gallivm: One code memory pool with deferred free.

Provide a JITMemoryManager derivative which puts all generated code into
one memory pool instead of creating a new one each time code is generated.
This saves significant memory per shader as the pool size is 512K and
a small shader occupies just several K.

This memory manager also defers freeing generated code until you tell
it to do so, making it possible to destroy the LLVM engine while keeping
the code, thus enabling future memory savings.

v2: Fix compilation errors with LLVM 3.4 (Jose)

Signed-off-by: José Fonseca <[email protected]>
Reviewed-by: Roland Scheidegger <[email protected]>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_misc.h b/src/gallium/auxiliary/gallivm/lp_bld_misc.h
index 1f735fbcde6..847894bb035 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_misc.h
+++ b/src/gallium/auxiliary/gallivm/lp_bld_misc.h
@@ -39,6 +39,8 @@ extern "C" {
 #endif
 
 
+struct lp_generated_code;
+
 
 extern void
 lp_set_target_options(void);
@@ -54,11 +56,15 @@ lp_build_load_volatile(LLVMBuilderRef B, LLVMValueRef PointerVal,
 
 extern int
 lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
+                                        struct lp_generated_code **OutCode,
                                         LLVMModuleRef M,
                                         unsigned OptLevel,
                                         int useMCJIT,
                                         char **OutError);
 
+extern void
+lp_free_generated_code(struct lp_generated_code *code);
+
 
 #ifdef __cplusplus
 }