Remove useless checks for NULL before freeing

This patch has been generated by the following Coccinelle semantic
patch:

// Remove useless checks for NULL before freeing
//
// free (NULL) is a no-op, so there is no need to avoid it

@@
expression E;
@@
+ free (E);
+ E = NULL;
- if (unlikely (E != NULL)) {
-   free(E);
(
-   E = NULL;
|
-   E = 0;
)
   ...
- }

@@
expression E;
type T;
@@
+ free ((T) E);
+ E = NULL;
- if (unlikely (E != NULL)) {
-   free((T) E);
(
-   E = NULL;
|
-   E = 0;
)
   ...
- }

@@
expression E;
@@
+ free (E);
- if (unlikely (E != NULL)) {
-   free (E);
- }

@@
expression E;
type T;
@@
+ free ((T) E);
- if (unlikely (E != NULL)) {
-   free ((T) E);
- }

Reviewed-by: Brian Paul <[email protected]>

6 files changed, 11 insertions, 23 deletions

diff --git a/src/mesa/drivers/dri/common/xmlconfig.c b/src/mesa/drivers/dri/common/xmlconfig.c
index 92974840050..72483a42a5c 100644
--- a/src/mesa/drivers/dri/common/xmlconfig.c
+++ b/src/mesa/drivers/dri/common/xmlconfig.c
@@ -989,8 +989,7 @@ void driParseConfigFiles (driOptionCache *cache, const driOptionCache *info,
 	XML_ParserFree (p);
     }
 
-    if (filenames[1])
-	free(filenames[1]);
+    free(filenames[1]);
 }
 
 void driDestroyOptionInfo (driOptionCache *info) {
@@ -1000,8 +999,7 @@ void driDestroyOptionInfo (driOptionCache *info) {
 	for (i = 0; i < size; ++i) {
 	    if (info->info[i].name) {
 		free(info->info[i].name);
-		if (info->info[i].ranges)
-		    free(info->info[i].ranges);
+		free(info->info[i].ranges);
 	    }
 	}
 	free(info->info);
@@ -1009,8 +1007,7 @@ void driDestroyOptionInfo (driOptionCache *info) {
 }
 
 void driDestroyOptionCache (driOptionCache *cache) {
-    if (cache->values)
-	free(cache->values);
+    free(cache->values);
 }
 
 GLboolean driCheckOption (const driOptionCache *cache, const char *name,
diff --git a/src/mesa/drivers/dri/intel/intel_buffer_objects.c b/src/mesa/drivers/dri/intel/intel_buffer_objects.c
index df8ac7fb301..e1173fe79a2 100644
--- a/src/mesa/drivers/dri/intel/intel_buffer_objects.c
+++ b/src/mesa/drivers/dri/intel/intel_buffer_objects.c
@@ -717,10 +717,8 @@ intel_buffer_object_purgeable(struct gl_context * ctx,
       return intel_buffer_purgeable(intel_obj->buffer);
 
    if (option == GL_RELEASED_APPLE) {
-      if (intel_obj->sys_buffer != NULL) {
-         free(intel_obj->sys_buffer);
-         intel_obj->sys_buffer = NULL;
-      }
+      free(intel_obj->sys_buffer);
+      intel_obj->sys_buffer = NULL;
 
       return GL_RELEASED_APPLE;
    } else {
diff --git a/src/mesa/drivers/dri/intel/intel_tex.c b/src/mesa/drivers/dri/intel/intel_tex.c
index 5d938798d9f..6820f9804e1 100644
--- a/src/mesa/drivers/dri/intel/intel_tex.c
+++ b/src/mesa/drivers/dri/intel/intel_tex.c
@@ -150,10 +150,8 @@ intel_free_texture_image_buffer(struct gl_context * ctx,
       intelImage->base.Buffer = NULL;
    }
 
-   if (intelImage->base.ImageOffsets) {
-      free(intelImage->base.ImageOffsets);
-      intelImage->base.ImageOffsets = NULL;
-   }
+   free(intelImage->base.ImageOffsets);
+   intelImage->base.ImageOffsets = NULL;
 }
 
 /**
diff --git a/src/mesa/drivers/dri/radeon/radeon_common_context.c b/src/mesa/drivers/dri/radeon/radeon_common_context.c
index 6a56891ba41..67f588c00e6 100644
--- a/src/mesa/drivers/dri/radeon/radeon_common_context.c
+++ b/src/mesa/drivers/dri/radeon/radeon_common_context.c
@@ -203,8 +203,7 @@ static void radeon_destroy_atom_list(radeonContextPtr radeon)
 
 	foreach(atom, &radeon->hw.atomlist) {
 		free(atom->cmd);
-		if (atom->lastcmd)
-			free(atom->lastcmd);
+		free(atom->lastcmd);
 	}
 
 }
diff --git a/src/mesa/drivers/dri/radeon/radeon_texture.c b/src/mesa/drivers/dri/radeon/radeon_texture.c
index 223a9872cc9..007e06157e9 100644
--- a/src/mesa/drivers/dri/radeon/radeon_texture.c
+++ b/src/mesa/drivers/dri/radeon/radeon_texture.c
@@ -148,10 +148,8 @@ void radeonFreeTextureImageBuffer(struct gl_context *ctx, struct gl_texture_imag
 		image->base.Buffer = NULL;
 	}
 
-	if (image->base.ImageOffsets) {
-		free(image->base.ImageOffsets);
-		image->base.ImageOffsets = NULL;
-	}
+	free(image->base.ImageOffsets);
+	image->base.ImageOffsets = NULL;
 }
 
 /* Set Data pointer and additional data for mapped texture image */
diff --git a/src/mesa/drivers/x11/fakeglx.c b/src/mesa/drivers/x11/fakeglx.c
index e6e4d7649aa..69c2de189b5 100644
--- a/src/mesa/drivers/x11/fakeglx.c
+++ b/src/mesa/drivers/x11/fakeglx.c
@@ -779,9 +779,7 @@ choose_x_overlay_visual( Display *dpy, int scr,
 
       if (deepvis==NULL || vislist->depth > deepest) {
          /* YES!  found a satisfactory visual */
-         if (deepvis) {
-            free(deepvis);
-         }
+         free(deepvis);
          deepest = vislist->depth;
          deepvis = vislist;
          /* DEBUG  tt = ov->transparent_type;*/