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| author | Richard Kenner <kenner@vlsi1.ultra.nyu.edu> | 2000-03-23 22:12:22 +0000 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 2000-03-23 17:12:22 -0500 |
| commit | 25a1fcb433c7e1aef52102292a77483753418e32 (patch) | |
| tree | dd25ec5db7e8a967668ec09dccd7b3a54a0c1657 /gcc | |
| parent | 4b2a62db33607b4e900ff793150ee996e9281420 (diff) | |
| download | gcc-25a1fcb433c7e1aef52102292a77483753418e32.zip gcc-25a1fcb433c7e1aef52102292a77483753418e32.tar.gz gcc-25a1fcb433c7e1aef52102292a77483753418e32.tar.bz2 | |
calls.c (expand_call): If TARGET is passed by reference and is readonly, write a CLOBBER.
* calls.c (expand_call): If TARGET is passed by reference and
is readonly, write a CLOBBER.
From-SVN: r32716
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/calls.c | 8 |
2 files changed, 13 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index baf3ad6..45bfc37 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +Thu Mar 23 17:10:48 2000 Richard Kenner <kenner@vlsi1.ultra.nyu.edu> + + * calls.c (expand_call): If TARGET is passed by reference and + is readonly, write a CLOBBER. + 2000-03-23 Kaveh R. Ghazi <ghazi@caip.rutgers.edu> * builtins.c (expand_builtin): Handle bcmp. diff --git a/gcc/calls.c b/gcc/calls.c index 4c8d573..dfb38ee 100644 --- a/gcc/calls.c +++ b/gcc/calls.c @@ -2776,6 +2776,14 @@ expand_call (exp, target, ignore) if (is_longjmp) current_function_calls_longjmp = 1, sibcall_failure = 1; + /* If this function is returning into a memory location marked as + readonly, it means it is initializing that location. But we normally + treat functions as not clobbering such locations, so we need to + specify that this one does. */ + if (target != 0 && GET_CODE (target) == MEM + && structure_value_addr != 0 && RTX_UNCHANGING_P (target)) + emit_insn (gen_rtx_CLOBBER (VOIDmode, target)); + /* If value type not void, return an rtx for the value. */ /* If there are cleanups to be called, don't use a hard reg as target. |