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| author | Jim Wilson <wilson@cygnus.com> | 1998-03-09 12:03:21 +0000 |
|---|---|---|
| committer | Jim Wilson <wilson@gcc.gnu.org> | 1998-03-09 04:03:21 -0800 |
| commit | bdd3e6abedb77356422ad57820d0c81ee117f800 (patch) | |
| tree | 8a7b7471471c33305b3352c302c6f8a391133159 /gcc/function.c | |
| parent | 25938114e3005a99cc21c9e3bf1c3ca4d1b6bb23 (diff) | |
| download | gcc-bdd3e6abedb77356422ad57820d0c81ee117f800.zip gcc-bdd3e6abedb77356422ad57820d0c81ee117f800.tar.gz gcc-bdd3e6abedb77356422ad57820d0c81ee117f800.tar.bz2 | |
Patch to fix mips64-elf varargs aliasing failures.
* function.c (put_reg_into_stack): Copy MEM_IN_STRUCT_P from new.
(assign_parms): Set aggregate if hide_last_arg and last_named.
From-SVN: r18450
Diffstat (limited to 'gcc/function.c')
| -rw-r--r-- | gcc/function.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/gcc/function.c b/gcc/function.c index 5c3198f..192bc53 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -1441,8 +1441,11 @@ put_reg_into_stack (function, reg, type, promoted_mode, decl_mode, volatile_p, PUT_CODE (reg, MEM); /* If this is a memory ref that contains aggregate components, - mark it as such for cse and loop optimize. */ - MEM_IN_STRUCT_P (reg) = AGGREGATE_TYPE_P (type); + mark it as such for cse and loop optimize. If we are reusing a + previously generated stack slot, then we need to copy the bit in + case it was set for other reasons. For instance, it is set for + __builtin_va_alist. */ + MEM_IN_STRUCT_P (reg) = AGGREGATE_TYPE_P (type) | MEM_IN_STRUCT_P (new); /* Now make sure that all refs to the variable, previously made when it was a register, are fixed up to be valid again. */ @@ -3650,6 +3653,12 @@ assign_parms (fndecl, second_time) #else int named_arg = ! last_named; #endif + /* If this is a varargs function, then we want to treat the last named + argument as if it was an aggregate, because it might be accessed as + one by the va_arg macros. This is necessary to make the aliasing + code handle this parm correctly. */ + if (hide_last_arg && last_named) + aggregate = 1; if (TREE_TYPE (parm) == error_mark_node /* This can happen after weird syntax errors |