4 files changed, 36 insertions, 15 deletions

diff --git a/src/video_core/renderer_opengl/gl_shader_cache.cpp b/src/video_core/renderer_opengl/gl_shader_cache.cpp
index f9b2b03a0..5d76ee12d 100644
--- a/src/video_core/renderer_opengl/gl_shader_cache.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_cache.cpp
@@ -129,9 +129,11 @@ std::size_t CalculateProgramSize(const GLShader::ProgramCode& program) {
 
 /// Hashes one (or two) program streams
 u64 GetUniqueIdentifier(Maxwell::ShaderProgram program_type, const ProgramCode& code,
-                        const ProgramCode& code_b) {
-    u64 unique_identifier =
-        Common::CityHash64(reinterpret_cast<const char*>(code.data()), CalculateProgramSize(code));
+                        const ProgramCode& code_b, std::size_t size_a = 0, std::size_t size_b = 0) {
+    if (size_a == 0) {
+        size_a = CalculateProgramSize(code);
+    }
+    u64 unique_identifier = Common::CityHash64(reinterpret_cast<const char*>(code.data()), size_a);
     if (program_type != Maxwell::ShaderProgram::VertexA) {
         return unique_identifier;
     }
@@ -140,8 +142,11 @@ u64 GetUniqueIdentifier(Maxwell::ShaderProgram program_type, const ProgramCode&
     std::size_t seed = 0;
     boost::hash_combine(seed, unique_identifier);
 
-    const u64 identifier_b = Common::CityHash64(reinterpret_cast<const char*>(code_b.data()),
-                                                CalculateProgramSize(code_b));
+    if (size_b == 0) {
+        size_b = CalculateProgramSize(code_b);
+    }
+    const u64 identifier_b =
+        Common::CityHash64(reinterpret_cast<const char*>(code_b.data()), size_b);
     boost::hash_combine(seed, identifier_b);
     return static_cast<u64>(seed);
 }
@@ -150,14 +155,17 @@ u64 GetUniqueIdentifier(Maxwell::ShaderProgram program_type, const ProgramCode&
 GLShader::ProgramResult CreateProgram(const Device& device, Maxwell::ShaderProgram program_type,
                                       ProgramCode program_code, ProgramCode program_code_b) {
     GLShader::ShaderSetup setup(program_code);
+    setup.program.size_a = CalculateProgramSize(program_code);
+    setup.program.size_b = 0;
     if (program_type == Maxwell::ShaderProgram::VertexA) {
         // VertexB is always enabled, so when VertexA is enabled, we have two vertex shaders.
         // Conventional HW does not support this, so we combine VertexA and VertexB into one
         // stage here.
         setup.SetProgramB(program_code_b);
+        setup.program.size_b = CalculateProgramSize(program_code_b);
     }
-    setup.program.unique_identifier =
-        GetUniqueIdentifier(program_type, program_code, program_code_b);
+    setup.program.unique_identifier = GetUniqueIdentifier(
+        program_type, program_code, program_code_b, setup.program.size_a, setup.program.size_b);
 
     switch (program_type) {
     case Maxwell::ShaderProgram::VertexA:
diff --git a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
index 5f2f1510c..bfc975a04 100644
--- a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
@@ -191,10 +191,12 @@ public:
 
         // TODO(Subv): Figure out the actual depth of the flow stack, for now it seems
         // unlikely that shaders will use 20 nested SSYs and PBKs.
-        constexpr u32 FLOW_STACK_SIZE = 20;
-        for (const auto stack : std::array{MetaStackClass::Ssy, MetaStackClass::Pbk}) {
-            code.AddLine("uint {}[{}];", FlowStackName(stack), FLOW_STACK_SIZE);
-            code.AddLine("uint {} = 0u;", FlowStackTopName(stack));
+        if (!ir.IsFlowStackDisabled()) {
+            constexpr u32 FLOW_STACK_SIZE = 20;
+            for (const auto stack : std::array{MetaStackClass::Ssy, MetaStackClass::Pbk}) {
+                code.AddLine("uint {}[{}];", FlowStackName(stack), FLOW_STACK_SIZE);
+                code.AddLine("uint {} = 0u;", FlowStackTopName(stack));
+            }
         }
 
         code.AddLine("while (true) {{");
@@ -1555,6 +1557,14 @@ private:
         return {};
     }
 
+    std::string BranchIndirect(Operation operation) {
+        const std::string op_a = VisitOperand(operation, 0, Type::Uint);
+
+        code.AddLine("jmp_to = {};", op_a);
+        code.AddLine("break;");
+        return {};
+    }
+
     std::string PushFlowStack(Operation operation) {
         const auto stack = std::get<MetaStackClass>(operation.GetMeta());
         const auto target = std::get_if<ImmediateNode>(&*operation[0]);
@@ -1789,6 +1799,7 @@ private:
         &GLSLDecompiler::ImageStore,
 
         &GLSLDecompiler::Branch,
+        &GLSLDecompiler::BranchIndirect,
         &GLSLDecompiler::PushFlowStack,
         &GLSLDecompiler::PopFlowStack,
         &GLSLDecompiler::Exit,
diff --git a/src/video_core/renderer_opengl/gl_shader_gen.cpp b/src/video_core/renderer_opengl/gl_shader_gen.cpp
index 9148629ec..f9ee8429e 100644
--- a/src/video_core/renderer_opengl/gl_shader_gen.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_gen.cpp
@@ -29,14 +29,14 @@ layout (std140, binding = EMULATION_UBO_BINDING) uniform vs_config {
 };
 
 )";
-    const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET);
+    const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET, setup.program.size_a);
     ProgramResult program =
         Decompile(device, program_ir, Maxwell3D::Regs::ShaderStage::Vertex, "vertex");
 
     out += program.first;
 
     if (setup.IsDualProgram()) {
-        const ShaderIR program_ir_b(setup.program.code_b, PROGRAM_OFFSET);
+        const ShaderIR program_ir_b(setup.program.code_b, PROGRAM_OFFSET, setup.program.size_b);
         ProgramResult program_b =
             Decompile(device, program_ir_b, Maxwell3D::Regs::ShaderStage::Vertex, "vertex_b");
 
@@ -80,7 +80,7 @@ layout (std140, binding = EMULATION_UBO_BINDING) uniform gs_config {
 };
 
 )";
-    const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET);
+    const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET, setup.program.size_a);
     ProgramResult program =
         Decompile(device, program_ir, Maxwell3D::Regs::ShaderStage::Geometry, "geometry");
     out += program.first;
@@ -115,7 +115,7 @@ layout (std140, binding = EMULATION_UBO_BINDING) uniform fs_config {
 };
 
 )";
-    const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET);
+    const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET, setup.program.size_a);
     ProgramResult program =
         Decompile(device, program_ir, Maxwell3D::Regs::ShaderStage::Fragment, "fragment");
 
diff --git a/src/video_core/renderer_opengl/gl_shader_gen.h b/src/video_core/renderer_opengl/gl_shader_gen.h
index 0536c8a03..7cbc590f8 100644
--- a/src/video_core/renderer_opengl/gl_shader_gen.h
+++ b/src/video_core/renderer_opengl/gl_shader_gen.h
@@ -27,6 +27,8 @@ struct ShaderSetup {
         ProgramCode code;
         ProgramCode code_b; // Used for dual vertex shaders
         u64 unique_identifier;
+        std::size_t size_a;
+        std::size_t size_b;
     } program;
 
     /// Used in scenarios where we have a dual vertex shaders