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| author | hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-01-07 22:14:43 +0000 |
|---|---|---|
| committer | hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4> | 2003-01-07 22:14:43 +0000 |
| commit | 8a98e28fd9449671250edeefea05ce4868d65ead (patch) | |
| tree | b69303dec14643feb1ed9f6714049e127cdb3831 /gcc/cselib.c | |
| parent | f98c470c1cbd0b284977ad3bd6b88240f9aff070 (diff) | |
| download | gcc-8a98e28fd9449671250edeefea05ce4868d65ead.tar.gz | |
* cselib.c (cselib_current_insn_in_libcall): New static variable.
(new_elt_loc_list, cselib_process_insn, cselib_init): Keep track on whether
we are inside libcall.
* cselib.h (elt_loc_list): Add in_libcall.
* gcse.c (do_local_cprop): Do not copy propagate using insns
in libcalls.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@61023 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/cselib.c')
| -rw-r--r-- | gcc/cselib.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gcc/cselib.c b/gcc/cselib.c index 2ef4c575c1b..63fab2233a9 100644 --- a/gcc/cselib.c +++ b/gcc/cselib.c @@ -85,6 +85,7 @@ static GTY((param_is (cselib_val))) htab_t hash_table; /* This is a global so we don't have to pass this through every function. It is used in new_elt_loc_list to set SETTING_INSN. */ static rtx cselib_current_insn; +static bool cselib_current_insn_in_libcall; /* Every new unknown value gets a unique number. */ static unsigned int next_unknown_value; @@ -165,6 +166,7 @@ new_elt_loc_list (next, loc) el->next = next; el->loc = loc; el->setting_insn = cselib_current_insn; + el->in_libcall = cselib_current_insn_in_libcall; return el; } @@ -1310,6 +1312,10 @@ cselib_process_insn (insn) int i; rtx x; + if (find_reg_note (insn, REG_LIBCALL, NULL)) + cselib_current_insn_in_libcall = true; + if (find_reg_note (insn, REG_RETVAL, NULL)) + cselib_current_insn_in_libcall = false; cselib_current_insn = insn; /* Forget everything at a CODE_LABEL, a volatile asm, or a setjmp. */ @@ -1409,6 +1415,7 @@ cselib_init () hash_table = htab_create_ggc (31, get_value_hash, entry_and_rtx_equal_p, NULL); clear_table (1); + cselib_current_insn_in_libcall = false; } /* Called when the current user is done with cselib. */ |