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| author | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-09-03 17:22:40 +0000 |
|---|---|---|
| committer | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2004-09-03 17:22:40 +0000 |
| commit | 6b5553e50fff7ad0835e807fc006c0bcfe1816f7 (patch) | |
| tree | 63c3bd6632b4fa9e9fe6de7b0c1e6e63755301d5 /gcc/stor-layout.c | |
| parent | 243f8437f36d761c9a80748f73e3830bb881d6f8 (diff) | |
| download | gcc-6b5553e50fff7ad0835e807fc006c0bcfe1816f7.tar.gz | |
PR c/7054
* defaults.h (TARGET_DEFAULT_PACK_STRUCT): Provide default.
* tree.h (initial_max_fld_align): Declare
* stor-layout.c (initial_max_fld_align): Define and initialize.
(maximum_field_alignment): Initialize to the same value.
* common.opt: Add -fpack-struct= variant of switch.
* opts.c: Handle -fpack-struct= variant of switch.
* c-pragma.c: Change #pragma pack() handling so that it becomes
compatible to other compilers: accept individual 'push' argument,
make final pop restore (command line) default, correct interaction
of push/pop and sole specification of a new alignment (so that the
sequence #pragma pack(push) - #pragma pack(<n>) becomes identical
to #pragma pack(push, <n>).
* doc/extend.texi: New node "Structure-Packing Pragmas" under
"Pragmas", describing #pragma pack.
* doc/invoke.texi: Document -fpack-struct=<n> variant of switch.
* doc/tm.texi: Adjust description for HANDLE_PRAGMA_PACK_PUSH_POP.
Document new TARGET_DEFAULT_PACK_STRUCT.
testsuite:
* gcc.dg/pack-test-2.c: Adjust to permit and check #pragma pack(push).
* gcc.dg/c99-flex-array-4.c: Add -fpack-struct=8 to provide a
deterministic starting point for the alignment of structure fields.
* gcc.dg/Wpadded.c: Dito.
* g++.dg/abi/vbase10.C: Dito.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@87037 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/stor-layout.c')
| -rw-r--r-- | gcc/stor-layout.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/stor-layout.c b/gcc/stor-layout.c index 395a5f948cb..75ff523c6a1 100644 --- a/gcc/stor-layout.c +++ b/gcc/stor-layout.c @@ -43,7 +43,9 @@ tree sizetype_tab[(int) TYPE_KIND_LAST]; /* If nonzero, this is an upper limit on alignment of structure fields. The value is measured in bits. */ -unsigned int maximum_field_alignment; +unsigned int maximum_field_alignment = TARGET_DEFAULT_PACK_STRUCT * BITS_PER_UNIT; +/* ... and its original value in bytes, specified via -fpack-struct=<value>. */ +unsigned int initial_max_fld_align = TARGET_DEFAULT_PACK_STRUCT; /* If nonzero, the alignment of a bitstring or (power-)set value, in bits. May be overridden by front-ends. */ |