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| author | Eric Botcazou <ebotcazou@adacore.com> | 2014-07-20 21:00:51 +0000 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2014-07-20 21:00:51 +0000 |
| commit | e304caa4e59b92e063bda89e29147bd7237eac3a (patch) | |
| tree | 1c4e16db6a44569a60735424bb076e93f3c03a36 /gcc | |
| parent | d6cd6e226f990518183cb2c87ced5d9ae70bb4d5 (diff) | |
| download | gcc-e304caa4e59b92e063bda89e29147bd7237eac3a.zip gcc-e304caa4e59b92e063bda89e29147bd7237eac3a.tar.gz gcc-e304caa4e59b92e063bda89e29147bd7237eac3a.tar.bz2 | |
cse.c (exp_equiv_p): For GCSE...
* cse.c (exp_equiv_p) <MEM>: For GCSE, return 0 for expressions with
different trapping status if -fnon-call-exceptions is enabled.
From-SVN: r212879
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/cse.c | 7 |
2 files changed, 12 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 0e5a2985..efb67ba 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2014-07-20 Eric Botcazou <ebotcazou@adacore.com> + * cse.c (exp_equiv_p) <MEM>: For GCSE, return 0 for expressions with + different trapping status if -fnon-call-exceptions is enabled. + +2014-07-20 Eric Botcazou <ebotcazou@adacore.com> + * expr.c (store_field): Handle VOIDmode for calls that return values in multiple locations. @@ -2687,6 +2687,13 @@ exp_equiv_p (const_rtx x, const_rtx y, int validate, bool for_gcse) the same attributes share the same mem_attrs data structure. */ if (MEM_ATTRS (x) != MEM_ATTRS (y)) return 0; + + /* If we are handling exceptions, we cannot consider two expressions + with different trapping status as equivalent, because simple_mem + might accept one and reject the other. */ + if (cfun->can_throw_non_call_exceptions + && (MEM_NOTRAP_P (x) != MEM_NOTRAP_P (y))) + return 0; } break; |