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author | mmitchel <mmitchel@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-06-25 15:14:41 +0000 |
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committer | mmitchel <mmitchel@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-06-25 15:14:41 +0000 |
commit | b5ba9f3a669e68503666852be6e3158f03526733 (patch) | |
tree | af8828e1df0f3e051eb29c58c7d958cd177e474d /gcc/emit-rtl.c | |
parent | a85413a6ac28d432734c514cd140ee039daad06b (diff) | |
download | ppe42-gcc-b5ba9f3a669e68503666852be6e3158f03526733.tar.gz ppe42-gcc-b5ba9f3a669e68503666852be6e3158f03526733.zip |
* invoke.texi (-fstrict-aliasing): Document.
* rtl.texi (MEM_ALIAS_SET): Document.
* flags.h (flag_strict_aliasing): Declare.
* toplev.c (flag_strict_aliasing): Define.
(f_options): Add -strict-aliasing.
(main): Set flag_strict_aliasing if -O2 or higher.
* tree.h (tree_type): Add alias_set field.
(TYPE_ALIAS_SET): New macro.
(TYPE_ALIAS_SET_KNOWN_P): Likewise.
(get_alias_set): Declare.
* tree.c (lang_get_alias_set): Define.
(make_node): Initialize TYPE_ALIAS_SET.
(get_alias_set): New function.
* print-tree.c (print_node): Dump the alias set for a type.
* c-tree.h (c_get_alias_set): Declare.
* c-common.c (c_get_alias_set): New function.
* c-decl.c (init_decl_processing): Set lang_get_alias_set.
* expr.c (protect_from_queue): Propogage alias sets.
(expand_assignment): Calculate alias set for new MEMs.
(expand_expr): Likewise.
* function.c (put_var_into_stack): Likewise.
(put_reg_into_stack): Likewise.
(gen_mem_addressof): Likewise.
(assign_parms): Likewise.
* stmt.c (expand_decl): Likewise.
* varasm.c (make_decl_rtl): Eliminate redundant clearing of
DECL_RTL. Calculate alias set for new MEMs.
* rtl.def (REG): Add dummy operand.
(MEM): Add extra operand to store the MEM_ALIAS_SET.
* rtl.h (MEM_ALIAS_SET): New macro.
(gen_rtx_MEM): Declare.
* emit-rtl.c (gen_rtx_MEM): New function.
* gengenrtl.c (sepcial_rtx): Make MEMs special.
* alias.c (CHECK_ALIAS_SETS_FOR_CONSISTENCY): New macro.
(DIFFERENT_ALIAS_SETS_P): Likewise.
(canon_rtx): Propogate the alias set to the new MEM.
(true_dependence): Check the alias sets.
(anti_dependence): Likewise.
(output_dependence): Likewise.
* explow.c (stabilize): Progoate alias sets.
* integrate.c (copy_rtx_and_substitute): Likewise.
* final.c (alter_subreg): Make sure not to leave MEM_IN_STRUCT_P
in an unpredictable state. Propogate alias sets.
* reload1.c (reload): Clear MEM_ALIAS_SET for new MEMs about which
we have no alias information.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@20719 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/emit-rtl.c')
-rw-r--r-- | gcc/emit-rtl.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index 854b9892e2b..8f1b50188bf 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -301,6 +301,20 @@ gen_rtx_REG (mode, regno) return gen_rtx_raw_REG (mode, regno); } +rtx +gen_rtx_MEM (mode, addr) + enum machine_mode mode; + rtx addr; +{ + rtx rt = gen_rtx_raw_MEM (mode, addr); + + /* This field is not cleared by the mere allocation of the rtx, so + we clear it here. */ + MEM_ALIAS_SET (rt) = 0; + + return rt; +} + /* rtx gen_rtx (code, mode, [element1, ..., elementn]) ** ** This routine generates an RTX of the size specified by |