Mesa (master): gallivm: Separate freeing LLVM intermediate data from freeing final code.

[Jose Fonseca]

Module: Mesa
Branch: master
Commit: 865d0312c0dd7411ce813206cef3c399d6641241
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=865d0312c0dd7411ce813206cef3c399d6641241

Author: Frank Henigman <fjhenigman at google.com>
Date:   Tue Oct  1 15:15:42 2013 -0400

gallivm: Separate freeing LLVM intermediate data from freeing final code.

Split free_gallivm_state() into two steps.  First step is
gallivm_free_ir() which cleans up the LLVM scaffolding used to generate
code while preserving the code itself.  Second step is
gallivm_free_code() to free the memory occupied by the code.

v2: s/gallivm_teardown/gallivm_free_ir/ (Jose)

Signed-off-by: José Fonseca <jfonseca at vmware.com>
Reviewed-by: Roland Scheidegger <sroland at vmware.com>

---

 src/gallium/auxiliary/gallivm/lp_bld_init.c |   27 ++++++++++++++++++++-------
 src/gallium/auxiliary/gallivm/lp_bld_init.h |    2 ++
 2 files changed, 22 insertions(+), 7 deletions(-)

diff --git a/src/gallium/auxiliary/gallivm/lp_bld_init.c b/src/gallium/auxiliary/gallivm/lp_bld_init.c
index 982d1db..6feec70 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_init.c
+++ b/src/gallium/auxiliary/gallivm/lp_bld_init.c
@@ -182,10 +182,11 @@ create_pass_manager(struct gallivm_state *gallivm)
 
 
 /**
- * Free gallivm object's LLVM allocations, but not the gallivm object itself.
+ * Free gallivm object's LLVM allocations, but not any generated code
+ * nor the gallivm object itself.
  */
-static void
-free_gallivm_state(struct gallivm_state *gallivm)
+void
+gallivm_free_ir(struct gallivm_state *gallivm)
 {
    if (gallivm->passmgr) {
       LLVMDisposePassManager(gallivm->passmgr);
@@ -212,14 +213,24 @@ free_gallivm_state(struct gallivm_state *gallivm)
    if (!USE_GLOBAL_CONTEXT && gallivm->context)
       LLVMContextDispose(gallivm->context);
 
-   lp_free_generated_code(gallivm->code);
-
    gallivm->engine = NULL;
    gallivm->target = NULL;
    gallivm->module = NULL;
    gallivm->passmgr = NULL;
    gallivm->context = NULL;
    gallivm->builder = NULL;
+}
+
+
+/**
+ * Free LLVM-generated code.  Should be done AFTER gallivm_free_ir().
+ */
+static void
+gallivm_free_code(struct gallivm_state *gallivm)
+{
+   assert(!gallivm->module);
+   assert(!gallivm->engine);
+   lp_free_generated_code(gallivm->code);
    gallivm->code = NULL;
 }
 
@@ -366,7 +377,8 @@ init_gallivm_state(struct gallivm_state *gallivm)
    return TRUE;
 
 fail:
-   free_gallivm_state(gallivm);
+   gallivm_free_ir(gallivm);
+   gallivm_free_code(gallivm);
    return FALSE;
 }
 
@@ -497,7 +509,8 @@ gallivm_create(void)
 void
 gallivm_destroy(struct gallivm_state *gallivm)
 {
-   free_gallivm_state(gallivm);
+   gallivm_free_ir(gallivm);
+   gallivm_free_code(gallivm);
    FREE(gallivm);
 }
 
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_init.h b/src/gallium/auxiliary/gallivm/lp_bld_init.h
index e405b8a..b11e986 100644
--- a/src/gallium/auxiliary/gallivm/lp_bld_init.h
+++ b/src/gallium/auxiliary/gallivm/lp_bld_init.h
@@ -59,6 +59,8 @@ gallivm_create(void);
 void
 gallivm_destroy(struct gallivm_state *gallivm);
 
+void
+gallivm_free_ir(struct gallivm_state *gallivm);
 
 void
 gallivm_verify_function(struct gallivm_state *gallivm,