I noticed the default capture mode and the discriminator both used ints.
That seems excessive. This shrinks them to 8 bits and 16 bits
respectively. I suppose the discriminator could use the remaining 24
bits of an int allocation unit, if we're worried about more that 64K
lambdas per function. I know, users are strange :) On a 64 bit system
this saves 64 bits, because we also had 32 bits of padding added.
gcc/cp/
* cp-tree.h (struct tree_lambda_expr): Shrink
default_capture_mode & discriminator.
--
Nathan Sidwell
diff --git i/gcc/cp/cp-tree.h w/gcc/cp/cp-tree.h
index a599f3bad1c..d43c53ae29a 100644
--- i/gcc/cp/cp-tree.h
+++ w/gcc/cp/cp-tree.h
@@ -1442,8 +1442,8 @@ struct GTY (()) tree_lambda_expr
tree extra_scope;
vec<tree, va_gc> *pending_proxies;
location_t locus;
- enum cp_lambda_default_capture_mode_type default_capture_mode;
- int discriminator;
+ enum cp_lambda_default_capture_mode_type default_capture_mode : 8;
+ short int discriminator;
};
/* Non-zero if this template specialization has access violations that
