[Mesa-dev] [PATCH] glsl: Change loop_analysis to not look like a resource leak

[Ian Romanick]

From: Ian Romanick <ian.d.romanick at intel.com>

Previously the loop_state was allocated in the loop_analysis
constructor, but not freed in the (nonexistent) destructor.  Moving
the allocation of the loop_state makes this code appear less sketchy.

Either way, there is no actual leak.  The loop_state is freed by the
single caller of analyze_loop_variables.

Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
Cc: Dave Airlie <airlied at freedesktop.org>
Cc: Matt Turner <mattst88 at gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=57753
---
 src/glsl/loop_analysis.cpp | 13 ++++++-------
 src/glsl/loop_analysis.h   |  2 +-
 2 files changed, 7 insertions(+), 8 deletions(-)

diff --git a/src/glsl/loop_analysis.cpp b/src/glsl/loop_analysis.cpp
index 6a0e4da..191e92d 100644
--- a/src/glsl/loop_analysis.cpp
+++ b/src/glsl/loop_analysis.cpp
@@ -105,7 +105,7 @@ loop_variable_state::insert(ir_if *if_stmt)
 
 class loop_analysis : public ir_hierarchical_visitor {
 public:
-   loop_analysis();
+   loop_analysis(loop_state *loops);
 
    virtual ir_visitor_status visit(ir_loop_jump *);
    virtual ir_visitor_status visit(ir_dereference_variable *);
@@ -129,12 +129,10 @@ public:
 };
 
 
-loop_analysis::loop_analysis()
+loop_analysis::loop_analysis(loop_state *loops)
+   : loops(loops), if_statement_depth(0), current_assignment(NULL)
 {
-   this->loops = new loop_state;
-
-   this->if_statement_depth = 0;
-   this->current_assignment = NULL;
+   /* empty */
 }
 
 
@@ -521,7 +519,8 @@ is_loop_terminator(ir_if *ir)
 loop_state *
 analyze_loop_variables(exec_list *instructions)
 {
-   loop_analysis v;
+   loop_state *loops = new loop_state;
+   loop_analysis v(loops);
 
    v.run(instructions);
    return v.loops;
diff --git a/src/glsl/loop_analysis.h b/src/glsl/loop_analysis.h
index 05c982f..769d626 100644
--- a/src/glsl/loop_analysis.h
+++ b/src/glsl/loop_analysis.h
@@ -249,7 +249,7 @@ private:
 
    void *mem_ctx;
 
-   friend class loop_analysis;
+   friend loop_state *analyze_loop_variables(exec_list *instructions);
 };
 
 #endif /* LOOP_ANALYSIS_H */
-- 
1.7.11.7