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| author | Nathan Sidwell <nathan@acm.org> | 2020-07-22 08:07:25 -0700 |
|---|---|---|
| committer | Nathan Sidwell <nathan@acm.org> | 2020-07-22 08:43:25 -0700 |
| commit | 63fa0927e8aba59b1a301f7d13f5cd0e6bb62a66 (patch) | |
| tree | 050b1f2f42aaeb43645d0ea6eaeb3d7acd29ce4d /gcc/cp | |
| parent | 18d96339d26e31f06707fe234040bde45b6de70b (diff) | |
| download | gcc-63fa0927e8aba59b1a301f7d13f5cd0e6bb62a66.zip gcc-63fa0927e8aba59b1a301f7d13f5cd0e6bb62a66.tar.gz gcc-63fa0927e8aba59b1a301f7d13f5cd0e6bb62a66.tar.bz2 | |
c++: Shrink lambda-expr
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.
Diffstat (limited to 'gcc/cp')
| -rw-r--r-- | gcc/cp/cp-tree.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/gcc/cp/cp-tree.h b/gcc/cp/cp-tree.h index a599f3b..d43c53a 100644 --- a/gcc/cp/cp-tree.h +++ b/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 |