From c5325c2ff309bf4c262a38d9cdb6312c0348f1e6 Mon Sep 17 00:00:00 2001
From: Bruno <56844494+fab918@users.noreply.github.com>
Date: Sun, 27 Sep 2026 13:23:08 +0200
Subject: [PATCH] perf(cpu): tune Release JIT compilation (#301)

---
 property_sheets/platform.props                             | 2 +-
 property_sheets/release.props                              | 5 +++--
 src/nxemu-cpu/arm_dynarmic_32.cpp                          | 5 +++++
 src/nxemu-cpu/arm_dynarmic_64.cpp                          | 5 +++++
 src/nxemu-cpu/dynarmic/backend/arm64/a32_address_space.cpp | 4 +++-
 src/nxemu-cpu/dynarmic/backend/arm64/a64_address_space.cpp | 4 +++-
 src/nxemu-cpu/dynarmic/backend/x64/a32_interface.cpp       | 4 +++-
 src/nxemu-cpu/dynarmic/backend/x64/a64_interface.cpp       | 4 +++-
 src/nxemu-cpu/dynarmic/interface/optimization_flags.h      | 2 ++
 9 files changed, 28 insertions(+), 7 deletions(-)

diff --git a/property_sheets/platform.props b/property_sheets/platform.props
index 2ef53089..b874c0b9 100644
--- a/property_sheets/platform.props
+++ b/property_sheets/platform.props
@@ -62,7 +62,7 @@
       <PreprocessKeepComments>false</PreprocessKeepComments>
       <StringPooling>true</StringPooling>
       <MinimalRebuild>false</MinimalRebuild>
-      <ExceptionHandling>Async</ExceptionHandling>
+      <ExceptionHandling>Sync</ExceptionHandling>
       <BasicRuntimeChecks>Default</BasicRuntimeChecks>
       <StructMemberAlignment>Default</StructMemberAlignment>
       <BufferSecurityCheck>false</BufferSecurityCheck>
diff --git a/property_sheets/release.props b/property_sheets/release.props
index 7988289f..921a427b 100644
--- a/property_sheets/release.props
+++ b/property_sheets/release.props
@@ -3,14 +3,15 @@
   <ItemDefinitionGroup>
     <ClCompile>
       <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
-      <Optimization>MinSpace</Optimization>
+      <Optimization>MaxSpeed</Optimization>
       <InlineFunctionExpansion>Default</InlineFunctionExpansion>
       <IntrinsicFunctions>true</IntrinsicFunctions>
-      <FavorSizeOrSpeed>Size</FavorSizeOrSpeed>
+      <FavorSizeOrSpeed>Speed</FavorSizeOrSpeed>
       <OmitFramePointers>false</OmitFramePointers>
       <EnableFiberSafeOptimizations>false</EnableFiberSafeOptimizations>
       <WholeProgramOptimization>false</WholeProgramOptimization>
       <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
+      <AdditionalOptions>/Gw %(AdditionalOptions)</AdditionalOptions>
     </ClCompile>
     <Midl>
       <PreprocessorDefinitions>NDEBUG;%(PreprocessorDefinitions)</PreprocessorDefinitions>
diff --git a/src/nxemu-cpu/arm_dynarmic_32.cpp b/src/nxemu-cpu/arm_dynarmic_32.cpp
index 4396a7ec..840ba658 100644
--- a/src/nxemu-cpu/arm_dynarmic_32.cpp
+++ b/src/nxemu-cpu/arm_dynarmic_32.cpp
@@ -238,9 +238,14 @@ std::shared_ptr<Dynarmic::A32::Jit> ArmDynarmic32::MakeJit(IKernelProcess & proc
         config.check_halt_on_memory_access = true;
     }
 
+#if !defined(NDEBUG)
+    config.optimizations &= ~Dynarmic::OptimizationFlag::DisableVerification;
+#endif
+
     // Safe optimizations
     if (cpuSettings.cpu_debug_mode)
     {
+        config.optimizations &= ~Dynarmic::OptimizationFlag::DisableVerification;
         if (!cpuSettings.cpuopt_page_tables)
         {
             config.page_table = nullptr;
diff --git a/src/nxemu-cpu/arm_dynarmic_64.cpp b/src/nxemu-cpu/arm_dynarmic_64.cpp
index fd1b07c8..acc7d04e 100644
--- a/src/nxemu-cpu/arm_dynarmic_64.cpp
+++ b/src/nxemu-cpu/arm_dynarmic_64.cpp
@@ -369,9 +369,14 @@ std::shared_ptr<Dynarmic::A64::Jit> ArmDynarmic64::MakeJit(IKernelProcess & proc
         config.check_halt_on_memory_access = true;
     }
 
+#if !defined(NDEBUG)
+    config.optimizations &= ~Dynarmic::OptimizationFlag::DisableVerification;
+#endif
+
     // Safe optimizations
     if (cpuSettings.cpu_debug_mode)
     {
+        config.optimizations &= ~Dynarmic::OptimizationFlag::DisableVerification;
         if (!cpuSettings.cpuopt_page_tables)
         {
             config.page_table = nullptr;
diff --git a/src/nxemu-cpu/dynarmic/backend/arm64/a32_address_space.cpp b/src/nxemu-cpu/dynarmic/backend/arm64/a32_address_space.cpp
index 9808d53b..42dc1b97 100644
--- a/src/nxemu-cpu/dynarmic/backend/arm64/a32_address_space.cpp
+++ b/src/nxemu-cpu/dynarmic/backend/arm64/a32_address_space.cpp
@@ -176,7 +176,9 @@ IR::Block A32AddressSpace::GenerateIR(IR::LocationDescriptor descriptor) const {
         Optimization::DeadCodeElimination(ir_block);
     }
     Optimization::IdentityRemovalPass(ir_block);
-    Optimization::VerificationPass(ir_block);
+    if (!conf.HasOptimization(OptimizationFlag::DisableVerification)) {
+        Optimization::VerificationPass(ir_block);
+    }
 
     return ir_block;
 }
diff --git a/src/nxemu-cpu/dynarmic/backend/arm64/a64_address_space.cpp b/src/nxemu-cpu/dynarmic/backend/arm64/a64_address_space.cpp
index adb78120..9d82fb47 100644
--- a/src/nxemu-cpu/dynarmic/backend/arm64/a64_address_space.cpp
+++ b/src/nxemu-cpu/dynarmic/backend/arm64/a64_address_space.cpp
@@ -345,7 +345,9 @@ IR::Block A64AddressSpace::GenerateIR(IR::LocationDescriptor descriptor) const {
     if (conf.HasOptimization(OptimizationFlag::MiscIROpt)) {
         Optimization::A64MergeInterpretBlocksPass(ir_block, conf.callbacks);
     }
-    Optimization::VerificationPass(ir_block);
+    if (!conf.HasOptimization(OptimizationFlag::DisableVerification)) {
+        Optimization::VerificationPass(ir_block);
+    }
 
     return ir_block;
 }
diff --git a/src/nxemu-cpu/dynarmic/backend/x64/a32_interface.cpp b/src/nxemu-cpu/dynarmic/backend/x64/a32_interface.cpp
index 84f84f5d..f899789a 100644
--- a/src/nxemu-cpu/dynarmic/backend/x64/a32_interface.cpp
+++ b/src/nxemu-cpu/dynarmic/backend/x64/a32_interface.cpp
@@ -226,7 +226,9 @@ private:
             Optimization::DeadCodeElimination(ir_block);
         }
         Optimization::IdentityRemovalPass(ir_block);
-        Optimization::VerificationPass(ir_block);
+        if (!conf.HasOptimization(OptimizationFlag::DisableVerification)) {
+            Optimization::VerificationPass(ir_block);
+        }
         return emitter.Emit(ir_block);
     }
 
diff --git a/src/nxemu-cpu/dynarmic/backend/x64/a64_interface.cpp b/src/nxemu-cpu/dynarmic/backend/x64/a64_interface.cpp
index 69f455db..fb36b111 100644
--- a/src/nxemu-cpu/dynarmic/backend/x64/a64_interface.cpp
+++ b/src/nxemu-cpu/dynarmic/backend/x64/a64_interface.cpp
@@ -295,7 +295,9 @@ private:
         if (conf.HasOptimization(OptimizationFlag::MiscIROpt)) {
             Optimization::A64MergeInterpretBlocksPass(ir_block, conf.callbacks);
         }
-        Optimization::VerificationPass(ir_block);
+        if (!conf.HasOptimization(OptimizationFlag::DisableVerification)) {
+            Optimization::VerificationPass(ir_block);
+        }
         return emitter.Emit(ir_block).entrypoint;
     }
 
diff --git a/src/nxemu-cpu/dynarmic/interface/optimization_flags.h b/src/nxemu-cpu/dynarmic/interface/optimization_flags.h
index 2f65f0bf..063f16bf 100644
--- a/src/nxemu-cpu/dynarmic/interface/optimization_flags.h
+++ b/src/nxemu-cpu/dynarmic/interface/optimization_flags.h
@@ -32,6 +32,8 @@ enum class OptimizationFlag : std::uint32_t {
     ConstProp = 0x00000010,
     /// This is enables miscellaneous safe IR optimizations.
     MiscIROpt = 0x00000020,
+    /// Disable IR verification passes after translation and optimization.
+    DisableVerification = 0x00000080,
 
     /// This is an UNSAFE optimization that reduces accuracy of fused multiply-add operations.
     /// This unfuses fused instructions to improve performance on host CPUs without FMA support.