPatternMatching, false,
                    "Enable Interpreter pattern matching and force retry if the pattern was found.", false)
 DECLARE_IGC_REGKEY(bool, EnableSumFractions, false, "Enable SumFractions optimization in CustomUnsafeOptPass.", false)
 DECLARE_IGC_REGKEY(bool, EnableExtractCommonMultiplier, false,