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| author | Alan Modra <amodra@gmail.com> | 2016-08-18 08:11:22 +0930 |
|---|---|---|
| committer | Alan Modra <amodra@gcc.gnu.org> | 2016-08-18 08:11:22 +0930 |
| commit | 66592e95db41216e6fb1d76a831f8efa6bcf0d6f (patch) | |
| tree | f81e4c1cdce3465669f486e5c83c18bd770bc7ee /gcc/reload.c | |
| parent | 6fbf26cc575cd5d50acc63a0d935744399230435 (diff) | |
| download | gcc-66592e95db41216e6fb1d76a831f8efa6bcf0d6f.zip gcc-66592e95db41216e6fb1d76a831f8efa6bcf0d6f.tar.gz gcc-66592e95db41216e6fb1d76a831f8efa6bcf0d6f.tar.bz2 | |
[RELOAD] Don't assume subreg mem address is ok
This patch fixes a case where reload blindly assumes a subreg mem is
OK if its address has been partially reloaded by legitimize_reload_address.
PR rtl-optimization/72771
* reload.c (find_reloads): Don't assume that a subreg mem is OK
when find_reloads_toplev returns address_reloaded==-1.
(alternative_allows_const_pool_ref): Update comment.
testsuite/
* gcc.c-torture/compile/pr72771.c: New.
From-SVN: r239549
Diffstat (limited to 'gcc/reload.c')
| -rw-r--r-- | gcc/reload.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/gcc/reload.c b/gcc/reload.c index afdd56d..cd0d661 100644 --- a/gcc/reload.c +++ b/gcc/reload.c @@ -3961,7 +3961,7 @@ find_reloads (rtx_insn *insn, int replace, int ind_levels, int live_known, there will be no reload needed at all. */ if (plus == NULL_RTX && subreg == NULL_RTX - && alternative_allows_const_pool_ref (this_address_reloaded == 0 + && alternative_allows_const_pool_ref (this_address_reloaded != 1 ? substed_operand[i] : NULL, recog_data.constraints[i], @@ -4606,8 +4606,8 @@ find_reloads (rtx_insn *insn, int replace, int ind_levels, int live_known, /* Return true if alternative number ALTNUM in constraint-string CONSTRAINT is guaranteed to accept a reloaded constant-pool reference. - MEM gives the reference if it didn't need any reloads, otherwise it - is null. */ + MEM gives the reference if its address hasn't been fully reloaded, + otherwise it is NULL. */ static bool alternative_allows_const_pool_ref (rtx mem ATTRIBUTE_UNUSED, |