OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Avoid copying libcall results directly to user variables.

Browse Source 
From-SVN: r36433
This commit is contained in:
Bernd Schmidt 2000-09-15 15:35:03 +00:00 committed by Bernd Schmidt
parent 4eaa189a5c
commit aff2c2d3af
2 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
gcc/ChangeLog
View File

@ -1,3 +1,8 @@
2000-09-15 Bernd Schmidt <bernds@redhat.co.uk>
* optabs.c (emit_libcall_block): If target is a user variable,
copy to a temporary first.
2000-09-15 Richard Henderson <rth@cygnus.com>
* expmed.c (store_bit_field): Consider naturally aligned

8
gcc/optabs.c
View File

@ -2756,8 +2756,14 @@ emit_libcall_block (insns, target, result, equiv)
rtx result;
rtx equiv;
{
rtx final_dest = target;
rtx prev, next, first, last, insn;
/* If this is a reg with REG_USERVAR_P set, then it could possibly turn
into a MEM later. Protect the libcall block from this change. */
if (! REG_P (target) || REG_USERVAR_P (target))
target = gen_reg_rtx (GET_MODE (target));
/* look for any CALL_INSNs in this sequence, and attach a REG_EH_REGION
reg note to indicate that this call cannot throw or execute a nonlocal
goto. (Unless there is already a REG_EH_REGION note, in which case
@ -2833,6 +2839,8 @@ emit_libcall_block (insns, target, result, equiv)
remove_note (last, find_reg_note (last, REG_EQUAL, NULL_RTX));
}
emit_move_insn (final_dest, target);
if (prev == 0)
first = get_insns ();
else