r600/sfn:explicitly initialize the memory pool

This reduces the overhead of checking with each allocation
whether the pool is already initialized.

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/18983>

src/gallium/drivers/r600/sfn/sfn_memorypool.cpp

@@ -67,7 +67,6 @@ MemoryPool::MemoryPool() noexcept : impl(nullptr)
 MemoryPool& MemoryPool::instance()
 {
     static thread_local MemoryPool me;
-    me.initialize();
     return me;
 }
 
@@ -85,11 +84,13 @@ void MemoryPool::initialize()
 
 void *MemoryPool::allocate(size_t size)
 {
+   assert(impl);
    return impl->pool->allocate(size);
 }
 
 void *MemoryPool::allocate(size_t size, size_t align)
 {
+   assert(impl);
    return impl->pool->allocate(size, align);
 }
 
@@ -100,7 +101,7 @@ void MemoryPool::release_all()
 
 void init_pool()
 {
-    MemoryPool::instance();
+    MemoryPool::instance().initialize();
 }
 
 void release_pool()

src/gallium/drivers/r600/sfn/sfn_nir.cpp

@@ -638,6 +638,9 @@ bool r600_lower_to_scalar_instr_filter(const nir_instr *instr, const void *)
 
 class MallocPoolRelease {
 public:
+   MallocPoolRelease() {
+      r600::init_pool();
+   }
    ~MallocPoolRelease() {
       r600::release_pool();
    }

src/gallium/drivers/r600/sfn/tests/sfn_instrfromstring_test.cpp

@@ -31,7 +31,10 @@ protected:
    void check(const Instr& eval, const Instr& expect);
    void check(const string& init, const Instr& expect);
 
-   InstrFactory m_instr_factory;
+   void SetUp() override;
+   void TearDown() override;
+
+   InstrFactory *m_instr_factory;
 
 };
 
@@ -693,7 +696,7 @@ TestInstrFromString::TestInstrFromString()
 
 PInst TestInstrFromString::from_string(const std::string& s)
 {
-   return m_instr_factory.from_string(s, 0);
+   return m_instr_factory->from_string(s, 0);
 }
 
 void TestInstrFromString::check(const Instr& eval, const Instr& expect)
@@ -714,15 +717,24 @@ void TestInstrFromString::check(const string& init, const Instr& expect)
 
 void TestInstrFromString::add_dest_from_string(const char *init)
 {
-   m_instr_factory.value_factory().dest_from_string(init);
+   m_instr_factory->value_factory().dest_from_string(init);
 }
 
 void TestInstrFromString::add_dest_vec4_from_string(const char *init)
 {
    RegisterVec4::Swizzle dummy;
-   m_instr_factory.value_factory().dest_vec4_from_string(init, dummy);
+   m_instr_factory->value_factory().dest_vec4_from_string(init, dummy);
 }
 
+void TestInstrFromString::SetUp()
+{
+   MemoryPool::instance().initialize();
+   m_instr_factory = new InstrFactory;
+}
 
+void TestInstrFromString::TearDown()
+{
+   MemoryPool::instance().free();
+}
 
 }

src/gallium/drivers/r600/sfn/tests/sfn_shaderfromstring_test.cpp

@@ -18,8 +18,8 @@ class TestShaderFromString : public ::testing::Test
 {
 public:
    void SetUp() override {
-      m_instr_factory = new InstrFactory();
       init_pool();
+      m_instr_factory = new InstrFactory();
    }
 
    void TearDown() override {